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IXWebSocket/third_party/cli11/CLI11.hpp

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#pragma once
// CLI11: Version 1.8.0
// Originally designed by Henry Schreiner
// https://github.com/CLIUtils/CLI11
//
// This is a standalone header file generated by MakeSingleHeader.py in CLI11/scripts
// from: v1.8.0
//
// From LICENSE:
//
// CLI11 1.8 Copyright (c) 2017-2019 University of Cincinnati, developed by Henry
// Schreiner under NSF AWARD 1414736. All rights reserved.
//
// Redistribution and use in source and binary forms of CLI11, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holder nor the names of its contributors
// may be used to endorse or promote products derived from this software without
// specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Standard combined includes:
#include <algorithm>
#include <cmath>
#include <deque>
#include <exception>
#include <fstream>
#include <functional>
#include <iomanip>
#include <iostream>
#include <istream>
#include <iterator>
#include <locale>
#include <map>
#include <memory>
#include <numeric>
#include <set>
#include <sstream>
#include <stdexcept>
#include <string>
#include <sys/stat.h>
#include <sys/types.h>
#include <tuple>
#include <type_traits>
#include <utility>
#include <vector>
// Verbatim copy from CLI/Version.hpp:
#define CLI11_VERSION_MAJOR 1
#define CLI11_VERSION_MINOR 8
#define CLI11_VERSION_PATCH 0
#define CLI11_VERSION "1.8.0"
// Verbatim copy from CLI/Macros.hpp:
// The following version macro is very similar to the one in PyBind11
#if !(defined(_MSC_VER) && __cplusplus == 199711L) && !defined(__INTEL_COMPILER)
#if __cplusplus >= 201402L
#define CLI11_CPP14
#if __cplusplus >= 201703L
#define CLI11_CPP17
#if __cplusplus > 201703L
#define CLI11_CPP20
#endif
#endif
#endif
#elif defined(_MSC_VER) && __cplusplus == 199711L
// MSVC sets _MSVC_LANG rather than __cplusplus (supposedly until the standard is fully implemented)
// Unless you use the /Zc:__cplusplus flag on Visual Studio 2017 15.7 Preview 3 or newer
#if _MSVC_LANG >= 201402L
#define CLI11_CPP14
#if _MSVC_LANG > 201402L && _MSC_VER >= 1910
#define CLI11_CPP17
#if __MSVC_LANG > 201703L && _MSC_VER >= 1910
#define CLI11_CPP20
#endif
#endif
#endif
#endif
#if defined(CLI11_CPP14)
#define CLI11_DEPRECATED(reason) [[deprecated(reason)]]
#elif defined(_MSC_VER)
#define CLI11_DEPRECATED(reason) __declspec(deprecated(reason))
#else
#define CLI11_DEPRECATED(reason) __attribute__((deprecated(reason)))
#endif
// Verbatim copy from CLI/Optional.hpp:
// You can explicitly enable or disable support
// by defining to 1 or 0. Extra check here to ensure it's in the stdlib too.
// We nest the check for __has_include and it's usage
#ifndef CLI11_STD_OPTIONAL
#ifdef __has_include
#if defined(CLI11_CPP17) && __has_include(<optional>)
#define CLI11_STD_OPTIONAL 1
#else
#define CLI11_STD_OPTIONAL 0
#endif
#else
#define CLI11_STD_OPTIONAL 0
#endif
#endif
#ifndef CLI11_EXPERIMENTAL_OPTIONAL
#define CLI11_EXPERIMENTAL_OPTIONAL 0
#endif
#ifndef CLI11_BOOST_OPTIONAL
#define CLI11_BOOST_OPTIONAL 0
#endif
#if CLI11_BOOST_OPTIONAL
#include <boost/version.hpp>
#if BOOST_VERSION < 106100
#error "This boost::optional version is not supported, use 1.61 or better"
#endif
#endif
#if CLI11_STD_OPTIONAL
#include <optional>
#endif
#if CLI11_EXPERIMENTAL_OPTIONAL
#include <experimental/optional>
#endif
#if CLI11_BOOST_OPTIONAL
#include <boost/optional.hpp>
#include <boost/optional/optional_io.hpp>
#endif
// From CLI/Version.hpp:
// From CLI/Macros.hpp:
// From CLI/Optional.hpp:
namespace CLI {
#if CLI11_STD_OPTIONAL
template <typename T> std::istream &operator>>(std::istream &in, std::optional<T> &val) {
T v;
in >> v;
val = v;
return in;
}
#endif
#if CLI11_EXPERIMENTAL_OPTIONAL
template <typename T> std::istream &operator>>(std::istream &in, std::experimental::optional<T> &val) {
T v;
in >> v;
val = v;
return in;
}
#endif
#if CLI11_BOOST_OPTIONAL
template <typename T> std::istream &operator>>(std::istream &in, boost::optional<T> &val) {
T v;
in >> v;
val = v;
return in;
}
#endif
// Export the best optional to the CLI namespace
#if CLI11_STD_OPTIONAL
using std::optional;
#elif CLI11_EXPERIMENTAL_OPTIONAL
using std::experimental::optional;
#elif CLI11_BOOST_OPTIONAL
using boost::optional;
#endif
// This is true if any optional is found
#if CLI11_STD_OPTIONAL || CLI11_EXPERIMENTAL_OPTIONAL || CLI11_BOOST_OPTIONAL
#define CLI11_OPTIONAL 1
#endif
} // namespace CLI
// From CLI/StringTools.hpp:
namespace CLI {
/// Include the items in this namespace to get free conversion of enums to/from streams.
/// (This is available inside CLI as well, so CLI11 will use this without a using statement).
namespace enums {
/// output streaming for enumerations
template <typename T, typename = typename std::enable_if<std::is_enum<T>::value>::type>
std::ostream &operator<<(std::ostream &in, const T &item) {
// make sure this is out of the detail namespace otherwise it won't be found when needed
return in << static_cast<typename std::underlying_type<T>::type>(item);
}
/// input streaming for enumerations
template <typename T, typename = typename std::enable_if<std::is_enum<T>::value>::type>
std::istream &operator>>(std::istream &in, T &item) {
typename std::underlying_type<T>::type i;
in >> i;
item = static_cast<T>(i);
return in;
}
} // namespace enums
/// Export to CLI namespace
using namespace enums;
namespace detail {
// Based on http://stackoverflow.com/questions/236129/split-a-string-in-c
/// Split a string by a delim
inline std::vector<std::string> split(const std::string &s, char delim) {
std::vector<std::string> elems;
// Check to see if empty string, give consistent result
if(s.empty())
elems.emplace_back();
else {
std::stringstream ss;
ss.str(s);
std::string item;
while(std::getline(ss, item, delim)) {
elems.push_back(item);
}
}
return elems;
}
/// simple utility to convert various types to a string
template <typename T> inline std::string as_string(const T &v) {
std::ostringstream s;
s << v;
return s.str();
}
// if the data type is already a string just forward it
template <typename T, typename = typename std::enable_if<std::is_constructible<std::string, T>::value>::type>
inline auto as_string(T &&v) -> decltype(std::forward<T>(v)) {
return std::forward<T>(v);
}
/// Simple function to join a string
template <typename T> std::string join(const T &v, std::string delim = ",") {
std::ostringstream s;
auto beg = std::begin(v);
auto end = std::end(v);
if(beg != end)
s << *beg++;
while(beg != end) {
s << delim << *beg++;
}
return s.str();
}
/// Simple function to join a string from processed elements
template <typename T,
typename Callable,
typename = typename std::enable_if<!std::is_constructible<std::string, Callable>::value>::type>
std::string join(const T &v, Callable func, std::string delim = ",") {
std::ostringstream s;
auto beg = std::begin(v);
auto end = std::end(v);
if(beg != end)
s << func(*beg++);
while(beg != end) {
s << delim << func(*beg++);
}
return s.str();
}
/// Join a string in reverse order
template <typename T> std::string rjoin(const T &v, std::string delim = ",") {
std::ostringstream s;
for(size_t start = 0; start < v.size(); start++) {
if(start > 0)
s << delim;
s << v[v.size() - start - 1];
}
return s.str();
}
// Based roughly on http://stackoverflow.com/questions/25829143/c-trim-whitespace-from-a-string
/// Trim whitespace from left of string
inline std::string &ltrim(std::string &str) {
auto it = std::find_if(str.begin(), str.end(), [](char ch) { return !std::isspace<char>(ch, std::locale()); });
str.erase(str.begin(), it);
return str;
}
/// Trim anything from left of string
inline std::string &ltrim(std::string &str, const std::string &filter) {
auto it = std::find_if(str.begin(), str.end(), [&filter](char ch) { return filter.find(ch) == std::string::npos; });
str.erase(str.begin(), it);
return str;
}
/// Trim whitespace from right of string
inline std::string &rtrim(std::string &str) {
auto it = std::find_if(str.rbegin(), str.rend(), [](char ch) { return !std::isspace<char>(ch, std::locale()); });
str.erase(it.base(), str.end());
return str;
}
/// Trim anything from right of string
inline std::string &rtrim(std::string &str, const std::string &filter) {
auto it =
std::find_if(str.rbegin(), str.rend(), [&filter](char ch) { return filter.find(ch) == std::string::npos; });
str.erase(it.base(), str.end());
return str;
}
/// Trim whitespace from string
inline std::string &trim(std::string &str) { return ltrim(rtrim(str)); }
/// Trim anything from string
inline std::string &trim(std::string &str, const std::string filter) { return ltrim(rtrim(str, filter), filter); }
/// Make a copy of the string and then trim it
inline std::string trim_copy(const std::string &str) {
std::string s = str;
return trim(s);
}
/// Make a copy of the string and then trim it, any filter string can be used (any char in string is filtered)
inline std::string trim_copy(const std::string &str, const std::string &filter) {
std::string s = str;
return trim(s, filter);
}
/// Print a two part "help" string
inline std::ostream &format_help(std::ostream &out, std::string name, std::string description, size_t wid) {
name = " " + name;
out << std::setw(static_cast<int>(wid)) << std::left << name;
if(!description.empty()) {
if(name.length() >= wid)
out << "\n" << std::setw(static_cast<int>(wid)) << "";
for(const char c : description) {
out.put(c);
if(c == '\n') {
out << std::setw(static_cast<int>(wid)) << "";
}
}
}
out << "\n";
return out;
}
/// Verify the first character of an option
template <typename T> bool valid_first_char(T c) {
return std::isalnum(c, std::locale()) || c == '_' || c == '?' || c == '@';
}
/// Verify following characters of an option
template <typename T> bool valid_later_char(T c) { return valid_first_char(c) || c == '.' || c == '-'; }
/// Verify an option name
inline bool valid_name_string(const std::string &str) {
if(str.empty() || !valid_first_char(str[0]))
return false;
for(auto c : str.substr(1))
if(!valid_later_char(c))
return false;
return true;
}
/// Verify that str consists of letters only
inline bool isalpha(const std::string &str) {
return std::all_of(str.begin(), str.end(), [](char c) { return std::isalpha(c, std::locale()); });
}
/// Return a lower case version of a string
inline std::string to_lower(std::string str) {
std::transform(std::begin(str), std::end(str), std::begin(str), [](const std::string::value_type &x) {
return std::tolower(x, std::locale());
});
return str;
}
/// remove underscores from a string
inline std::string remove_underscore(std::string str) {
str.erase(std::remove(std::begin(str), std::end(str), '_'), std::end(str));
return str;
}
/// Find and replace a substring with another substring
inline std::string find_and_replace(std::string str, std::string from, std::string to) {
size_t start_pos = 0;
while((start_pos = str.find(from, start_pos)) != std::string::npos) {
str.replace(start_pos, from.length(), to);
start_pos += to.length();
}
return str;
}
/// check if the flag definitions has possible false flags
inline bool has_default_flag_values(const std::string &flags) {
return (flags.find_first_of("{!") != std::string::npos);
}
inline void remove_default_flag_values(std::string &flags) {
auto loc = flags.find_first_of('{');
while(loc != std::string::npos) {
auto finish = flags.find_first_of("},", loc + 1);
if((finish != std::string::npos) && (flags[finish] == '}')) {
flags.erase(flags.begin() + static_cast<std::ptrdiff_t>(loc),
flags.begin() + static_cast<std::ptrdiff_t>(finish) + 1);
}
loc = flags.find_first_of('{', loc + 1);
}
flags.erase(std::remove(flags.begin(), flags.end(), '!'), flags.end());
}
/// Check if a string is a member of a list of strings and optionally ignore case or ignore underscores
inline std::ptrdiff_t find_member(std::string name,
const std::vector<std::string> names,
bool ignore_case = false,
bool ignore_underscore = false) {
auto it = std::end(names);
if(ignore_case) {
if(ignore_underscore) {
name = detail::to_lower(detail::remove_underscore(name));
it = std::find_if(std::begin(names), std::end(names), [&name](std::string local_name) {
return detail::to_lower(detail::remove_underscore(local_name)) == name;
});
} else {
name = detail::to_lower(name);
it = std::find_if(std::begin(names), std::end(names), [&name](std::string local_name) {
return detail::to_lower(local_name) == name;
});
}
} else if(ignore_underscore) {
name = detail::remove_underscore(name);
it = std::find_if(std::begin(names), std::end(names), [&name](std::string local_name) {
return detail::remove_underscore(local_name) == name;
});
} else
it = std::find(std::begin(names), std::end(names), name);
return (it != std::end(names)) ? (it - std::begin(names)) : (-1);
}
/// Find a trigger string and call a modify callable function that takes the current string and starting position of the
/// trigger and returns the position in the string to search for the next trigger string
template <typename Callable> inline std::string find_and_modify(std::string str, std::string trigger, Callable modify) {
size_t start_pos = 0;
while((start_pos = str.find(trigger, start_pos)) != std::string::npos) {
start_pos = modify(str, start_pos);
}
return str;
}
/// Split a string '"one two" "three"' into 'one two', 'three'
/// Quote characters can be ` ' or "
inline std::vector<std::string> split_up(std::string str) {
const std::string delims("\'\"`");
auto find_ws = [](char ch) { return std::isspace<char>(ch, std::locale()); };
trim(str);
std::vector<std::string> output;
bool embeddedQuote = false;
char keyChar = ' ';
while(!str.empty()) {
if(delims.find_first_of(str[0]) != std::string::npos) {
keyChar = str[0];
auto end = str.find_first_of(keyChar, 1);
while((end != std::string::npos) && (str[end - 1] == '\\')) { // deal with escaped quotes
end = str.find_first_of(keyChar, end + 1);
embeddedQuote = true;
}
if(end != std::string::npos) {
output.push_back(str.substr(1, end - 1));
str = str.substr(end + 1);
} else {
output.push_back(str.substr(1));
str = "";
}
} else {
auto it = std::find_if(std::begin(str), std::end(str), find_ws);
if(it != std::end(str)) {
std::string value = std::string(str.begin(), it);
output.push_back(value);
str = std::string(it, str.end());
} else {
output.push_back(str);
str = "";
}
}
// transform any embedded quotes into the regular character
if(embeddedQuote) {
output.back() = find_and_replace(output.back(), std::string("\\") + keyChar, std::string(1, keyChar));
embeddedQuote = false;
}
trim(str);
}
return output;
}
/// Add a leader to the beginning of all new lines (nothing is added
/// at the start of the first line). `"; "` would be for ini files
///
/// Can't use Regex, or this would be a subs.
inline std::string fix_newlines(std::string leader, std::string input) {
std::string::size_type n = 0;
while(n != std::string::npos && n < input.size()) {
n = input.find('\n', n);
if(n != std::string::npos) {
input = input.substr(0, n + 1) + leader + input.substr(n + 1);
n += leader.size();
}
}
return input;
}
/// This function detects an equal or colon followed by an escaped quote after an argument
/// then modifies the string to replace the equality with a space. This is needed
/// to allow the split up function to work properly and is intended to be used with the find_and_modify function
/// the return value is the offset+1 which is required by the find_and_modify function.
inline size_t escape_detect(std::string &str, size_t offset) {
auto next = str[offset + 1];
if((next == '\"') || (next == '\'') || (next == '`')) {
auto astart = str.find_last_of("-/ \"\'`", offset - 1);
if(astart != std::string::npos) {
if(str[astart] == ((str[offset] == '=') ? '-' : '/'))
str[offset] = ' '; // interpret this as a space so the split_up works properly
}
}
return offset + 1;
}
/// Add quotes if the string contains spaces
inline std::string &add_quotes_if_needed(std::string &str) {
if((str.front() != '"' && str.front() != '\'') || str.front() != str.back()) {
char quote = str.find('"') < str.find('\'') ? '\'' : '"';
if(str.find(' ') != std::string::npos) {
str.insert(0, 1, quote);
str.append(1, quote);
}
}
return str;
}
} // namespace detail
} // namespace CLI
// From CLI/Error.hpp:
namespace CLI {
// Use one of these on all error classes.
// These are temporary and are undef'd at the end of this file.
#define CLI11_ERROR_DEF(parent, name) \
protected: \
name(std::string ename, std::string msg, int exit_code) : parent(std::move(ename), std::move(msg), exit_code) {} \
name(std::string ename, std::string msg, ExitCodes exit_code) \
: parent(std::move(ename), std::move(msg), exit_code) {} \
\
public: \
name(std::string msg, ExitCodes exit_code) : parent(#name, std::move(msg), exit_code) {} \
name(std::string msg, int exit_code) : parent(#name, std::move(msg), exit_code) {}
// This is added after the one above if a class is used directly and builds its own message
#define CLI11_ERROR_SIMPLE(name) \
explicit name(std::string msg) : name(#name, msg, ExitCodes::name) {}
/// These codes are part of every error in CLI. They can be obtained from e using e.exit_code or as a quick shortcut,
/// int values from e.get_error_code().
enum class ExitCodes {
Success = 0,
IncorrectConstruction = 100,
BadNameString,
OptionAlreadyAdded,
FileError,
ConversionError,
ValidationError,
RequiredError,
RequiresError,
ExcludesError,
ExtrasError,
ConfigError,
InvalidError,
HorribleError,
OptionNotFound,
ArgumentMismatch,
BaseClass = 127
};
// Error definitions
/// @defgroup error_group Errors
/// @brief Errors thrown by CLI11
///
/// These are the errors that can be thrown. Some of them, like CLI::Success, are not really errors.
/// @{
/// All errors derive from this one
class Error : public std::runtime_error {
int actual_exit_code;
std::string error_name{"Error"};
public:
int get_exit_code() const { return actual_exit_code; }
std::string get_name() const { return error_name; }
Error(std::string name, std::string msg, int exit_code = static_cast<int>(ExitCodes::BaseClass))
: runtime_error(msg), actual_exit_code(exit_code), error_name(std::move(name)) {}
Error(std::string name, std::string msg, ExitCodes exit_code) : Error(name, msg, static_cast<int>(exit_code)) {}
};
// Note: Using Error::Error constructors does not work on GCC 4.7
/// Construction errors (not in parsing)
class ConstructionError : public Error {
CLI11_ERROR_DEF(Error, ConstructionError)
};
/// Thrown when an option is set to conflicting values (non-vector and multi args, for example)
class IncorrectConstruction : public ConstructionError {
CLI11_ERROR_DEF(ConstructionError, IncorrectConstruction)
CLI11_ERROR_SIMPLE(IncorrectConstruction)
static IncorrectConstruction PositionalFlag(std::string name) {
return IncorrectConstruction(name + ": Flags cannot be positional");
}
static IncorrectConstruction Set0Opt(std::string name) {
return IncorrectConstruction(name + ": Cannot set 0 expected, use a flag instead");
}
static IncorrectConstruction SetFlag(std::string name) {
return IncorrectConstruction(name + ": Cannot set an expected number for flags");
}
static IncorrectConstruction ChangeNotVector(std::string name) {
return IncorrectConstruction(name + ": You can only change the expected arguments for vectors");
}
static IncorrectConstruction AfterMultiOpt(std::string name) {
return IncorrectConstruction(
name + ": You can't change expected arguments after you've changed the multi option policy!");
}
static IncorrectConstruction MissingOption(std::string name) {
return IncorrectConstruction("Option " + name + " is not defined");
}
static IncorrectConstruction MultiOptionPolicy(std::string name) {
return IncorrectConstruction(name + ": multi_option_policy only works for flags and exact value options");
}
};
/// Thrown on construction of a bad name
class BadNameString : public ConstructionError {
CLI11_ERROR_DEF(ConstructionError, BadNameString)
CLI11_ERROR_SIMPLE(BadNameString)
static BadNameString OneCharName(std::string name) { return BadNameString("Invalid one char name: " + name); }
static BadNameString BadLongName(std::string name) { return BadNameString("Bad long name: " + name); }
static BadNameString DashesOnly(std::string name) {
return BadNameString("Must have a name, not just dashes: " + name);
}
static BadNameString MultiPositionalNames(std::string name) {
return BadNameString("Only one positional name allowed, remove: " + name);
}
};
/// Thrown when an option already exists
class OptionAlreadyAdded : public ConstructionError {
CLI11_ERROR_DEF(ConstructionError, OptionAlreadyAdded)
explicit OptionAlreadyAdded(std::string name)
: OptionAlreadyAdded(name + " is already added", ExitCodes::OptionAlreadyAdded) {}
static OptionAlreadyAdded Requires(std::string name, std::string other) {
return OptionAlreadyAdded(name + " requires " + other, ExitCodes::OptionAlreadyAdded);
}
static OptionAlreadyAdded Excludes(std::string name, std::string other) {
return OptionAlreadyAdded(name + " excludes " + other, ExitCodes::OptionAlreadyAdded);
}
};
// Parsing errors
/// Anything that can error in Parse
class ParseError : public Error {
CLI11_ERROR_DEF(Error, ParseError)
};
// Not really "errors"
/// This is a successful completion on parsing, supposed to exit
class Success : public ParseError {
CLI11_ERROR_DEF(ParseError, Success)
Success() : Success("Successfully completed, should be caught and quit", ExitCodes::Success) {}
};
/// -h or --help on command line
class CallForHelp : public ParseError {
CLI11_ERROR_DEF(ParseError, CallForHelp)
CallForHelp() : CallForHelp("This should be caught in your main function, see examples", ExitCodes::Success) {}
};
/// Usually something like --help-all on command line
class CallForAllHelp : public ParseError {
CLI11_ERROR_DEF(ParseError, CallForAllHelp)
CallForAllHelp()
: CallForAllHelp("This should be caught in your main function, see examples", ExitCodes::Success) {}
};
/// Does not output a diagnostic in CLI11_PARSE, but allows to return from main() with a specific error code.
class RuntimeError : public ParseError {
CLI11_ERROR_DEF(ParseError, RuntimeError)
explicit RuntimeError(int exit_code = 1) : RuntimeError("Runtime error", exit_code) {}
};
/// Thrown when parsing an INI file and it is missing
class FileError : public ParseError {
CLI11_ERROR_DEF(ParseError, FileError)
CLI11_ERROR_SIMPLE(FileError)
static FileError Missing(std::string name) { return FileError(name + " was not readable (missing?)"); }
};
/// Thrown when conversion call back fails, such as when an int fails to coerce to a string
class ConversionError : public ParseError {
CLI11_ERROR_DEF(ParseError, ConversionError)
CLI11_ERROR_SIMPLE(ConversionError)
ConversionError(std::string member, std::string name)
: ConversionError("The value " + member + " is not an allowed value for " + name) {}
ConversionError(std::string name, std::vector<std::string> results)
: ConversionError("Could not convert: " + name + " = " + detail::join(results)) {}
static ConversionError TooManyInputsFlag(std::string name) {
return ConversionError(name + ": too many inputs for a flag");
}
static ConversionError TrueFalse(std::string name) {
return ConversionError(name + ": Should be true/false or a number");
}
};
/// Thrown when validation of results fails
class ValidationError : public ParseError {
CLI11_ERROR_DEF(ParseError, ValidationError)
CLI11_ERROR_SIMPLE(ValidationError)
explicit ValidationError(std::string name, std::string msg) : ValidationError(name + ": " + msg) {}
};
/// Thrown when a required option is missing
class RequiredError : public ParseError {
CLI11_ERROR_DEF(ParseError, RequiredError)
explicit RequiredError(std::string name) : RequiredError(name + " is required", ExitCodes::RequiredError) {}
static RequiredError Subcommand(size_t min_subcom) {
if(min_subcom == 1)
return RequiredError("A subcommand");
else
return RequiredError("Requires at least " + std::to_string(min_subcom) + " subcommands",
ExitCodes::RequiredError);
}
static RequiredError Option(size_t min_option, size_t max_option, size_t used, const std::string &option_list) {
if((min_option == 1) && (max_option == 1) && (used == 0))
return RequiredError("Exactly 1 option from [" + option_list + "]");
else if((min_option == 1) && (max_option == 1) && (used > 1))
return RequiredError("Exactly 1 option from [" + option_list + "] is required and " + std::to_string(used) +
" were given",
ExitCodes::RequiredError);
else if((min_option == 1) && (used == 0))
return RequiredError("At least 1 option from [" + option_list + "]");
else if(used < min_option)
return RequiredError("Requires at least " + std::to_string(min_option) + " options used and only " +
std::to_string(used) + "were given from [" + option_list + "]",
ExitCodes::RequiredError);
else if(max_option == 1)
return RequiredError("Requires at most 1 options be given from [" + option_list + "]",
ExitCodes::RequiredError);
else
return RequiredError("Requires at most " + std::to_string(max_option) + " options be used and " +
std::to_string(used) + "were given from [" + option_list + "]",
ExitCodes::RequiredError);
}
};
/// Thrown when the wrong number of arguments has been received
class ArgumentMismatch : public ParseError {
CLI11_ERROR_DEF(ParseError, ArgumentMismatch)
CLI11_ERROR_SIMPLE(ArgumentMismatch)
ArgumentMismatch(std::string name, int expected, size_t recieved)
: ArgumentMismatch(expected > 0 ? ("Expected exactly " + std::to_string(expected) + " arguments to " + name +
", got " + std::to_string(recieved))
: ("Expected at least " + std::to_string(-expected) + " arguments to " + name +
", got " + std::to_string(recieved)),
ExitCodes::ArgumentMismatch) {}
static ArgumentMismatch AtLeast(std::string name, int num) {
return ArgumentMismatch(name + ": At least " + std::to_string(num) + " required");
}
static ArgumentMismatch TypedAtLeast(std::string name, int num, std::string type) {
return ArgumentMismatch(name + ": " + std::to_string(num) + " required " + type + " missing");
}
static ArgumentMismatch FlagOverride(std::string name) {
return ArgumentMismatch(name + " was given a disallowed flag override");
}
};
/// Thrown when a requires option is missing
class RequiresError : public ParseError {
CLI11_ERROR_DEF(ParseError, RequiresError)
RequiresError(std::string curname, std::string subname)
: RequiresError(curname + " requires " + subname, ExitCodes::RequiresError) {}
};
/// Thrown when an excludes option is present
class ExcludesError : public ParseError {
CLI11_ERROR_DEF(ParseError, ExcludesError)
ExcludesError(std::string curname, std::string subname)
: ExcludesError(curname + " excludes " + subname, ExitCodes::ExcludesError) {}
};
/// Thrown when too many positionals or options are found
class ExtrasError : public ParseError {
CLI11_ERROR_DEF(ParseError, ExtrasError)
explicit ExtrasError(std::vector<std::string> args)
: ExtrasError((args.size() > 1 ? "The following arguments were not expected: "
: "The following argument was not expected: ") +
detail::rjoin(args, " "),
ExitCodes::ExtrasError) {}
};
/// Thrown when extra values are found in an INI file
class ConfigError : public ParseError {
CLI11_ERROR_DEF(ParseError, ConfigError)
CLI11_ERROR_SIMPLE(ConfigError)
static ConfigError Extras(std::string item) { return ConfigError("INI was not able to parse " + item); }
static ConfigError NotConfigurable(std::string item) {
return ConfigError(item + ": This option is not allowed in a configuration file");
}
};
/// Thrown when validation fails before parsing
class InvalidError : public ParseError {
CLI11_ERROR_DEF(ParseError, InvalidError)
explicit InvalidError(std::string name)
: InvalidError(name + ": Too many positional arguments with unlimited expected args", ExitCodes::InvalidError) {
}
};
/// This is just a safety check to verify selection and parsing match - you should not ever see it
/// Strings are directly added to this error, but again, it should never be seen.
class HorribleError : public ParseError {
CLI11_ERROR_DEF(ParseError, HorribleError)
CLI11_ERROR_SIMPLE(HorribleError)
};
// After parsing
/// Thrown when counting a non-existent option
class OptionNotFound : public Error {
CLI11_ERROR_DEF(Error, OptionNotFound)
explicit OptionNotFound(std::string name) : OptionNotFound(name + " not found", ExitCodes::OptionNotFound) {}
};
#undef CLI11_ERROR_DEF
#undef CLI11_ERROR_SIMPLE
/// @}
} // namespace CLI
// From CLI/TypeTools.hpp:
namespace CLI {
// Type tools
// Utilities for type enabling
namespace detail {
// Based generally on https://rmf.io/cxx11/almost-static-if
/// Simple empty scoped class
enum class enabler {};
/// An instance to use in EnableIf
constexpr enabler dummy = {};
} // namespace detail
/// A copy of enable_if_t from C++14, compatible with C++11.
///
/// We could check to see if C++14 is being used, but it does not hurt to redefine this
/// (even Google does this: https://github.com/google/skia/blob/master/include/private/SkTLogic.h)
/// It is not in the std namespace anyway, so no harm done.
template <bool B, class T = void> using enable_if_t = typename std::enable_if<B, T>::type;
/// A copy of std::void_t from C++17 (helper for C++11 and C++14)
template <typename... Ts> struct make_void { using type = void; };
/// A copy of std::void_t from C++17 - same reasoning as enable_if_t, it does not hurt to redefine
template <typename... Ts> using void_t = typename make_void<Ts...>::type;
/// A copy of std::conditional_t from C++14 - same reasoning as enable_if_t, it does not hurt to redefine
template <bool B, class T, class F> using conditional_t = typename std::conditional<B, T, F>::type;
/// Check to see if something is a vector (fail check by default)
template <typename T> struct is_vector : std::false_type {};
/// Check to see if something is a vector (true if actually a vector)
template <class T, class A> struct is_vector<std::vector<T, A>> : std::true_type {};
/// Check to see if something is bool (fail check by default)
template <typename T> struct is_bool : std::false_type {};
/// Check to see if something is bool (true if actually a bool)
template <> struct is_bool<bool> : std::true_type {};
/// Check to see if something is a shared pointer
template <typename T> struct is_shared_ptr : std::false_type {};
/// Check to see if something is a shared pointer (True if really a shared pointer)
template <typename T> struct is_shared_ptr<std::shared_ptr<T>> : std::true_type {};
/// Check to see if something is a shared pointer (True if really a shared pointer)
template <typename T> struct is_shared_ptr<const std::shared_ptr<T>> : std::true_type {};
/// Check to see if something is copyable pointer
template <typename T> struct is_copyable_ptr {
static bool const value = is_shared_ptr<T>::value || std::is_pointer<T>::value;
};
/// This can be specialized to override the type deduction for IsMember.
template <typename T> struct IsMemberType { using type = T; };
/// The main custom type needed here is const char * should be a string.
template <> struct IsMemberType<const char *> { using type = std::string; };
namespace detail {
// These are utilities for IsMember
/// Handy helper to access the element_type generically. This is not part of is_copyable_ptr because it requires that
/// pointer_traits<T> be valid.
template <typename T> struct element_type {
using type =
typename std::conditional<is_copyable_ptr<T>::value, typename std::pointer_traits<T>::element_type, T>::type;
};
/// Combination of the element type and value type - remove pointer (including smart pointers) and get the value_type of
/// the container
template <typename T> struct element_value_type { using type = typename element_type<T>::type::value_type; };
/// Adaptor for set-like structure: This just wraps a normal container in a few utilities that do almost nothing.
template <typename T, typename _ = void> struct pair_adaptor : std::false_type {
using value_type = typename T::value_type;
using first_type = typename std::remove_const<value_type>::type;
using second_type = typename std::remove_const<value_type>::type;
/// Get the first value (really just the underlying value)
template <typename Q> static auto first(Q &&pair_value) -> decltype(std::forward<Q>(pair_value)) {
return std::forward<Q>(pair_value);
}
/// Get the second value (really just the underlying value)
template <typename Q> static auto second(Q &&pair_value) -> decltype(std::forward<Q>(pair_value)) {
return std::forward<Q>(pair_value);
}
};
/// Adaptor for map-like structure (true version, must have key_type and mapped_type).
/// This wraps a mapped container in a few utilities access it in a general way.
template <typename T>
struct pair_adaptor<
T,
conditional_t<false, void_t<typename T::value_type::first_type, typename T::value_type::second_type>, void>>
: std::true_type {
using value_type = typename T::value_type;
using first_type = typename std::remove_const<typename value_type::first_type>::type;
using second_type = typename std::remove_const<typename value_type::second_type>::type;
/// Get the first value (really just the underlying value)
template <typename Q> static auto first(Q &&pair_value) -> decltype(std::get<0>(std::forward<Q>(pair_value))) {
return std::get<0>(std::forward<Q>(pair_value));
}
/// Get the second value (really just the underlying value)
template <typename Q> static auto second(Q &&pair_value) -> decltype(std::get<1>(std::forward<Q>(pair_value))) {
return std::get<1>(std::forward<Q>(pair_value));
}
};
// Check for streamability
// Based on https://stackoverflow.com/questions/22758291/how-can-i-detect-if-a-type-can-be-streamed-to-an-stdostream
template <typename S, typename T> class is_streamable {
template <typename SS, typename TT>
static auto test(int) -> decltype(std::declval<SS &>() << std::declval<TT>(), std::true_type());
template <typename, typename> static auto test(...) -> std::false_type;
public:
static const bool value = decltype(test<S, T>(0))::value;
};
/// Convert an object to a string (directly forward if this can become a string)
template <typename T, enable_if_t<std::is_constructible<std::string, T>::value, detail::enabler> = detail::dummy>
auto to_string(T &&value) -> decltype(std::forward<T>(value)) {
return std::forward<T>(value);
}
/// Convert an object to a string (streaming must be supported for that type)
template <typename T,
enable_if_t<!std::is_constructible<std::string, T>::value && is_streamable<std::stringstream, T>::value,
detail::enabler> = detail::dummy>
std::string to_string(T &&value) {
std::stringstream stream;
stream << value;
return stream.str();
}
/// If conversion is not supported, return an empty string (streaming is not supported for that type)
template <typename T,
enable_if_t<!std::is_constructible<std::string, T>::value && !is_streamable<std::stringstream, T>::value,
detail::enabler> = detail::dummy>
std::string to_string(T &&) {
return std::string{};
}
// Type name print
/// Was going to be based on
/// http://stackoverflow.com/questions/1055452/c-get-name-of-type-in-template
/// But this is cleaner and works better in this case
template <typename T,
enable_if_t<std::is_integral<T>::value && std::is_signed<T>::value, detail::enabler> = detail::dummy>
constexpr const char *type_name() {
return "INT";
}
template <typename T,
enable_if_t<std::is_integral<T>::value && std::is_unsigned<T>::value, detail::enabler> = detail::dummy>
constexpr const char *type_name() {
return "UINT";
}
template <typename T, enable_if_t<std::is_floating_point<T>::value, detail::enabler> = detail::dummy>
constexpr const char *type_name() {
return "FLOAT";
}
/// This one should not be used, since vector types print the internal type
template <typename T, enable_if_t<is_vector<T>::value, detail::enabler> = detail::dummy>
constexpr const char *type_name() {
return "VECTOR";
}
/// Print name for enumeration types
template <typename T, enable_if_t<std::is_enum<T>::value, detail::enabler> = detail::dummy>
constexpr const char *type_name() {
return "ENUM";
}
/// Print for all other types
template <typename T,
enable_if_t<!std::is_floating_point<T>::value && !std::is_integral<T>::value && !is_vector<T>::value &&
!std::is_enum<T>::value,
detail::enabler> = detail::dummy>
constexpr const char *type_name() {
return "TEXT";
}
// Lexical cast
/// Convert a flag into an integer value typically binary flags
inline int64_t to_flag_value(std::string val) {
static const std::string trueString("true");
static const std::string falseString("false");
if(val == trueString) {
return 1;
}
if(val == falseString) {
return -1;
}
val = detail::to_lower(val);
int64_t ret;
if(val.size() == 1) {
switch(val[0]) {
case '0':
case 'f':
case 'n':
case '-':
ret = -1;
break;
case '1':
case 't':
case 'y':
case '+':
ret = 1;
break;
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
ret = val[0] - '0';
break;
default:
throw std::invalid_argument("unrecognized character");
}
return ret;
}
if(val == trueString || val == "on" || val == "yes" || val == "enable") {
ret = 1;
} else if(val == falseString || val == "off" || val == "no" || val == "disable") {
ret = -1;
} else {
ret = std::stoll(val);
}
return ret;
}
/// Signed integers
template <
typename T,
enable_if_t<std::is_integral<T>::value && std::is_signed<T>::value && !is_bool<T>::value && !std::is_enum<T>::value,
detail::enabler> = detail::dummy>
bool lexical_cast(std::string input, T &output) {
try {
size_t n = 0;
long long output_ll = std::stoll(input, &n, 0);
output = static_cast<T>(output_ll);
return n == input.size() && static_cast<long long>(output) == output_ll;
} catch(const std::invalid_argument &) {
return false;
} catch(const std::out_of_range &) {
return false;
}
}
/// Unsigned integers
template <typename T,
enable_if_t<std::is_integral<T>::value && std::is_unsigned<T>::value && !is_bool<T>::value, detail::enabler> =
detail::dummy>
bool lexical_cast(std::string input, T &output) {
if(!input.empty() && input.front() == '-')
return false; // std::stoull happily converts negative values to junk without any errors.
try {
size_t n = 0;
unsigned long long output_ll = std::stoull(input, &n, 0);
output = static_cast<T>(output_ll);
return n == input.size() && static_cast<unsigned long long>(output) == output_ll;
} catch(const std::invalid_argument &) {
return false;
} catch(const std::out_of_range &) {
return false;
}
}
/// Boolean values
template <typename T, enable_if_t<is_bool<T>::value, detail::enabler> = detail::dummy>
bool lexical_cast(std::string input, T &output) {
try {
auto out = to_flag_value(input);
output = (out > 0);
return true;
} catch(const std::invalid_argument &) {
return false;
}
}
/// Floats
template <typename T, enable_if_t<std::is_floating_point<T>::value, detail::enabler> = detail::dummy>
bool lexical_cast(std::string input, T &output) {
try {
size_t n = 0;
output = static_cast<T>(std::stold(input, &n));
return n == input.size();
} catch(const std::invalid_argument &) {
return false;
} catch(const std::out_of_range &) {
return false;
}
}
/// String and similar
template <typename T,
enable_if_t<!std::is_floating_point<T>::value && !std::is_integral<T>::value &&
std::is_assignable<T &, std::string>::value,
detail::enabler> = detail::dummy>
bool lexical_cast(std::string input, T &output) {
output = input;
return true;
}
/// Enumerations
template <typename T, enable_if_t<std::is_enum<T>::value, detail::enabler> = detail::dummy>
bool lexical_cast(std::string input, T &output) {
typename std::underlying_type<T>::type val;
bool retval = detail::lexical_cast(input, val);
if(!retval) {
return false;
}
output = static_cast<T>(val);
return true;
}
/// Non-string parsable
template <typename T,
enable_if_t<!std::is_floating_point<T>::value && !std::is_integral<T>::value &&
!std::is_assignable<T &, std::string>::value && !std::is_enum<T>::value,
detail::enabler> = detail::dummy>
bool lexical_cast(std::string input, T &output) {
std::istringstream is;
is.str(input);
is >> output;
return !is.fail() && !is.rdbuf()->in_avail();
}
/// Sum a vector of flag representations
/// The flag vector produces a series of strings in a vector, simple true is represented by a "1", simple false is by
/// "-1" an if numbers are passed by some fashion they are captured as well so the function just checks for the most
/// common true and false strings then uses stoll to convert the rest for summing
template <typename T,
enable_if_t<std::is_integral<T>::value && std::is_unsigned<T>::value, detail::enabler> = detail::dummy>
void sum_flag_vector(const std::vector<std::string> &flags, T &output) {
int64_t count{0};
for(auto &flag : flags) {
count += detail::to_flag_value(flag);
}
output = (count > 0) ? static_cast<T>(count) : T{0};
}
/// Sum a vector of flag representations
/// The flag vector produces a series of strings in a vector, simple true is represented by a "1", simple false is by
/// "-1" an if numbers are passed by some fashion they are captured as well so the function just checks for the most
/// common true and false strings then uses stoll to convert the rest for summing
template <typename T,
enable_if_t<std::is_integral<T>::value && std::is_signed<T>::value, detail::enabler> = detail::dummy>
void sum_flag_vector(const std::vector<std::string> &flags, T &output) {
int64_t count{0};
for(auto &flag : flags) {
count += detail::to_flag_value(flag);
}
output = static_cast<T>(count);
}
} // namespace detail
} // namespace CLI
// From CLI/Split.hpp:
namespace CLI {
namespace detail {
// Returns false if not a short option. Otherwise, sets opt name and rest and returns true
inline bool split_short(const std::string &current, std::string &name, std::string &rest) {
if(current.size() > 1 && current[0] == '-' && valid_first_char(current[1])) {
name = current.substr(1, 1);
rest = current.substr(2);
return true;
} else
return false;
}
// Returns false if not a long option. Otherwise, sets opt name and other side of = and returns true
inline bool split_long(const std::string &current, std::string &name, std::string &value) {
if(current.size() > 2 && current.substr(0, 2) == "--" && valid_first_char(current[2])) {
auto loc = current.find_first_of('=');
if(loc != std::string::npos) {
name = current.substr(2, loc - 2);
value = current.substr(loc + 1);
} else {
name = current.substr(2);
value = "";
}
return true;
} else
return false;
}
// Returns false if not a windows style option. Otherwise, sets opt name and value and returns true
inline bool split_windows_style(const std::string &current, std::string &name, std::string &value) {
if(current.size() > 1 && current[0] == '/' && valid_first_char(current[1])) {
auto loc = current.find_first_of(':');
if(loc != std::string::npos) {
name = current.substr(1, loc - 1);
value = current.substr(loc + 1);
} else {
name = current.substr(1);
value = "";
}
return true;
} else
return false;
}
// Splits a string into multiple long and short names
inline std::vector<std::string> split_names(std::string current) {
std::vector<std::string> output;
size_t val;
while((val = current.find(",")) != std::string::npos) {
output.push_back(trim_copy(current.substr(0, val)));
current = current.substr(val + 1);
}
output.push_back(trim_copy(current));
return output;
}
/// extract default flag values either {def} or starting with a !
inline std::vector<std::pair<std::string, std::string>> get_default_flag_values(const std::string &str) {
std::vector<std::string> flags = split_names(str);
flags.erase(std::remove_if(flags.begin(),
flags.end(),
[](const std::string &name) {
return ((name.empty()) || (!(((name.find_first_of('{') != std::string::npos) &&
(name.back() == '}')) ||
(name[0] == '!'))));
}),
flags.end());
std::vector<std::pair<std::string, std::string>> output;
output.reserve(flags.size());
for(auto &flag : flags) {
auto def_start = flag.find_first_of('{');
std::string defval = "false";
if((def_start != std::string::npos) && (flag.back() == '}')) {
defval = flag.substr(def_start + 1);
defval.pop_back();
flag.erase(def_start, std::string::npos);
}
flag.erase(0, flag.find_first_not_of("-!"));
output.emplace_back(flag, defval);
}
return output;
}
/// Get a vector of short names, one of long names, and a single name
inline std::tuple<std::vector<std::string>, std::vector<std::string>, std::string>
get_names(const std::vector<std::string> &input) {
std::vector<std::string> short_names;
std::vector<std::string> long_names;
std::string pos_name;
for(std::string name : input) {
if(name.length() == 0)
continue;
else if(name.length() > 1 && name[0] == '-' && name[1] != '-') {
if(name.length() == 2 && valid_first_char(name[1]))
short_names.emplace_back(1, name[1]);
else
throw BadNameString::OneCharName(name);
} else if(name.length() > 2 && name.substr(0, 2) == "--") {
name = name.substr(2);
if(valid_name_string(name))
long_names.push_back(name);
else
throw BadNameString::BadLongName(name);
} else if(name == "-" || name == "--") {
throw BadNameString::DashesOnly(name);
} else {
if(pos_name.length() > 0)
throw BadNameString::MultiPositionalNames(name);
pos_name = name;
}
}
return std::tuple<std::vector<std::string>, std::vector<std::string>, std::string>(
short_names, long_names, pos_name);
}
} // namespace detail
} // namespace CLI
// From CLI/ConfigFwd.hpp:
namespace CLI {
class App;
namespace detail {
/// Comma separated join, adds quotes if needed
inline std::string ini_join(std::vector<std::string> args) {
std::ostringstream s;
size_t start = 0;
for(const auto &arg : args) {
if(start++ > 0)
s << " ";
auto it = std::find_if(arg.begin(), arg.end(), [](char ch) { return std::isspace<char>(ch, std::locale()); });
if(it == arg.end())
s << arg;
else if(arg.find_first_of('\"') == std::string::npos)
s << '\"' << arg << '\"';
else
s << '\'' << arg << '\'';
}
return s.str();
}
} // namespace detail
/// Holds values to load into Options
struct ConfigItem {
/// This is the list of parents
std::vector<std::string> parents;
/// This is the name
std::string name;
/// Listing of inputs
std::vector<std::string> inputs;
/// The list of parents and name joined by "."
std::string fullname() const {
std::vector<std::string> tmp = parents;
tmp.emplace_back(name);
return detail::join(tmp, ".");
}
};
/// This class provides a converter for configuration files.
class Config {
protected:
std::vector<ConfigItem> items;
public:
/// Convert an app into a configuration
virtual std::string to_config(const App *, bool, bool, std::string) const = 0;
/// Convert a configuration into an app
virtual std::vector<ConfigItem> from_config(std::istream &) const = 0;
/// Get a flag value
virtual std::string to_flag(const ConfigItem &item) const {
if(item.inputs.size() == 1) {
return item.inputs.at(0);
}
throw ConversionError::TooManyInputsFlag(item.fullname());
}
/// Parse a config file, throw an error (ParseError:ConfigParseError or FileError) on failure
std::vector<ConfigItem> from_file(const std::string &name) {
std::ifstream input{name};
if(!input.good())
throw FileError::Missing(name);
return from_config(input);
}
/// Virtual destructor
virtual ~Config() = default;
};
/// This converter works with INI files
class ConfigINI : public Config {
public:
std::string to_config(const App *, bool default_also, bool write_description, std::string prefix) const override;
std::vector<ConfigItem> from_config(std::istream &input) const override {
std::string line;
std::string section = "default";
std::vector<ConfigItem> output;
while(getline(input, line)) {
std::vector<std::string> items_buffer;
detail::trim(line);
size_t len = line.length();
if(len > 1 && line[0] == '[' && line[len - 1] == ']') {
section = line.substr(1, len - 2);
} else if(len > 0 && line[0] != ';') {
output.emplace_back();
ConfigItem &out = output.back();
// Find = in string, split and recombine
auto pos = line.find('=');
if(pos != std::string::npos) {
out.name = detail::trim_copy(line.substr(0, pos));
std::string item = detail::trim_copy(line.substr(pos + 1));
items_buffer = detail::split_up(item);
} else {
out.name = detail::trim_copy(line);
items_buffer = {"ON"};
}
if(detail::to_lower(section) != "default") {
out.parents = {section};
}
if(out.name.find('.') != std::string::npos) {
std::vector<std::string> plist = detail::split(out.name, '.');
out.name = plist.back();
plist.pop_back();
out.parents.insert(out.parents.end(), plist.begin(), plist.end());
}
out.inputs.insert(std::end(out.inputs), std::begin(items_buffer), std::end(items_buffer));
}
}
return output;
}
};
} // namespace CLI
// From CLI/Validators.hpp:
namespace CLI {
class Option;
/// @defgroup validator_group Validators
/// @brief Some validators that are provided
///
/// These are simple `std::string(const std::string&)` validators that are useful. They return
/// a string if the validation fails. A custom struct is provided, as well, with the same user
/// semantics, but with the ability to provide a new type name.
/// @{
///
class Validator {
protected:
/// This is the description function, if empty the description_ will be used
std::function<std::string()> desc_function_{[]() { return std::string{}; }};
/// This it the base function that is to be called.
/// Returns a string error message if validation fails.
std::function<std::string(std::string &)> func_{[](std::string &) { return std::string{}; }};
/// The name for search purposes of the Validator
std::string name_;
/// Enable for Validator to allow it to be disabled if need be
bool active_{true};
/// specify that a validator should not modify the input
bool non_modifying_{false};
public:
Validator() = default;
/// Construct a Validator with just the description string
explicit Validator(std::string validator_desc) : desc_function_([validator_desc]() { return validator_desc; }) {}
// Construct Validator from basic information
Validator(std::function<std::string(std::string &)> op, std::string validator_desc, std::string validator_name = "")
: desc_function_([validator_desc]() { return validator_desc; }), func_(std::move(op)),
name_(std::move(validator_name)) {}
/// Set the Validator operation function
Validator &operation(std::function<std::string(std::string &)> op) {
func_ = std::move(op);
return *this;
}
/// This is the required operator for a Validator - provided to help
/// users (CLI11 uses the member `func` directly)
std::string operator()(std::string &str) const {
std::string retstring;
if(active_) {
if(non_modifying_) {
std::string value = str;
retstring = func_(value);
} else {
retstring = func_(str);
}
}
return retstring;
};
/// This is the required operator for a Validator - provided to help
/// users (CLI11 uses the member `func` directly)
std::string operator()(const std::string &str) const {
std::string value = str;
return (active_) ? func_(value) : std::string{};
};
/// Specify the type string
Validator &description(std::string validator_desc) {
desc_function_ = [validator_desc]() { return validator_desc; };
return *this;
}
/// Generate type description information for the Validator
std::string get_description() const {
if(active_) {
return desc_function_();
}
return std::string{};
}
/// Specify the type string
Validator &name(std::string validator_name) {
name_ = std::move(validator_name);
return *this;
}
/// Get the name of the Validator
const std::string &get_name() const { return name_; }
/// Specify whether the Validator is active or not
Validator &active(bool active_val = true) {
active_ = active_val;
return *this;
}
/// Specify whether the Validator can be modifying or not
Validator &non_modifying(bool no_modify = true) {
non_modifying_ = no_modify;
return *this;
}
/// Get a boolean if the validator is active
bool get_active() const { return active_; }
/// Get a boolean if the validator is allowed to modify the input returns true if it can modify the input
bool get_modifying() const { return !non_modifying_; }
/// Combining validators is a new validator. Type comes from left validator if function, otherwise only set if the
/// same.
Validator operator&(const Validator &other) const {
Validator newval;
newval._merge_description(*this, other, " AND ");
// Give references (will make a copy in lambda function)
const std::function<std::string(std::string & filename)> &f1 = func_;
const std::function<std::string(std::string & filename)> &f2 = other.func_;
newval.func_ = [f1, f2](std::string &input) {
std::string s1 = f1(input);
std::string s2 = f2(input);
if(!s1.empty() && !s2.empty())
return std::string("(") + s1 + ") AND (" + s2 + ")";
else
return s1 + s2;
};
newval.active_ = (active_ & other.active_);
return newval;
}
/// Combining validators is a new validator. Type comes from left validator if function, otherwise only set if the
/// same.
Validator operator|(const Validator &other) const {
Validator newval;
newval._merge_description(*this, other, " OR ");
// Give references (will make a copy in lambda function)
const std::function<std::string(std::string &)> &f1 = func_;
const std::function<std::string(std::string &)> &f2 = other.func_;
newval.func_ = [f1, f2](std::string &input) {
std::string s1 = f1(input);
std::string s2 = f2(input);
if(s1.empty() || s2.empty())
return std::string();
else
return std::string("(") + s1 + ") OR (" + s2 + ")";
};
newval.active_ = (active_ & other.active_);
return newval;
}
/// Create a validator that fails when a given validator succeeds
Validator operator!() const {
Validator newval;
const std::function<std::string()> &dfunc1 = desc_function_;
newval.desc_function_ = [dfunc1]() {
auto str = dfunc1();
return (!str.empty()) ? std::string("NOT ") + str : std::string{};
};
// Give references (will make a copy in lambda function)
const std::function<std::string(std::string & res)> &f1 = func_;
newval.func_ = [f1, dfunc1](std::string &test) -> std::string {
std::string s1 = f1(test);
if(s1.empty()) {
return std::string("check ") + dfunc1() + " succeeded improperly";
} else
return std::string{};
};
newval.active_ = active_;
return newval;
}
private:
void _merge_description(const Validator &val1, const Validator &val2, const std::string &merger) {
const std::function<std::string()> &dfunc1 = val1.desc_function_;
const std::function<std::string()> &dfunc2 = val2.desc_function_;
desc_function_ = [=]() {
std::string f1 = dfunc1();
std::string f2 = dfunc2();
if((f1.empty()) || (f2.empty())) {
return f1 + f2;
}
return std::string("(") + f1 + ")" + merger + "(" + f2 + ")";
};
}
};
/// Class wrapping some of the accessors of Validator
class CustomValidator : public Validator {
public:
};
// The implementation of the built in validators is using the Validator class;
// the user is only expected to use the const (static) versions (since there's no setup).
// Therefore, this is in detail.
namespace detail {
/// Check for an existing file (returns error message if check fails)
class ExistingFileValidator : public Validator {
public:
ExistingFileValidator() : Validator("FILE") {
func_ = [](std::string &filename) {
struct stat buffer;
bool exist = stat(filename.c_str(), &buffer) == 0;
bool is_dir = (buffer.st_mode & S_IFDIR) != 0;
if(!exist) {
return "File does not exist: " + filename;
} else if(is_dir) {
return "File is actually a directory: " + filename;
}
return std::string();
};
}
};
/// Check for an existing directory (returns error message if check fails)
class ExistingDirectoryValidator : public Validator {
public:
ExistingDirectoryValidator() : Validator("DIR") {
func_ = [](std::string &filename) {
struct stat buffer;
bool exist = stat(filename.c_str(), &buffer) == 0;
bool is_dir = (buffer.st_mode & S_IFDIR) != 0;
if(!exist) {
return "Directory does not exist: " + filename;
} else if(!is_dir) {
return "Directory is actually a file: " + filename;
}
return std::string();
};
}
};
/// Check for an existing path
class ExistingPathValidator : public Validator {
public:
ExistingPathValidator() : Validator("PATH(existing)") {
func_ = [](std::string &filename) {
struct stat buffer;
bool const exist = stat(filename.c_str(), &buffer) == 0;
if(!exist) {
return "Path does not exist: " + filename;
}
return std::string();
};
}
};
/// Check for an non-existing path
class NonexistentPathValidator : public Validator {
public:
NonexistentPathValidator() : Validator("PATH(non-existing)") {
func_ = [](std::string &filename) {
struct stat buffer;
bool exist = stat(filename.c_str(), &buffer) == 0;
if(exist) {
return "Path already exists: " + filename;
}
return std::string();
};
}
};
/// Validate the given string is a legal ipv4 address
class IPV4Validator : public Validator {
public:
IPV4Validator() : Validator("IPV4") {
func_ = [](std::string &ip_addr) {
auto result = CLI::detail::split(ip_addr, '.');
if(result.size() != 4) {
return "Invalid IPV4 address must have four parts " + ip_addr;
}
int num;
bool retval = true;
for(const auto &var : result) {
retval &= detail::lexical_cast(var, num);
if(!retval) {
return "Failed parsing number " + var;
}
if(num < 0 || num > 255) {
return "Each IP number must be between 0 and 255 " + var;
}
}
return std::string();
};
}
};
/// Validate the argument is a number and greater than or equal to 0
class PositiveNumber : public Validator {
public:
PositiveNumber() : Validator("POSITIVE") {
func_ = [](std::string &number_str) {
int number;
if(!detail::lexical_cast(number_str, number)) {
return "Failed parsing number " + number_str;
}
if(number < 0) {
return "Number less then 0 " + number_str;
}
return std::string();
};
}
};
/// Validate the argument is a number and greater than or equal to 0
class Number : public Validator {
public:
Number() : Validator("NUMBER") {
func_ = [](std::string &number_str) {
double number;
if(!detail::lexical_cast(number_str, number)) {
return "Failed parsing as a number " + number_str;
}
return std::string();
};
}
};
} // namespace detail
// Static is not needed here, because global const implies static.
/// Check for existing file (returns error message if check fails)
const detail::ExistingFileValidator ExistingFile;
/// Check for an existing directory (returns error message if check fails)
const detail::ExistingDirectoryValidator ExistingDirectory;
/// Check for an existing path
const detail::ExistingPathValidator ExistingPath;
/// Check for an non-existing path
const detail::NonexistentPathValidator NonexistentPath;
/// Check for an IP4 address
const detail::IPV4Validator ValidIPV4;
/// Check for a positive number
const detail::PositiveNumber PositiveNumber;
/// Check for a number
const detail::Number Number;
/// Produce a range (factory). Min and max are inclusive.
class Range : public Validator {
public:
/// This produces a range with min and max inclusive.
///
/// Note that the constructor is templated, but the struct is not, so C++17 is not
/// needed to provide nice syntax for Range(a,b).
template <typename T> Range(T min, T max) {
std::stringstream out;
out << detail::type_name<T>() << " in [" << min << " - " << max << "]";
description(out.str());
func_ = [min, max](std::string &input) {
T val;
bool converted = detail::lexical_cast(input, val);
if((!converted) || (val < min || val > max))
return "Value " + input + " not in range " + std::to_string(min) + " to " + std::to_string(max);
return std::string();
};
}
/// Range of one value is 0 to value
template <typename T> explicit Range(T max) : Range(static_cast<T>(0), max) {}
};
/// Produce a bounded range (factory). Min and max are inclusive.
class Bound : public Validator {
public:
/// This bounds a value with min and max inclusive.
///
/// Note that the constructor is templated, but the struct is not, so C++17 is not
/// needed to provide nice syntax for Range(a,b).
template <typename T> Bound(T min, T max) {
std::stringstream out;
out << detail::type_name<T>() << " bounded to [" << min << " - " << max << "]";
description(out.str());
func_ = [min, max](std::string &input) {
T val;
bool converted = detail::lexical_cast(input, val);
if(!converted) {
return "Value " + input + " could not be converted";
}
if(val < min)
input = detail::as_string(min);
else if(val > max)
input = detail::as_string(max);
return std::string();
};
}
/// Range of one value is 0 to value
template <typename T> explicit Bound(T max) : Bound(static_cast<T>(0), max) {}
};
namespace detail {
template <typename T,
enable_if_t<is_copyable_ptr<typename std::remove_reference<T>::type>::value, detail::enabler> = detail::dummy>
auto smart_deref(T value) -> decltype(*value) {
return *value;
}
template <
typename T,
enable_if_t<!is_copyable_ptr<typename std::remove_reference<T>::type>::value, detail::enabler> = detail::dummy>
typename std::remove_reference<T>::type &smart_deref(T &value) {
return value;
}
/// Generate a string representation of a set
template <typename T> std::string generate_set(const T &set) {
using element_t = typename detail::element_type<T>::type;
using iteration_type_t = typename detail::pair_adaptor<element_t>::value_type; // the type of the object pair
std::string out(1, '{');
out.append(detail::join(detail::smart_deref(set),
[](const iteration_type_t &v) { return detail::pair_adaptor<element_t>::first(v); },
","));
out.push_back('}');
return out;
}
/// Generate a string representation of a map
template <typename T> std::string generate_map(const T &map, bool key_only = false) {
using element_t = typename detail::element_type<T>::type;
using iteration_type_t = typename detail::pair_adaptor<element_t>::value_type; // the type of the object pair
std::string out(1, '{');
out.append(detail::join(detail::smart_deref(map),
[key_only](const iteration_type_t &v) {
auto res = detail::as_string(detail::pair_adaptor<element_t>::first(v));
if(!key_only) {
res += "->" + detail::as_string(detail::pair_adaptor<element_t>::second(v));
}
return res;
},
","));
out.push_back('}');
return out;
}
template <typename> struct sfinae_true : std::true_type {};
/// Function to check for the existence of a member find function which presumably is more efficient than looping over
/// everything
template <typename T, typename V>
static auto test_find(int) -> sfinae_true<decltype(std::declval<T>().find(std::declval<V>()))>;
template <typename, typename V> static auto test_find(long) -> std::false_type;
template <typename T, typename V> struct has_find : decltype(test_find<T, V>(0)) {};
/// A search function
template <typename T, typename V, enable_if_t<!has_find<T, V>::value, detail::enabler> = detail::dummy>
auto search(const T &set, const V &val) -> std::pair<bool, decltype(std::begin(detail::smart_deref(set)))> {
using element_t = typename detail::element_type<T>::type;
auto &setref = detail::smart_deref(set);
auto it = std::find_if(std::begin(setref), std::end(setref), [&val](decltype(*std::begin(setref)) v) {
return (detail::pair_adaptor<element_t>::first(v) == val);
});
return {(it != std::end(setref)), it};
}
/// A search function that uses the built in find function
template <typename T, typename V, enable_if_t<has_find<T, V>::value, detail::enabler> = detail::dummy>
auto search(const T &set, const V &val) -> std::pair<bool, decltype(std::begin(detail::smart_deref(set)))> {
auto &setref = detail::smart_deref(set);
auto it = setref.find(val);
return {(it != std::end(setref)), it};
}
/// A search function with a filter function
template <typename T, typename V>
auto search(const T &set, const V &val, const std::function<V(V)> &filter_function)
-> std::pair<bool, decltype(std::begin(detail::smart_deref(set)))> {
using element_t = typename detail::element_type<T>::type;
// do the potentially faster first search
auto res = search(set, val);
if((res.first) || (!(filter_function))) {
return res;
}
// if we haven't found it do the longer linear search with all the element translations
auto &setref = detail::smart_deref(set);
auto it = std::find_if(std::begin(setref), std::end(setref), [&](decltype(*std::begin(setref)) v) {
V a = detail::pair_adaptor<element_t>::first(v);
a = filter_function(a);
return (a == val);
});
return {(it != std::end(setref)), it};
}
/// Performs a *= b; if it doesn't cause integer overflow. Returns false otherwise.
template <typename T> typename std::enable_if<std::is_integral<T>::value, bool>::type checked_multiply(T &a, T b) {
if(a == 0 || b == 0) {
a *= b;
return true;
}
T c = a * b;
if(c / a != b) {
return false;
}
a = c;
return true;
}
/// Performs a *= b; if it doesn't equal infinity. Returns false otherwise.
template <typename T>
typename std::enable_if<std::is_floating_point<T>::value, bool>::type checked_multiply(T &a, T b) {
T c = a * b;
if(std::isinf(c) && !std::isinf(a) && !std::isinf(b)) {
return false;
}
a = c;
return true;
}
} // namespace detail
/// Verify items are in a set
class IsMember : public Validator {
public:
using filter_fn_t = std::function<std::string(std::string)>;
/// This allows in-place construction using an initializer list
template <typename T, typename... Args>
explicit IsMember(std::initializer_list<T> values, Args &&... args)
: IsMember(std::vector<T>(values), std::forward<Args>(args)...) {}
/// This checks to see if an item is in a set (empty function)
template <typename T> explicit IsMember(T &&set) : IsMember(std::forward<T>(set), nullptr) {}
/// This checks to see if an item is in a set: pointer or copy version. You can pass in a function that will filter
/// both sides of the comparison before computing the comparison.
template <typename T, typename F> explicit IsMember(T set, F filter_function) {
// Get the type of the contained item - requires a container have ::value_type
// if the type does not have first_type and second_type, these are both value_type
using element_t = typename detail::element_type<T>::type; // Removes (smart) pointers if needed
using item_t = typename detail::pair_adaptor<element_t>::first_type; // Is value_type if not a map
using local_item_t = typename IsMemberType<item_t>::type; // This will convert bad types to good ones
// (const char * to std::string)
// Make a local copy of the filter function, using a std::function if not one already
std::function<local_item_t(local_item_t)> filter_fn = filter_function;
// This is the type name for help, it will take the current version of the set contents
desc_function_ = [set]() { return detail::generate_set(detail::smart_deref(set)); };
// This is the function that validates
// It stores a copy of the set pointer-like, so shared_ptr will stay alive
func_ = [set, filter_fn](std::string &input) {
local_item_t b;
if(!detail::lexical_cast(input, b)) {
throw ValidationError(input); // name is added later
}
if(filter_fn) {
b = filter_fn(b);
}
auto res = detail::search(set, b, filter_fn);
if(res.first) {
// Make sure the version in the input string is identical to the one in the set
if(filter_fn) {
input = detail::as_string(detail::pair_adaptor<element_t>::first(*(res.second)));
}
// Return empty error string (success)
return std::string{};
}
// If you reach this point, the result was not found
std::string out(" not in ");
out += detail::generate_set(detail::smart_deref(set));
return out;
};
}
/// You can pass in as many filter functions as you like, they nest (string only currently)
template <typename T, typename... Args>
IsMember(T &&set, filter_fn_t filter_fn_1, filter_fn_t filter_fn_2, Args &&... other)
: IsMember(std::forward<T>(set),
[filter_fn_1, filter_fn_2](std::string a) { return filter_fn_2(filter_fn_1(a)); },
other...) {}
};
/// definition of the default transformation object
template <typename T> using TransformPairs = std::vector<std::pair<std::string, T>>;
/// Translate named items to other or a value set
class Transformer : public Validator {
public:
using filter_fn_t = std::function<std::string(std::string)>;
/// This allows in-place construction
template <typename... Args>
explicit Transformer(std::initializer_list<std::pair<std::string, std::string>> values, Args &&... args)
: Transformer(TransformPairs<std::string>(values), std::forward<Args>(args)...) {}
/// direct map of std::string to std::string
template <typename T> explicit Transformer(T &&mapping) : Transformer(std::forward<T>(mapping), nullptr) {}
/// This checks to see if an item is in a set: pointer or copy version. You can pass in a function that will filter
/// both sides of the comparison before computing the comparison.
template <typename T, typename F> explicit Transformer(T mapping, F filter_function) {
static_assert(detail::pair_adaptor<typename detail::element_type<T>::type>::value,
"mapping must produce value pairs");
// Get the type of the contained item - requires a container have ::value_type
// if the type does not have first_type and second_type, these are both value_type
using element_t = typename detail::element_type<T>::type; // Removes (smart) pointers if needed
using item_t = typename detail::pair_adaptor<element_t>::first_type; // Is value_type if not a map
using local_item_t = typename IsMemberType<item_t>::type; // This will convert bad types to good ones
// (const char * to std::string)
// Make a local copy of the filter function, using a std::function if not one already
std::function<local_item_t(local_item_t)> filter_fn = filter_function;
// This is the type name for help, it will take the current version of the set contents
desc_function_ = [mapping]() { return detail::generate_map(detail::smart_deref(mapping)); };
func_ = [mapping, filter_fn](std::string &input) {
local_item_t b;
if(!detail::lexical_cast(input, b)) {
return std::string();
// there is no possible way we can match anything in the mapping if we can't convert so just return
}
if(filter_fn) {
b = filter_fn(b);
}
auto res = detail::search(mapping, b, filter_fn);
if(res.first) {
input = detail::as_string(detail::pair_adaptor<element_t>::second(*res.second));
}
return std::string{};
};
}
/// You can pass in as many filter functions as you like, they nest
template <typename T, typename... Args>
Transformer(T &&mapping, filter_fn_t filter_fn_1, filter_fn_t filter_fn_2, Args &&... other)
: Transformer(std::forward<T>(mapping),
[filter_fn_1, filter_fn_2](std::string a) { return filter_fn_2(filter_fn_1(a)); },
other...) {}
};
/// translate named items to other or a value set
class CheckedTransformer : public Validator {
public:
using filter_fn_t = std::function<std::string(std::string)>;
/// This allows in-place construction
template <typename... Args>
explicit CheckedTransformer(std::initializer_list<std::pair<std::string, std::string>> values, Args &&... args)
: CheckedTransformer(TransformPairs<std::string>(values), std::forward<Args>(args)...) {}
/// direct map of std::string to std::string
template <typename T> explicit CheckedTransformer(T mapping) : CheckedTransformer(std::move(mapping), nullptr) {}
/// This checks to see if an item is in a set: pointer or copy version. You can pass in a function that will filter
/// both sides of the comparison before computing the comparison.
template <typename T, typename F> explicit CheckedTransformer(T mapping, F filter_function) {
static_assert(detail::pair_adaptor<typename detail::element_type<T>::type>::value,
"mapping must produce value pairs");
// Get the type of the contained item - requires a container have ::value_type
// if the type does not have first_type and second_type, these are both value_type
using element_t = typename detail::element_type<T>::type; // Removes (smart) pointers if needed
using item_t = typename detail::pair_adaptor<element_t>::first_type; // Is value_type if not a map
using local_item_t = typename IsMemberType<item_t>::type; // This will convert bad types to good ones
// (const char * to std::string)
using iteration_type_t = typename detail::pair_adaptor<element_t>::value_type; // the type of the object pair //
// the type of the object pair
// Make a local copy of the filter function, using a std::function if not one already
std::function<local_item_t(local_item_t)> filter_fn = filter_function;
auto tfunc = [mapping]() {
std::string out("value in ");
out += detail::generate_map(detail::smart_deref(mapping)) + " OR {";
out += detail::join(
detail::smart_deref(mapping),
[](const iteration_type_t &v) { return detail::as_string(detail::pair_adaptor<element_t>::second(v)); },
",");
out.push_back('}');
return out;
};
desc_function_ = tfunc;
func_ = [mapping, tfunc, filter_fn](std::string &input) {
local_item_t b;
bool converted = detail::lexical_cast(input, b);
if(converted) {
if(filter_fn) {
b = filter_fn(b);
}
auto res = detail::search(mapping, b, filter_fn);
if(res.first) {
input = detail::as_string(detail::pair_adaptor<element_t>::second(*res.second));
return std::string{};
}
}
for(const auto &v : detail::smart_deref(mapping)) {
auto output_string = detail::as_string(detail::pair_adaptor<element_t>::second(v));
if(output_string == input) {
return std::string();
}
}
return "Check " + input + " " + tfunc() + " FAILED";
};
}
/// You can pass in as many filter functions as you like, they nest
template <typename T, typename... Args>
CheckedTransformer(T &&mapping, filter_fn_t filter_fn_1, filter_fn_t filter_fn_2, Args &&... other)
: CheckedTransformer(std::forward<T>(mapping),
[filter_fn_1, filter_fn_2](std::string a) { return filter_fn_2(filter_fn_1(a)); },
other...) {}
};
/// Helper function to allow ignore_case to be passed to IsMember or Transform
inline std::string ignore_case(std::string item) { return detail::to_lower(item); }
/// Helper function to allow ignore_underscore to be passed to IsMember or Transform
inline std::string ignore_underscore(std::string item) { return detail::remove_underscore(item); }
/// Helper function to allow checks to ignore spaces to be passed to IsMember or Transform
inline std::string ignore_space(std::string item) {
item.erase(std::remove(std::begin(item), std::end(item), ' '), std::end(item));
item.erase(std::remove(std::begin(item), std::end(item), '\t'), std::end(item));
return item;
}
/// Multiply a number by a factor using given mapping.
/// Can be used to write transforms for SIZE or DURATION inputs.
///
/// Example:
/// With mapping = `{"b"->1, "kb"->1024, "mb"->1024*1024}`
/// one can recognize inputs like "100", "12kb", "100 MB",
/// that will be automatically transformed to 100, 14448, 104857600.
///
/// Output number type matches the type in the provided mapping.
/// Therefore, if it is required to interpret real inputs like "0.42 s",
/// the mapping should be of a type <string, float> or <string, double>.
class AsNumberWithUnit : public Validator {
public:
/// Adjust AsNumberWithUnit behavior.
/// CASE_SENSITIVE/CASE_INSENSITIVE controls how units are matched.
/// UNIT_OPTIONAL/UNIT_REQUIRED throws ValidationError
/// if UNIT_REQUIRED is set and unit literal is not found.
enum Options {
CASE_SENSITIVE = 0,
CASE_INSENSITIVE = 1,
UNIT_OPTIONAL = 0,
UNIT_REQUIRED = 2,
DEFAULT = CASE_INSENSITIVE | UNIT_OPTIONAL
};
template <typename Number>
explicit AsNumberWithUnit(std::map<std::string, Number> mapping,
Options opts = DEFAULT,
const std::string &unit_name = "UNIT") {
description(generate_description<Number>(unit_name, opts));
validate_mapping(mapping, opts);
// transform function
func_ = [mapping, opts](std::string &input) -> std::string {
Number num;
detail::rtrim(input);
if(input.empty()) {
throw ValidationError("Input is empty");
}
// Find split position between number and prefix
auto unit_begin = input.end();
while(unit_begin > input.begin() && std::isalpha(*(unit_begin - 1), std::locale())) {
--unit_begin;
}
std::string unit{unit_begin, input.end()};
input.resize(static_cast<size_t>(std::distance(input.begin(), unit_begin)));
detail::trim(input);
if(opts & UNIT_REQUIRED && unit.empty()) {
throw ValidationError("Missing mandatory unit");
}
if(opts & CASE_INSENSITIVE) {
unit = detail::to_lower(unit);
}
bool converted = detail::lexical_cast(input, num);
if(!converted) {
throw ValidationError("Value " + input + " could not be converted to " + detail::type_name<Number>());
}
if(unit.empty()) {
// No need to modify input if no unit passed
return {};
}
// find corresponding factor
auto it = mapping.find(unit);
if(it == mapping.end()) {
throw ValidationError(unit +
" unit not recognized. "
"Allowed values: " +
detail::generate_map(mapping, true));
}
// perform safe multiplication
bool ok = detail::checked_multiply(num, it->second);
if(!ok) {
throw ValidationError(detail::as_string(num) + " multiplied by " + unit +
" factor would cause number overflow. Use smaller value.");
}
input = detail::as_string(num);
return {};
};
}
private:
/// Check that mapping contains valid units.
/// Update mapping for CASE_INSENSITIVE mode.
template <typename Number> static void validate_mapping(std::map<std::string, Number> &mapping, Options opts) {
for(auto &kv : mapping) {
if(kv.first.empty()) {
throw ValidationError("Unit must not be empty.");
}
if(!detail::isalpha(kv.first)) {
throw ValidationError("Unit must contain only letters.");
}
}
// make all units lowercase if CASE_INSENSITIVE
if(opts & CASE_INSENSITIVE) {
std::map<std::string, Number> lower_mapping;
for(auto &kv : mapping) {
auto s = detail::to_lower(kv.first);
if(lower_mapping.count(s)) {
throw ValidationError("Several matching lowercase unit representations are found: " + s);
}
lower_mapping[detail::to_lower(kv.first)] = kv.second;
}
mapping = std::move(lower_mapping);
}
}
/// Generate description like this: NUMBER [UNIT]
template <typename Number> static std::string generate_description(const std::string &name, Options opts) {
std::stringstream out;
out << detail::type_name<Number>() << ' ';
if(opts & UNIT_REQUIRED) {
out << name;
} else {
out << '[' << name << ']';
}
return out.str();
}
};
/// Converts a human-readable size string (with unit literal) to uin64_t size.
/// Example:
/// "100" => 100
/// "1 b" => 100
/// "10Kb" => 10240 // you can configure this to be interpreted as kilobyte (*1000) or kibibyte (*1024)
/// "10 KB" => 10240
/// "10 kb" => 10240
/// "10 kib" => 10240 // *i, *ib are always interpreted as *bibyte (*1024)
/// "10kb" => 10240
/// "2 MB" => 2097152
/// "2 EiB" => 2^61 // Units up to exibyte are supported
class AsSizeValue : public AsNumberWithUnit {
public:
using result_t = uint64_t;
/// If kb_is_1000 is true,
/// interpret 'kb', 'k' as 1000 and 'kib', 'ki' as 1024
/// (same applies to higher order units as well).
/// Otherwise, interpret all literals as factors of 1024.
/// The first option is formally correct, but
/// the second interpretation is more wide-spread
/// (see https://en.wikipedia.org/wiki/Binary_prefix).
explicit AsSizeValue(bool kb_is_1000) : AsNumberWithUnit(get_mapping(kb_is_1000)) {
if(kb_is_1000) {
description("SIZE [b, kb(=1000b), kib(=1024b), ...]");
} else {
description("SIZE [b, kb(=1024b), ...]");
}
}
private:
/// Get <size unit, factor> mapping
static std::map<std::string, result_t> init_mapping(bool kb_is_1000) {
std::map<std::string, result_t> m;
result_t k_factor = kb_is_1000 ? 1000 : 1024;
result_t ki_factor = 1024;
result_t k = 1;
result_t ki = 1;
m["b"] = 1;
for(std::string p : {"k", "m", "g", "t", "p", "e"}) {
k *= k_factor;
ki *= ki_factor;
m[p] = k;
m[p + "b"] = k;
m[p + "i"] = ki;
m[p + "ib"] = ki;
}
return m;
}
/// Cache calculated mapping
static std::map<std::string, result_t> get_mapping(bool kb_is_1000) {
if(kb_is_1000) {
static auto m = init_mapping(true);
return m;
} else {
static auto m = init_mapping(false);
return m;
}
}
};
namespace detail {
/// Split a string into a program name and command line arguments
/// the string is assumed to contain a file name followed by other arguments
/// the return value contains is a pair with the first argument containing the program name and the second
/// everything else.
inline std::pair<std::string, std::string> split_program_name(std::string commandline) {
// try to determine the programName
std::pair<std::string, std::string> vals;
trim(commandline);
auto esp = commandline.find_first_of(' ', 1);
while(!ExistingFile(commandline.substr(0, esp)).empty()) {
esp = commandline.find_first_of(' ', esp + 1);
if(esp == std::string::npos) {
// if we have reached the end and haven't found a valid file just assume the first argument is the
// program name
esp = commandline.find_first_of(' ', 1);
break;
}
}
vals.first = commandline.substr(0, esp);
rtrim(vals.first);
// strip the program name
vals.second = (esp != std::string::npos) ? commandline.substr(esp + 1) : std::string{};
ltrim(vals.second);
return vals;
}
} // namespace detail
/// @}
} // namespace CLI
// From CLI/FormatterFwd.hpp:
namespace CLI {
class Option;
class App;
/// This enum signifies the type of help requested
///
/// This is passed in by App; all user classes must accept this as
/// the second argument.
enum class AppFormatMode {
Normal, //< The normal, detailed help
All, //< A fully expanded help
Sub, //< Used when printed as part of expanded subcommand
};
/// This is the minimum requirements to run a formatter.
///
/// A user can subclass this is if they do not care at all
/// about the structure in CLI::Formatter.
class FormatterBase {
protected:
/// @name Options
///@{
/// The width of the first column
size_t column_width_{30};
/// @brief The required help printout labels (user changeable)
/// Values are Needs, Excludes, etc.
std::map<std::string, std::string> labels_;
///@}
/// @name Basic
///@{
public:
FormatterBase() = default;
FormatterBase(const FormatterBase &) = default;
FormatterBase(FormatterBase &&) = default;
/// Adding a destructor in this form to work around bug in GCC 4.7
virtual ~FormatterBase() noexcept {} // NOLINT(modernize-use-equals-default)
/// This is the key method that puts together help
virtual std::string make_help(const App *, std::string, AppFormatMode) const = 0;
///@}
/// @name Setters
///@{
/// Set the "REQUIRED" label
void label(std::string key, std::string val) { labels_[key] = val; }
/// Set the column width
void column_width(size_t val) { column_width_ = val; }
///@}
/// @name Getters
///@{
/// Get the current value of a name (REQUIRED, etc.)
std::string get_label(std::string key) const {
if(labels_.find(key) == labels_.end())
return key;
else
return labels_.at(key);
}
/// Get the current column width
size_t get_column_width() const { return column_width_; }
///@}
};
/// This is a specialty override for lambda functions
class FormatterLambda final : public FormatterBase {
using funct_t = std::function<std::string(const App *, std::string, AppFormatMode)>;
/// The lambda to hold and run
funct_t lambda_;
public:
/// Create a FormatterLambda with a lambda function
explicit FormatterLambda(funct_t funct) : lambda_(std::move(funct)) {}
/// Adding a destructor (mostly to make GCC 4.7 happy)
~FormatterLambda() noexcept override {} // NOLINT(modernize-use-equals-default)
/// This will simply call the lambda function
std::string make_help(const App *app, std::string name, AppFormatMode mode) const override {
return lambda_(app, name, mode);
}
};
/// This is the default Formatter for CLI11. It pretty prints help output, and is broken into quite a few
/// overridable methods, to be highly customizable with minimal effort.
class Formatter : public FormatterBase {
public:
Formatter() = default;
Formatter(const Formatter &) = default;
Formatter(Formatter &&) = default;
/// @name Overridables
///@{
/// This prints out a group of options with title
///
virtual std::string make_group(std::string group, bool is_positional, std::vector<const Option *> opts) const;
/// This prints out just the positionals "group"
virtual std::string make_positionals(const App *app) const;
/// This prints out all the groups of options
std::string make_groups(const App *app, AppFormatMode mode) const;
/// This prints out all the subcommands
virtual std::string make_subcommands(const App *app, AppFormatMode mode) const;
/// This prints out a subcommand
virtual std::string make_subcommand(const App *sub) const;
/// This prints out a subcommand in help-all
virtual std::string make_expanded(const App *sub) const;
/// This prints out all the groups of options
virtual std::string make_footer(const App *app) const;
/// This displays the description line
virtual std::string make_description(const App *app) const;
/// This displays the usage line
virtual std::string make_usage(const App *app, std::string name) const;
/// This puts everything together
std::string make_help(const App *, std::string, AppFormatMode) const override;
///@}
/// @name Options
///@{
/// This prints out an option help line, either positional or optional form
virtual std::string make_option(const Option *opt, bool is_positional) const {
std::stringstream out;
detail::format_help(
out, make_option_name(opt, is_positional) + make_option_opts(opt), make_option_desc(opt), column_width_);
return out.str();
}
/// @brief This is the name part of an option, Default: left column
virtual std::string make_option_name(const Option *, bool) const;
/// @brief This is the options part of the name, Default: combined into left column
virtual std::string make_option_opts(const Option *) const;
/// @brief This is the description. Default: Right column, on new line if left column too large
virtual std::string make_option_desc(const Option *) const;
/// @brief This is used to print the name on the USAGE line
virtual std::string make_option_usage(const Option *opt) const;
///@}
};
} // namespace CLI
// From CLI/Option.hpp:
namespace CLI {
using results_t = std::vector<std::string>;
using callback_t = std::function<bool(results_t)>;
class Option;
class App;
using Option_p = std::unique_ptr<Option>;
enum class MultiOptionPolicy : char { Throw, TakeLast, TakeFirst, Join };
/// This is the CRTP base class for Option and OptionDefaults. It was designed this way
/// to share parts of the class; an OptionDefaults can copy to an Option.
template <typename CRTP> class OptionBase {
friend App;
protected:
/// The group membership
std::string group_ = std::string("Options");
/// True if this is a required option
bool required_{false};
/// Ignore the case when matching (option, not value)
bool ignore_case_{false};
/// Ignore underscores when matching (option, not value)
bool ignore_underscore_{false};
/// Allow this option to be given in a configuration file
bool configurable_{true};
/// Disable overriding flag values with '=value'
bool disable_flag_override_{false};
/// Specify a delimiter character for vector arguments
char delimiter_{'\0'};
/// Automatically capture default value
bool always_capture_default_{false};
/// Policy for multiple arguments when `expected_ == 1` (can be set on bool flags, too)
MultiOptionPolicy multi_option_policy_{MultiOptionPolicy::Throw};
/// Copy the contents to another similar class (one based on OptionBase)
template <typename T> void copy_to(T *other) const {
other->group(group_);
other->required(required_);
other->ignore_case(ignore_case_);
other->ignore_underscore(ignore_underscore_);
other->configurable(configurable_);
other->disable_flag_override(disable_flag_override_);
other->delimiter(delimiter_);
other->always_capture_default(always_capture_default_);
other->multi_option_policy(multi_option_policy_);
}
public:
// setters
/// Changes the group membership
CRTP *group(std::string name) {
group_ = name;
return static_cast<CRTP *>(this);
}
/// Set the option as required
CRTP *required(bool value = true) {
required_ = value;
return static_cast<CRTP *>(this);
}
/// Support Plumbum term
CRTP *mandatory(bool value = true) { return required(value); }
CRTP *always_capture_default(bool value = true) {
always_capture_default_ = value;
return static_cast<CRTP *>(this);
}
// Getters
/// Get the group of this option
const std::string &get_group() const { return group_; }
/// True if this is a required option
bool get_required() const { return required_; }
/// The status of ignore case
bool get_ignore_case() const { return ignore_case_; }
/// The status of ignore_underscore
bool get_ignore_underscore() const { return ignore_underscore_; }
/// The status of configurable
bool get_configurable() const { return configurable_; }
/// The status of configurable
bool get_disable_flag_override() const { return disable_flag_override_; }
/// Get the current delimeter char
char get_delimiter() const { return delimiter_; }
/// Return true if this will automatically capture the default value for help printing
bool get_always_capture_default() const { return always_capture_default_; }
/// The status of the multi option policy
MultiOptionPolicy get_multi_option_policy() const { return multi_option_policy_; }
// Shortcuts for multi option policy
/// Set the multi option policy to take last
CRTP *take_last() {
auto self = static_cast<CRTP *>(this);
self->multi_option_policy(MultiOptionPolicy::TakeLast);
return self;
}
/// Set the multi option policy to take last
CRTP *take_first() {
auto self = static_cast<CRTP *>(this);
self->multi_option_policy(MultiOptionPolicy::TakeFirst);
return self;
}
/// Set the multi option policy to take last
CRTP *join() {
auto self = static_cast<CRTP *>(this);
self->multi_option_policy(MultiOptionPolicy::Join);
return self;
}
/// Allow in a configuration file
CRTP *configurable(bool value = true) {
configurable_ = value;
return static_cast<CRTP *>(this);
}
/// Allow in a configuration file
CRTP *delimiter(char value = '\0') {
delimiter_ = value;
return static_cast<CRTP *>(this);
}
};
/// This is a version of OptionBase that only supports setting values,
/// for defaults. It is stored as the default option in an App.
class OptionDefaults : public OptionBase<OptionDefaults> {
public:
OptionDefaults() = default;
// Methods here need a different implementation if they are Option vs. OptionDefault
/// Take the last argument if given multiple times
OptionDefaults *multi_option_policy(MultiOptionPolicy value = MultiOptionPolicy::Throw) {
multi_option_policy_ = value;
return this;
}
/// Ignore the case of the option name
OptionDefaults *ignore_case(bool value = true) {
ignore_case_ = value;
return this;
}
/// Ignore underscores in the option name
OptionDefaults *ignore_underscore(bool value = true) {
ignore_underscore_ = value;
return this;
}
/// Disable overriding flag values with an '=<value>' segment
OptionDefaults *disable_flag_override(bool value = true) {
disable_flag_override_ = value;
return this;
}
/// set a delimiter character to split up single arguments to treat as multiple inputs
OptionDefaults *delimiter(char value = '\0') {
delimiter_ = value;
return this;
}
};
class Option : public OptionBase<Option> {
friend App;
protected:
/// @name Names
///@{
/// A list of the short names (`-a`) without the leading dashes
std::vector<std::string> snames_;
/// A list of the long names (`--a`) without the leading dashes
std::vector<std::string> lnames_;
/// A list of the flag names with the appropriate default value, the first part of the pair should be duplicates of
/// what is in snames or lnames but will trigger a particular response on a flag
std::vector<std::pair<std::string, std::string>> default_flag_values_;
/// a list of flag names with specified default values;
std::vector<std::string> fnames_;
/// A positional name
std::string pname_;
/// If given, check the environment for this option
std::string envname_;
///@}
/// @name Help
///@{
/// The description for help strings
std::string description_;
/// A human readable default value, either manually set, captured, or captured by default
std::string default_str_;
/// A human readable type value, set when App creates this
///
/// This is a lambda function so "types" can be dynamic, such as when a set prints its contents.
std::function<std::string()> type_name_{[]() { return std::string(); }};
/// Run this function to capture a default (ignore if empty)
std::function<std::string()> default_function_;
///@}
/// @name Configuration
///@{
/// The number of arguments that make up one option. -1=unlimited (vector-like), 0=flag, 1=normal option,
/// 2=complex/pair, etc. Set only when the option is created; this is intrinsic to the type. Eventually, -2 may mean
/// vector of pairs.
int type_size_{1};
/// The number of expected values, type_size_ must be < 0. Ignored for flag. N < 0 means at least -N values.
int expected_{1};
/// A list of validators to run on each value parsed
std::vector<Validator> validators_;
/// A list of options that are required with this option
std::set<Option *> needs_;
/// A list of options that are excluded with this option
std::set<Option *> excludes_;
///@}
/// @name Other
///@{
/// Remember the parent app
App *parent_;
/// Options store a callback to do all the work
callback_t callback_;
///@}
/// @name Parsing results
///@{
/// Results of parsing
results_t results_;
/// Whether the callback has run (needed for INI parsing)
bool callback_run_{false};
///@}
/// Making an option by hand is not defined, it must be made by the App class
Option(std::string option_name,
std::string option_description,
std::function<bool(results_t)> callback,
App *parent)
: description_(std::move(option_description)), parent_(parent), callback_(std::move(callback)) {
std::tie(snames_, lnames_, pname_) = detail::get_names(detail::split_names(option_name));
}
public:
/// @name Basic
///@{
/// Count the total number of times an option was passed
size_t count() const { return results_.size(); }
/// True if the option was not passed
size_t empty() const { return results_.empty(); }
/// This class is true if option is passed.
operator bool() const { return !empty(); }
/// Clear the parsed results (mostly for testing)
void clear() { results_.clear(); }
///@}
/// @name Setting options
///@{
/// Set the number of expected arguments (Flags don't use this)
Option *expected(int value) {
// Break if this is a flag
if(type_size_ == 0)
throw IncorrectConstruction::SetFlag(get_name(true, true));
// Setting 0 is not allowed
else if(value == 0)
throw IncorrectConstruction::Set0Opt(get_name());
// No change is okay, quit now
else if(expected_ == value)
return this;
// Type must be a vector
else if(type_size_ >= 0)
throw IncorrectConstruction::ChangeNotVector(get_name());
// TODO: Can support multioption for non-1 values (except for join)
else if(value != 1 && multi_option_policy_ != MultiOptionPolicy::Throw)
throw IncorrectConstruction::AfterMultiOpt(get_name());
expected_ = value;
return this;
}
/// Adds a Validator with a built in type name
Option *check(Validator validator, std::string validator_name = "") {
validator.non_modifying();
validators_.push_back(std::move(validator));
if(!validator_name.empty())
validators_.front().name(validator_name);
return this;
}
/// Adds a Validator. Takes a const string& and returns an error message (empty if conversion/check is okay).
Option *check(std::function<std::string(const std::string &)> validator,
std::string validator_description = "",
std::string validator_name = "") {
validators_.emplace_back(validator, std::move(validator_description), std::move(validator_name));
validators_.back().non_modifying();
return this;
}
/// Adds a transforming validator with a built in type name
Option *transform(Validator validator, std::string validator_name = "") {
validators_.insert(validators_.begin(), std::move(validator));
if(!validator_name.empty())
validators_.front().name(validator_name);
return this;
}
/// Adds a validator-like function that can change result
Option *transform(std::function<std::string(std::string)> func,
std::string transform_description = "",
std::string transform_name = "") {
validators_.insert(validators_.begin(),
Validator(
[func](std::string &val) {
val = func(val);
return std::string{};
},
std::move(transform_description),
std::move(transform_name)));
return this;
}
/// Adds a user supplied function to run on each item passed in (communicate though lambda capture)
Option *each(std::function<void(std::string)> func) {
validators_.emplace_back(
[func](std::string &inout) {
func(inout);
return std::string{};
},
std::string{});
return this;
}
/// Get a named Validator
Validator *get_validator(const std::string &validator_name = "") {
for(auto &validator : validators_) {
if(validator_name == validator.get_name()) {
return &validator;
}
}
if((validator_name.empty()) && (!validators_.empty())) {
return &(validators_.front());
}
throw OptionNotFound(std::string("Validator ") + validator_name + " Not Found");
}
/// Sets required options
Option *needs(Option *opt) {
auto tup = needs_.insert(opt);
if(!tup.second)
throw OptionAlreadyAdded::Requires(get_name(), opt->get_name());
return this;
}
/// Can find a string if needed
template <typename T = App> Option *needs(std::string opt_name) {
for(const Option_p &opt : dynamic_cast<T *>(parent_)->options_)
if(opt.get() != this && opt->check_name(opt_name))
return needs(opt.get());
throw IncorrectConstruction::MissingOption(opt_name);
}
/// Any number supported, any mix of string and Opt
template <typename A, typename B, typename... ARG> Option *needs(A opt, B opt1, ARG... args) {
needs(opt);
return needs(opt1, args...);
}
/// Remove needs link from an option. Returns true if the option really was in the needs list.
bool remove_needs(Option *opt) {
auto iterator = std::find(std::begin(needs_), std::end(needs_), opt);
if(iterator != std::end(needs_)) {
needs_.erase(iterator);
return true;
} else {
return false;
}
}
/// Sets excluded options
Option *excludes(Option *opt) {
excludes_.insert(opt);
// Help text should be symmetric - excluding a should exclude b
opt->excludes_.insert(this);
// Ignoring the insert return value, excluding twice is now allowed.
// (Mostly to allow both directions to be excluded by user, even though the library does it for you.)
return this;
}
/// Can find a string if needed
template <typename T = App> Option *excludes(std::string opt_name) {
for(const Option_p &opt : dynamic_cast<T *>(parent_)->options_)
if(opt.get() != this && opt->check_name(opt_name))
return excludes(opt.get());
throw IncorrectConstruction::MissingOption(opt_name);
}
/// Any number supported, any mix of string and Opt
template <typename A, typename B, typename... ARG> Option *excludes(A opt, B opt1, ARG... args) {
excludes(opt);
return excludes(opt1, args...);
}
/// Remove needs link from an option. Returns true if the option really was in the needs list.
bool remove_excludes(Option *opt) {
auto iterator = std::find(std::begin(excludes_), std::end(excludes_), opt);
if(iterator != std::end(excludes_)) {
excludes_.erase(iterator);
return true;
} else {
return false;
}
}
/// Sets environment variable to read if no option given
Option *envname(std::string name) {
envname_ = name;
return this;
}
/// Ignore case
///
/// The template hides the fact that we don't have the definition of App yet.
/// You are never expected to add an argument to the template here.
template <typename T = App> Option *ignore_case(bool value = true) {
ignore_case_ = value;
auto *parent = dynamic_cast<T *>(parent_);
for(const Option_p &opt : parent->options_)
if(opt.get() != this && *opt == *this)
throw OptionAlreadyAdded(opt->get_name(true, true));
return this;
}
/// Ignore underscores in the option names
///
/// The template hides the fact that we don't have the definition of App yet.
/// You are never expected to add an argument to the template here.
template <typename T = App> Option *ignore_underscore(bool value = true) {
ignore_underscore_ = value;
auto *parent = dynamic_cast<T *>(parent_);
for(const Option_p &opt : parent->options_)
if(opt.get() != this && *opt == *this)
throw OptionAlreadyAdded(opt->get_name(true, true));
return this;
}
/// Take the last argument if given multiple times (or another policy)
Option *multi_option_policy(MultiOptionPolicy value = MultiOptionPolicy::Throw) {
if(get_items_expected() < 0)
throw IncorrectConstruction::MultiOptionPolicy(get_name());
multi_option_policy_ = value;
return this;
}
/// disable flag overrides
Option *disable_flag_override(bool value = true) {
disable_flag_override_ = value;
return this;
}
///@}
/// @name Accessors
///@{
/// The number of arguments the option expects
int get_type_size() const { return type_size_; }
/// The environment variable associated to this value
std::string get_envname() const { return envname_; }
/// The set of options needed
std::set<Option *> get_needs() const { return needs_; }
/// The set of options excluded
std::set<Option *> get_excludes() const { return excludes_; }
/// The default value (for help printing) DEPRECATED Use get_default_str() instead
CLI11_DEPRECATED("Use get_default_str() instead")
std::string get_defaultval() const { return default_str_; }
/// The default value (for help printing)
std::string get_default_str() const { return default_str_; }
/// Get the callback function
callback_t get_callback() const { return callback_; }
/// Get the long names
const std::vector<std::string> get_lnames() const { return lnames_; }
/// Get the short names
const std::vector<std::string> get_snames() const { return snames_; }
/// get the flag names with specified default values
const std::vector<std::string> get_fnames() const { return fnames_; }
/// The number of times the option expects to be included
int get_expected() const { return expected_; }
/// \brief The total number of expected values (including the type)
/// This is positive if exactly this number is expected, and negative for at least N values
///
/// v = fabs(size_type*expected)
/// !MultiOptionPolicy::Throw
/// | Expected < 0 | Expected == 0 | Expected > 0
/// Size < 0 | -v | 0 | -v
/// Size == 0 | 0 | 0 | 0
/// Size > 0 | -v | 0 | -v // Expected must be 1
///
/// MultiOptionPolicy::Throw
/// | Expected < 0 | Expected == 0 | Expected > 0
/// Size < 0 | -v | 0 | v
/// Size == 0 | 0 | 0 | 0
/// Size > 0 | v | 0 | v // Expected must be 1
///
int get_items_expected() const {
return std::abs(type_size_ * expected_) *
((multi_option_policy_ != MultiOptionPolicy::Throw || (expected_ < 0 && type_size_ < 0) ? -1 : 1));
}
/// True if the argument can be given directly
bool get_positional() const { return pname_.length() > 0; }
/// True if option has at least one non-positional name
bool nonpositional() const { return (snames_.size() + lnames_.size()) > 0; }
/// True if option has description
bool has_description() const { return description_.length() > 0; }
/// Get the description
const std::string &get_description() const { return description_; }
/// Set the description
Option *description(std::string option_description) {
description_ = std::move(option_description);
return this;
}
///@}
/// @name Help tools
///@{
/// \brief Gets a comma separated list of names.
/// Will include / prefer the positional name if positional is true.
/// If all_options is false, pick just the most descriptive name to show.
/// Use `get_name(true)` to get the positional name (replaces `get_pname`)
std::string get_name(bool positional = false, //<[input] Show the positional name
bool all_options = false //<[input] Show every option
) const {
if(all_options) {
std::vector<std::string> name_list;
/// The all list will never include a positional unless asked or that's the only name.
if((positional && pname_.length()) || (snames_.empty() && lnames_.empty()))
name_list.push_back(pname_);
if((get_items_expected() == 0) && (!fnames_.empty())) {
for(const std::string &sname : snames_) {
name_list.push_back("-" + sname);
if(check_fname(sname)) {
name_list.back() += "{" + get_flag_value(sname, "") + "}";
}
}
for(const std::string &lname : lnames_) {
name_list.push_back("--" + lname);
if(check_fname(lname)) {
name_list.back() += "{" + get_flag_value(lname, "") + "}";
}
}
} else {
for(const std::string &sname : snames_)
name_list.push_back("-" + sname);
for(const std::string &lname : lnames_)
name_list.push_back("--" + lname);
}
return detail::join(name_list);
} else {
// This returns the positional name no matter what
if(positional)
return pname_;
// Prefer long name
else if(!lnames_.empty())
return std::string("--") + lnames_[0];
// Or short name if no long name
else if(!snames_.empty())
return std::string("-") + snames_[0];
// If positional is the only name, it's okay to use that
else
return pname_;
}
}
///@}
/// @name Parser tools
///@{
/// Process the callback
void run_callback() {
callback_run_ = true;
// Run the validators (can change the string)
if(!validators_.empty()) {
for(std::string &result : results_) {
auto err_msg = _validate(result);
if(!err_msg.empty())
throw ValidationError(get_name(), err_msg);
}
}
if(!(callback_)) {
return;
}
bool local_result;
// Num items expected or length of vector, always at least 1
// Only valid for a trimming policy
int trim_size =
std::min<int>(std::max<int>(std::abs(get_items_expected()), 1), static_cast<int>(results_.size()));
// Operation depends on the policy setting
if(multi_option_policy_ == MultiOptionPolicy::TakeLast) {
// Allow multi-option sizes (including 0)
results_t partial_result{results_.end() - trim_size, results_.end()};
local_result = !callback_(partial_result);
} else if(multi_option_policy_ == MultiOptionPolicy::TakeFirst) {
results_t partial_result{results_.begin(), results_.begin() + trim_size};
local_result = !callback_(partial_result);
} else if(multi_option_policy_ == MultiOptionPolicy::Join) {
results_t partial_result = {detail::join(results_, "\n")};
local_result = !callback_(partial_result);
} else {
// Exact number required
if(get_items_expected() > 0) {
if(results_.size() != static_cast<size_t>(get_items_expected()))
throw ArgumentMismatch(get_name(), get_items_expected(), results_.size());
// Variable length list
} else if(get_items_expected() < 0) {
// Require that this be a multiple of expected size and at least as many as expected
if(results_.size() < static_cast<size_t>(-get_items_expected()) ||
results_.size() % static_cast<size_t>(std::abs(get_type_size())) != 0u)
throw ArgumentMismatch(get_name(), get_items_expected(), results_.size());
}
local_result = !callback_(results_);
}
if(local_result)
throw ConversionError(get_name(), results_);
}
/// If options share any of the same names, they are equal (not counting positional)
bool operator==(const Option &other) const {
for(const std::string &sname : snames_)
if(other.check_sname(sname))
return true;
for(const std::string &lname : lnames_)
if(other.check_lname(lname))
return true;
if(ignore_case_ ||
ignore_underscore_) { // We need to do the inverse, in case we are ignore_case or ignore underscore
for(const std::string &sname : other.snames_)
if(check_sname(sname))
return true;
for(const std::string &lname : other.lnames_)
if(check_lname(lname))
return true;
}
return false;
}
/// Check a name. Requires "-" or "--" for short / long, supports positional name
bool check_name(std::string name) const {
if(name.length() > 2 && name[0] == '-' && name[1] == '-')
return check_lname(name.substr(2));
else if(name.length() > 1 && name.front() == '-')
return check_sname(name.substr(1));
else {
std::string local_pname = pname_;
if(ignore_underscore_) {
local_pname = detail::remove_underscore(local_pname);
name = detail::remove_underscore(name);
}
if(ignore_case_) {
local_pname = detail::to_lower(local_pname);
name = detail::to_lower(name);
}
return name == local_pname;
}
}
/// Requires "-" to be removed from string
bool check_sname(std::string name) const { return (detail::find_member(name, snames_, ignore_case_) >= 0); }
/// Requires "--" to be removed from string
bool check_lname(std::string name) const {
return (detail::find_member(name, lnames_, ignore_case_, ignore_underscore_) >= 0);
}
/// Requires "--" to be removed from string
bool check_fname(std::string name) const {
if(fnames_.empty()) {
return false;
}
return (detail::find_member(name, fnames_, ignore_case_, ignore_underscore_) >= 0);
}
std::string get_flag_value(std::string name, std::string input_value) const {
static const std::string trueString{"true"};
static const std::string falseString{"false"};
static const std::string emptyString{"{}"};
// check for disable flag override_
if(disable_flag_override_) {
if(!((input_value.empty()) || (input_value == emptyString))) {
auto default_ind = detail::find_member(name, fnames_, ignore_case_, ignore_underscore_);
if(default_ind >= 0) {
// We can static cast this to size_t because it is more than 0 in this block
if(default_flag_values_[static_cast<size_t>(default_ind)].second != input_value) {
throw(ArgumentMismatch::FlagOverride(name));
}
} else {
if(input_value != trueString) {
throw(ArgumentMismatch::FlagOverride(name));
}
}
}
}
auto ind = detail::find_member(name, fnames_, ignore_case_, ignore_underscore_);
if((input_value.empty()) || (input_value == emptyString)) {
return (ind < 0) ? trueString : default_flag_values_[static_cast<size_t>(ind)].second;
}
if(ind < 0) {
return input_value;
}
if(default_flag_values_[static_cast<size_t>(ind)].second == falseString) {
try {
auto val = detail::to_flag_value(input_value);
return (val == 1) ? falseString : (val == (-1) ? trueString : std::to_string(-val));
} catch(const std::invalid_argument &) {
return input_value;
}
} else {
return input_value;
}
}
/// Puts a result at the end
Option *add_result(std::string s) {
_add_result(std::move(s));
callback_run_ = false;
return this;
}
/// Puts a result at the end and get a count of the number of arguments actually added
Option *add_result(std::string s, int &results_added) {
results_added = _add_result(std::move(s));
callback_run_ = false;
return this;
}
/// Puts a result at the end
Option *add_result(std::vector<std::string> s) {
for(auto &str : s) {
_add_result(std::move(str));
}
callback_run_ = false;
return this;
}
/// Get a copy of the results
std::vector<std::string> results() const { return results_; }
/// get the results as a particular type
template <typename T,
enable_if_t<!is_vector<T>::value && !std::is_const<T>::value, detail::enabler> = detail::dummy>
void results(T &output) const {
bool retval;
if(results_.empty()) {
retval = detail::lexical_cast(default_str_, output);
} else if(results_.size() == 1) {
retval = detail::lexical_cast(results_[0], output);
} else {
switch(multi_option_policy_) {
case MultiOptionPolicy::TakeFirst:
retval = detail::lexical_cast(results_.front(), output);
break;
case MultiOptionPolicy::TakeLast:
default:
retval = detail::lexical_cast(results_.back(), output);
break;
case MultiOptionPolicy::Throw:
throw ConversionError(get_name(), results_);
case MultiOptionPolicy::Join:
retval = detail::lexical_cast(detail::join(results_), output);
break;
}
}
if(!retval) {
throw ConversionError(get_name(), results_);
}
}
/// get the results as a vector of a particular type
template <typename T> void results(std::vector<T> &output) const {
output.clear();
bool retval = true;
for(const auto &elem : results_) {
output.emplace_back();
retval &= detail::lexical_cast(elem, output.back());
}
if(!retval) {
throw ConversionError(get_name(), results_);
}
}
/// return the results as a particular type
template <typename T> T as() const {
T output;
results(output);
return output;
}
/// See if the callback has been run already
bool get_callback_run() const { return callback_run_; }
///@}
/// @name Custom options
///@{
/// Set the type function to run when displayed on this option
Option *type_name_fn(std::function<std::string()> typefun) {
type_name_ = typefun;
return this;
}
/// Set a custom option typestring
Option *type_name(std::string typeval) {
type_name_fn([typeval]() { return typeval; });
return this;
}
/// Set a custom option size
Option *type_size(int option_type_size) {
type_size_ = option_type_size;
if(type_size_ == 0)
required_ = false;
if(option_type_size < 0)
expected_ = -1;
return this;
}
/// Set a capture function for the default. Mostly used by App.
Option *default_function(const std::function<std::string()> &func) {
default_function_ = func;
return this;
}
/// Capture the default value from the original value (if it can be captured)
Option *capture_default_str() {
if(default_function_) {
default_str_ = default_function_();
}
return this;
}
/// Set the default value string representation (does not change the contained value)
Option *default_str(std::string val) {
default_str_ = val;
return this;
}
/// Set the default value string representation and evaluate into the bound value
Option *default_val(std::string val) {
default_str(val);
auto old_results = results_;
results_ = {val};
run_callback();
results_ = std::move(old_results);
return this;
}
/// Get the full typename for this option
std::string get_type_name() const {
std::string full_type_name = type_name_();
if(!validators_.empty()) {
for(auto &validator : validators_) {
std::string vtype = validator.get_description();
if(!vtype.empty()) {
full_type_name += ":" + vtype;
}
}
}
return full_type_name;
}
private:
// run through the validators
std::string _validate(std::string &result) {
std::string err_msg;
for(const auto &vali : validators_) {
try {
err_msg = vali(result);
} catch(const ValidationError &err) {
err_msg = err.what();
}
if(!err_msg.empty())
break;
}
return err_msg;
}
int _add_result(std::string &&result) {
int result_count = 0;
if(delimiter_ == '\0') {
results_.push_back(std::move(result));
++result_count;
} else {
if((result.find_first_of(delimiter_) != std::string::npos)) {
for(const auto &var : CLI::detail::split(result, delimiter_)) {
if(!var.empty()) {
results_.push_back(var);
++result_count;
}
}
} else {
results_.push_back(std::move(result));
++result_count;
}
}
return result_count;
}
};
} // namespace CLI
// From CLI/App.hpp:
namespace CLI {
#ifndef CLI11_PARSE
#define CLI11_PARSE(app, argc, argv) \
try { \
(app).parse((argc), (argv)); \
} catch(const CLI::ParseError &e) { \
return (app).exit(e); \
}
#endif
namespace detail {
enum class Classifier { NONE, POSITIONAL_MARK, SHORT, LONG, WINDOWS, SUBCOMMAND, SUBCOMMAND_TERMINATOR };
struct AppFriend;
} // namespace detail
namespace FailureMessage {
std::string simple(const App *app, const Error &e);
std::string help(const App *app, const Error &e);
} // namespace FailureMessage
class App;
using App_p = std::shared_ptr<App>;
class Option_group;
/// Creates a command line program, with very few defaults.
/** To use, create a new `Program()` instance with `argc`, `argv`, and a help description. The templated
* add_option methods make it easy to prepare options. Remember to call `.start` before starting your
* program, so that the options can be evaluated and the help option doesn't accidentally run your program. */
class App {
friend Option;
friend detail::AppFriend;
protected:
// This library follows the Google style guide for member names ending in underscores
/// @name Basics
///@{
/// Subcommand name or program name (from parser if name is empty)
std::string name_;
/// Description of the current program/subcommand
std::string description_;
/// If true, allow extra arguments (ie, don't throw an error). INHERITABLE
bool allow_extras_{false};
/// If true, allow extra arguments in the ini file (ie, don't throw an error). INHERITABLE
bool allow_config_extras_{false};
/// If true, return immediately on an unrecognized option (implies allow_extras) INHERITABLE
bool prefix_command_{false};
/// If set to true the name was automatically generated from the command line vs a user set name
bool has_automatic_name_{false};
/// If set to true the subcommand is required to be processed and used, ignored for main app
bool required_{false};
/// If set to true the subcommand is disabled and cannot be used, ignored for main app
bool disabled_{false};
/// Flag indicating that the pre_parse_callback has been triggered
bool pre_parse_called_{false};
/// Flag indicating that the callback for the subcommand should be executed immediately on parse completion which is
/// before help or ini files are processed. INHERITABLE
bool immediate_callback_{false};
/// This is a function that runs prior to the start of parsing
std::function<void(size_t)> pre_parse_callback_;
/// This is a function that runs when complete. Great for subcommands. Can throw.
std::function<void()> callback_;
///@}
/// @name Options
///@{
/// The default values for options, customizable and changeable INHERITABLE
OptionDefaults option_defaults_;
/// The list of options, stored locally
std::vector<Option_p> options_;
///@}
/// @name Help
///@{
/// Footer to put after all options in the help output INHERITABLE
std::string footer_;
/// A pointer to the help flag if there is one INHERITABLE
Option *help_ptr_{nullptr};
/// A pointer to the help all flag if there is one INHERITABLE
Option *help_all_ptr_{nullptr};
/// This is the formatter for help printing. Default provided. INHERITABLE (same pointer)
std::shared_ptr<FormatterBase> formatter_{new Formatter()};
/// The error message printing function INHERITABLE
std::function<std::string(const App *, const Error &e)> failure_message_ = FailureMessage::simple;
///@}
/// @name Parsing
///@{
using missing_t = std::vector<std::pair<detail::Classifier, std::string>>;
/// Pair of classifier, string for missing options. (extra detail is removed on returning from parse)
///
/// This is faster and cleaner than storing just a list of strings and reparsing. This may contain the -- separator.
missing_t missing_;
/// This is a list of pointers to options with the original parse order
std::vector<Option *> parse_order_;
/// This is a list of the subcommands collected, in order
std::vector<App *> parsed_subcommands_;
/// this is a list of subcommands that are exclusionary to this one
std::set<App *> exclude_subcommands_;
/// This is a list of options which are exclusionary to this App, if the options were used this subcommand should
/// not be
std::set<Option *> exclude_options_;
///@}
/// @name Subcommands
///@{
/// Storage for subcommand list
std::vector<App_p> subcommands_;
/// If true, the program name is not case sensitive INHERITABLE
bool ignore_case_{false};
/// If true, the program should ignore underscores INHERITABLE
bool ignore_underscore_{false};
/// Allow subcommand fallthrough, so that parent commands can collect commands after subcommand. INHERITABLE
bool fallthrough_{false};
/// Allow '/' for options for Windows like options. Defaults to true on Windows, false otherwise. INHERITABLE
bool allow_windows_style_options_{
#ifdef _WIN32
true
#else
false
#endif
};
/// specify that positional arguments come at the end of the argument sequence not inheritable
bool positionals_at_end_{false};
/// If set to true the subcommand will start each parse disabled
bool disabled_by_default_{false};
/// If set to true the subcommand will be reenabled at the start of each parse
bool enabled_by_default_{false};
/// If set to true positional options are validated before assigning INHERITABLE
bool validate_positionals_{false};
/// A pointer to the parent if this is a subcommand
App *parent_{nullptr};
/// Counts the number of times this command/subcommand was parsed
size_t parsed_ = 0;
/// Minimum required subcommands (not inheritable!)
size_t require_subcommand_min_ = 0;
/// Max number of subcommands allowed (parsing stops after this number). 0 is unlimited INHERITABLE
size_t require_subcommand_max_ = 0;
/// Minimum required options (not inheritable!)
size_t require_option_min_ = 0;
/// Max number of options allowed. 0 is unlimited (not inheritable)
size_t require_option_max_ = 0;
/// The group membership INHERITABLE
std::string group_{"Subcommands"};
///@}
/// @name Config
///@{
/// The name of the connected config file
std::string config_name_;
/// True if ini is required (throws if not present), if false simply keep going.
bool config_required_{false};
/// Pointer to the config option
Option *config_ptr_{nullptr};
/// This is the formatter for help printing. Default provided. INHERITABLE (same pointer)
std::shared_ptr<Config> config_formatter_{new ConfigINI()};
///@}
/// Special private constructor for subcommand
App(std::string app_description, std::string app_name, App *parent)
: name_(std::move(app_name)), description_(std::move(app_description)), parent_(parent) {
// Inherit if not from a nullptr
if(parent_ != nullptr) {
if(parent_->help_ptr_ != nullptr)
set_help_flag(parent_->help_ptr_->get_name(false, true), parent_->help_ptr_->get_description());
if(parent_->help_all_ptr_ != nullptr)
set_help_all_flag(parent_->help_all_ptr_->get_name(false, true),
parent_->help_all_ptr_->get_description());
/// OptionDefaults
option_defaults_ = parent_->option_defaults_;
// INHERITABLE
failure_message_ = parent_->failure_message_;
allow_extras_ = parent_->allow_extras_;
allow_config_extras_ = parent_->allow_config_extras_;
prefix_command_ = parent_->prefix_command_;
immediate_callback_ = parent_->immediate_callback_;
ignore_case_ = parent_->ignore_case_;
ignore_underscore_ = parent_->ignore_underscore_;
fallthrough_ = parent_->fallthrough_;
validate_positionals_ = parent_->validate_positionals_;
allow_windows_style_options_ = parent_->allow_windows_style_options_;
group_ = parent_->group_;
footer_ = parent_->footer_;
formatter_ = parent_->formatter_;
config_formatter_ = parent_->config_formatter_;
require_subcommand_max_ = parent_->require_subcommand_max_;
}
}
public:
/// @name Basic
///@{
/// Create a new program. Pass in the same arguments as main(), along with a help string.
explicit App(std::string app_description = "", std::string app_name = "")
: App(app_description, app_name, nullptr) {
set_help_flag("-h,--help", "Print this help message and exit");
}
/// virtual destructor
virtual ~App() = default;
/// Set a callback for the end of parsing.
///
/// Due to a bug in c++11,
/// it is not possible to overload on std::function (fixed in c++14
/// and backported to c++11 on newer compilers). Use capture by reference
/// to get a pointer to App if needed.
App *callback(std::function<void()> app_callback) {
callback_ = std::move(app_callback);
return this;
}
/// Set a callback to execute prior to parsing.
///
App *preparse_callback(std::function<void(size_t)> pp_callback) {
pre_parse_callback_ = std::move(pp_callback);
return this;
}
/// Set a name for the app (empty will use parser to set the name)
App *name(std::string app_name = "") {
name_ = app_name;
has_automatic_name_ = false;
return this;
}
/// Remove the error when extras are left over on the command line.
App *allow_extras(bool allow = true) {
allow_extras_ = allow;
return this;
}
/// Remove the error when extras are left over on the command line.
App *required(bool require = true) {
required_ = require;
return this;
}
/// Disable the subcommand or option group
App *disabled(bool disable = true) {
disabled_ = disable;
return this;
}
/// Set the subcommand to be disabled by default, so on clear(), at the start of each parse it is disabled
App *disabled_by_default(bool disable = true) {
disabled_by_default_ = disable;
return this;
}
/// Set the subcommand to be enabled by default, so on clear(), at the start of each parse it is enabled (not
/// disabled)
App *enabled_by_default(bool enable = true) {
enabled_by_default_ = enable;
return this;
}
/// Set the subcommand callback to be executed immediately on subcommand completion
App *immediate_callback(bool immediate = true) {
immediate_callback_ = immediate;
return this;
}
/// Set the subcommand to validate positional arguments before assigning
App *validate_positionals(bool validate = true) {
validate_positionals_ = validate;
return this;
}
/// Remove the error when extras are left over on the command line.
/// Will also call App::allow_extras().
App *allow_config_extras(bool allow = true) {
allow_extras(allow);
allow_config_extras_ = allow;
return this;
}
/// Do not parse anything after the first unrecognized option and return
App *prefix_command(bool allow = true) {
prefix_command_ = allow;
return this;
}
/// Ignore case. Subcommands inherit value.
App *ignore_case(bool value = true) {
ignore_case_ = value;
if(parent_ != nullptr && !name_.empty()) {
for(const auto &subc : parent_->subcommands_) {
if(subc.get() != this && (this->check_name(subc->name_) || subc->check_name(this->name_)))
throw OptionAlreadyAdded(subc->name_);
}
}
return this;
}
/// Allow windows style options, such as `/opt`. First matching short or long name used. Subcommands inherit value.
App *allow_windows_style_options(bool value = true) {
allow_windows_style_options_ = value;
return this;
}
/// Specify that the positional arguments are only at the end of the sequence
App *positionals_at_end(bool value = true) {
positionals_at_end_ = value;
return this;
}
/// Ignore underscore. Subcommands inherit value.
App *ignore_underscore(bool value = true) {
ignore_underscore_ = value;
if(parent_ != nullptr && !name_.empty()) {
for(const auto &subc : parent_->subcommands_) {
if(subc.get() != this && (this->check_name(subc->name_) || subc->check_name(this->name_)))
throw OptionAlreadyAdded(subc->name_);
}
}
return this;
}
/// Set the help formatter
App *formatter(std::shared_ptr<FormatterBase> fmt) {
formatter_ = fmt;
return this;
}
/// Set the help formatter
App *formatter_fn(std::function<std::string(const App *, std::string, AppFormatMode)> fmt) {
formatter_ = std::make_shared<FormatterLambda>(fmt);
return this;
}
/// Set the config formatter
App *config_formatter(std::shared_ptr<Config> fmt) {
config_formatter_ = fmt;
return this;
}
/// Check to see if this subcommand was parsed, true only if received on command line.
bool parsed() const { return parsed_ > 0; }
/// Get the OptionDefault object, to set option defaults
OptionDefaults *option_defaults() { return &option_defaults_; }
///@}
/// @name Adding options
///@{
/// Add an option, will automatically understand the type for common types.
///
/// To use, create a variable with the expected type, and pass it in after the name.
/// After start is called, you can use count to see if the value was passed, and
/// the value will be initialized properly. Numbers, vectors, and strings are supported.
///
/// ->required(), ->default, and the validators are options,
/// The positional options take an optional number of arguments.
///
/// For example,
///
/// std::string filename;
/// program.add_option("filename", filename, "description of filename");
///
Option *add_option(std::string option_name,
callback_t option_callback,
std::string option_description = "",
bool defaulted = false,
std::function<std::string()> func = {}) {
Option myopt{option_name, option_description, option_callback, this};
if(std::find_if(std::begin(options_), std::end(options_), [&myopt](const Option_p &v) {
return *v == myopt;
}) == std::end(options_)) {
options_.emplace_back();
Option_p &option = options_.back();
option.reset(new Option(option_name, option_description, option_callback, this));
// Set the default string capture function
option->default_function(func);
// For compatibility with CLI11 1.7 and before, capture the default string here
if(defaulted)
option->capture_default_str();
// Transfer defaults to the new option
option_defaults_.copy_to(option.get());
// Don't bother to capture if we already did
if(!defaulted && option->get_always_capture_default())
option->capture_default_str();
return option.get();
} else
throw OptionAlreadyAdded(myopt.get_name());
}
/// Add option for non-vectors (duplicate copy needed without defaulted to avoid `iostream << value`)
template <typename T, enable_if_t<!is_vector<T>::value & !std::is_const<T>::value, detail::enabler> = detail::dummy>
Option *add_option(std::string option_name,
T &variable, ///< The variable to set
std::string option_description = "",
bool defaulted = false) {
auto fun = [&variable](CLI::results_t res) { return detail::lexical_cast(res[0], variable); };
Option *opt = add_option(option_name, fun, option_description, defaulted, [&variable]() {
return std::string(CLI::detail::to_string(variable));
});
opt->type_name(detail::type_name<T>());
return opt;
}
/// Add option for a callback of a specific type
template <typename T, enable_if_t<!is_vector<T>::value, detail::enabler> = detail::dummy>
Option *add_option_function(std::string option_name,
const std::function<void(const T &)> &func, ///< the callback to execute
std::string option_description = "") {
auto fun = [func](CLI::results_t res) {
T variable;
bool result = detail::lexical_cast(res[0], variable);
if(result) {
func(variable);
}
return result;
};
Option *opt = add_option(option_name, std::move(fun), option_description, false);
opt->type_name(detail::type_name<T>());
return opt;
}
/// Add option with no description or variable assignment
Option *add_option(std::string option_name) {
return add_option(option_name, CLI::callback_t(), std::string{}, false);
}
/// Add option with description but with no variable assignment or callback
template <typename T,
enable_if_t<std::is_const<T>::value && std::is_constructible<std::string, T>::value, detail::enabler> =
detail::dummy>
Option *add_option(std::string option_name, T &option_description) {
return add_option(option_name, CLI::callback_t(), option_description, false);
}
/// Add option for vectors
template <typename T>
Option *add_option(std::string option_name,
std::vector<T> &variable, ///< The variable vector to set
std::string option_description = "",
bool defaulted = false) {
auto fun = [&variable](CLI::results_t res) {
bool retval = true;
variable.clear();
variable.reserve(res.size());
for(const auto &elem : res) {
variable.emplace_back();
retval &= detail::lexical_cast(elem, variable.back());
}
return (!variable.empty()) && retval;
};
auto default_function = [&variable]() {
std::vector<std::string> defaults;
defaults.resize(variable.size());
std::transform(variable.begin(), variable.end(), defaults.begin(), [](T &val) {
return std::string(CLI::detail::to_string(val));
});
return std::string("[" + detail::join(defaults) + "]");
};
Option *opt = add_option(option_name, fun, option_description, defaulted, default_function);
opt->type_name(detail::type_name<T>())->type_size(-1);
return opt;
}
/// Add option for a vector callback of a specific type
template <typename T, enable_if_t<is_vector<T>::value, detail::enabler> = detail::dummy>
Option *add_option_function(std::string option_name,
const std::function<void(const T &)> &func, ///< the callback to execute
std::string option_description = "") {
CLI::callback_t fun = [func](CLI::results_t res) {
T values;
bool retval = true;
values.reserve(res.size());
for(const auto &elem : res) {
values.emplace_back();
retval &= detail::lexical_cast(elem, values.back());
}
if(retval) {
func(values);
}
return retval;
};
Option *opt = add_option(option_name, std::move(fun), std::move(option_description), false);
opt->type_name(detail::type_name<T>())->type_size(-1);
return opt;
}
/// Set a help flag, replace the existing one if present
Option *set_help_flag(std::string flag_name = "", const std::string &help_description = "") {
// take flag_description by const reference otherwise add_flag tries to assign to help_description
if(help_ptr_ != nullptr) {
remove_option(help_ptr_);
help_ptr_ = nullptr;
}
// Empty name will simply remove the help flag
if(!flag_name.empty()) {
help_ptr_ = add_flag(flag_name, help_description);
help_ptr_->configurable(false);
}
return help_ptr_;
}
/// Set a help all flag, replaced the existing one if present
Option *set_help_all_flag(std::string help_name = "", const std::string &help_description = "") {
// take flag_description by const reference otherwise add_flag tries to assign to flag_description
if(help_all_ptr_ != nullptr) {
remove_option(help_all_ptr_);
help_all_ptr_ = nullptr;
}
// Empty name will simply remove the help all flag
if(!help_name.empty()) {
help_all_ptr_ = add_flag(help_name, help_description);
help_all_ptr_->configurable(false);
}
return help_all_ptr_;
}
private:
/// Internal function for adding a flag
Option *_add_flag_internal(std::string flag_name, CLI::callback_t fun, std::string flag_description) {
Option *opt;
if(detail::has_default_flag_values(flag_name)) {
// check for default values and if it has them
auto flag_defaults = detail::get_default_flag_values(flag_name);
detail::remove_default_flag_values(flag_name);
opt = add_option(std::move(flag_name), std::move(fun), std::move(flag_description), false);
for(const auto &fname : flag_defaults)
opt->fnames_.push_back(fname.first);
opt->default_flag_values_ = std::move(flag_defaults);
} else {
opt = add_option(std::move(flag_name), std::move(fun), std::move(flag_description), false);
}
// flags cannot have positional values
if(opt->get_positional()) {
auto pos_name = opt->get_name(true);
remove_option(opt);
throw IncorrectConstruction::PositionalFlag(pos_name);
}
opt->type_size(0);
return opt;
}
public:
/// Add a flag with no description or variable assignment
Option *add_flag(std::string flag_name) { return _add_flag_internal(flag_name, CLI::callback_t(), std::string{}); }
/// Add flag with description but with no variable assignment or callback
/// takes a constant string, if a variable string is passed that variable will be assigned the results from the
/// flag
template <typename T,
enable_if_t<std::is_const<T>::value && std::is_constructible<std::string, T>::value, detail::enabler> =
detail::dummy>
Option *add_flag(std::string flag_name, T &flag_description) {
return _add_flag_internal(flag_name, CLI::callback_t(), flag_description);
}
/// Add option for flag with integer result - defaults to allowing multiple passings, but can be forced to one if
/// `multi_option_policy(CLI::MultiOptionPolicy::Throw)` is used.
template <typename T,
enable_if_t<std::is_integral<T>::value && !is_bool<T>::value, detail::enabler> = detail::dummy>
Option *add_flag(std::string flag_name,
T &flag_count, ///< A variable holding the count
std::string flag_description = "") {
flag_count = 0;
CLI::callback_t fun = [&flag_count](CLI::results_t res) {
try {
detail::sum_flag_vector(res, flag_count);
} catch(const std::invalid_argument &) {
return false;
}
return true;
};
return _add_flag_internal(flag_name, std::move(fun), std::move(flag_description));
}
/// Other type version accepts all other types that are not vectors such as bool, enum, string or other classes that
/// can be converted from a string
template <typename T,
enable_if_t<!is_vector<T>::value && !std::is_const<T>::value &&
(!std::is_integral<T>::value || is_bool<T>::value) &&
!std::is_constructible<std::function<void(int)>, T>::value,
detail::enabler> = detail::dummy>
Option *add_flag(std::string flag_name,
T &flag_result, ///< A variable holding true if passed
std::string flag_description = "") {
CLI::callback_t fun = [&flag_result](CLI::results_t res) {
if(res.size() != 1) {
return false;
}
return CLI::detail::lexical_cast(res[0], flag_result);
};
Option *opt = _add_flag_internal(flag_name, std::move(fun), std::move(flag_description));
opt->multi_option_policy(CLI::MultiOptionPolicy::TakeLast);
return opt;
}
/// Vector version to capture multiple flags.
template <typename T,
enable_if_t<!std::is_assignable<std::function<void(int64_t)>, T>::value, detail::enabler> = detail::dummy>
Option *add_flag(std::string flag_name,
std::vector<T> &flag_results, ///< A vector of values with the flag results
std::string flag_description = "") {
CLI::callback_t fun = [&flag_results](CLI::results_t res) {
bool retval = true;
for(const auto &elem : res) {
flag_results.emplace_back();
retval &= detail::lexical_cast(elem, flag_results.back());
}
return retval;
};
return _add_flag_internal(flag_name, std::move(fun), std::move(flag_description));
}
/// Add option for callback that is triggered with a true flag and takes no arguments
Option *add_flag_callback(std::string flag_name,
std::function<void(void)> function, ///< A function to call, void(void)
std::string flag_description = "") {
CLI::callback_t fun = [function](CLI::results_t res) {
if(res.size() != 1) {
return false;
}
bool trigger;
auto result = CLI::detail::lexical_cast(res[0], trigger);
if(trigger)
function();
return result;
};
Option *opt = _add_flag_internal(flag_name, std::move(fun), std::move(flag_description));
opt->multi_option_policy(CLI::MultiOptionPolicy::TakeLast);
return opt;
}
/// Add option for callback with an integer value
Option *add_flag_function(std::string flag_name,
std::function<void(int64_t)> function, ///< A function to call, void(int)
std::string flag_description = "") {
CLI::callback_t fun = [function](CLI::results_t res) {
int64_t flag_count = 0;
detail::sum_flag_vector(res, flag_count);
function(flag_count);
return true;
};
return _add_flag_internal(flag_name, std::move(fun), std::move(flag_description));
}
#ifdef CLI11_CPP14
/// Add option for callback (C++14 or better only)
Option *add_flag(std::string flag_name,
std::function<void(int64_t)> function, ///< A function to call, void(int64_t)
std::string flag_description = "") {
return add_flag_function(std::move(flag_name), std::move(function), std::move(flag_description));
}
#endif
/// Add set of options (No default, temp reference, such as an inline set) DEPRECATED
template <typename T>
Option *add_set(std::string option_name,
T &member, ///< The selected member of the set
std::set<T> options, ///< The set of possibilities
std::string option_description = "") {
Option *opt = add_option(option_name, member, std::move(option_description));
opt->check(IsMember{options});
return opt;
}
/// Add set of options (No default, set can be changed afterwards - do not destroy the set) DEPRECATED
template <typename T>
Option *add_mutable_set(std::string option_name,
T &member, ///< The selected member of the set
const std::set<T> &options, ///< The set of possibilities
std::string option_description = "") {
Option *opt = add_option(option_name, member, std::move(option_description));
opt->check(IsMember{&options});
return opt;
}
/// Add set of options (with default, static set, such as an inline set) DEPRECATED
template <typename T>
Option *add_set(std::string option_name,
T &member, ///< The selected member of the set
std::set<T> options, ///< The set of possibilities
std::string option_description,
bool defaulted) {
Option *opt = add_option(option_name, member, std::move(option_description), defaulted);
opt->check(IsMember{options});
return opt;
}
/// Add set of options (with default, set can be changed afterwards - do not destroy the set) DEPRECATED
template <typename T>
Option *add_mutable_set(std::string option_name,
T &member, ///< The selected member of the set
const std::set<T> &options, ///< The set of possibilities
std::string option_description,
bool defaulted) {
Option *opt = add_option(option_name, member, std::move(option_description), defaulted);
opt->check(IsMember{&options});
return opt;
}
/// Add set of options, string only, ignore case (no default, static set) DEPRECATED
CLI11_DEPRECATED("Use ->transform(CLI::IsMember(..., CLI::ignore_case)) instead")
Option *add_set_ignore_case(std::string option_name,
std::string &member, ///< The selected member of the set
std::set<std::string> options, ///< The set of possibilities
std::string option_description = "") {
Option *opt = add_option(option_name, member, std::move(option_description));
opt->transform(IsMember{options, CLI::ignore_case});
return opt;
}
/// Add set of options, string only, ignore case (no default, set can be changed afterwards - do not destroy the
/// set) DEPRECATED
CLI11_DEPRECATED("Use ->transform(CLI::IsMember(..., CLI::ignore_case)) with a (shared) pointer instead")
Option *add_mutable_set_ignore_case(std::string option_name,
std::string &member, ///< The selected member of the set
const std::set<std::string> &options, ///< The set of possibilities
std::string option_description = "") {
Option *opt = add_option(option_name, member, std::move(option_description));
opt->transform(IsMember{&options, CLI::ignore_case});
return opt;
}
/// Add set of options, string only, ignore case (default, static set) DEPRECATED
CLI11_DEPRECATED("Use ->transform(CLI::IsMember(..., CLI::ignore_case)) instead")
Option *add_set_ignore_case(std::string option_name,
std::string &member, ///< The selected member of the set
std::set<std::string> options, ///< The set of possibilities
std::string option_description,
bool defaulted) {
Option *opt = add_option(option_name, member, std::move(option_description), defaulted);
opt->transform(IsMember{options, CLI::ignore_case});
return opt;
}
/// Add set of options, string only, ignore case (default, set can be changed afterwards - do not destroy the set)
/// DEPRECATED
CLI11_DEPRECATED("Use ->transform(CLI::IsMember(...)) with a (shared) pointer instead")
Option *add_mutable_set_ignore_case(std::string option_name,
std::string &member, ///< The selected member of the set
const std::set<std::string> &options, ///< The set of possibilities
std::string option_description,
bool defaulted) {
Option *opt = add_option(option_name, member, std::move(option_description), defaulted);
opt->transform(IsMember{&options, CLI::ignore_case});
return opt;
}
/// Add set of options, string only, ignore underscore (no default, static set) DEPRECATED
CLI11_DEPRECATED("Use ->transform(CLI::IsMember(..., CLI::ignore_underscore)) instead")
Option *add_set_ignore_underscore(std::string option_name,
std::string &member, ///< The selected member of the set
std::set<std::string> options, ///< The set of possibilities
std::string option_description = "") {
Option *opt = add_option(option_name, member, std::move(option_description));
opt->transform(IsMember{options, CLI::ignore_underscore});
return opt;
}
/// Add set of options, string only, ignore underscore (no default, set can be changed afterwards - do not destroy
/// the set) DEPRECATED
CLI11_DEPRECATED("Use ->transform(CLI::IsMember(..., CLI::ignore_underscore)) with a (shared) pointer instead")
Option *add_mutable_set_ignore_underscore(std::string option_name,
std::string &member, ///< The selected member of the set
const std::set<std::string> &options, ///< The set of possibilities
std::string option_description = "") {
Option *opt = add_option(option_name, member, std::move(option_description));
opt->transform(IsMember{options, CLI::ignore_underscore});
return opt;
}
/// Add set of options, string only, ignore underscore (default, static set) DEPRECATED
CLI11_DEPRECATED("Use ->transform(CLI::IsMember(..., CLI::ignore_underscore)) instead")
Option *add_set_ignore_underscore(std::string option_name,
std::string &member, ///< The selected member of the set
std::set<std::string> options, ///< The set of possibilities
std::string option_description,
bool defaulted) {
Option *opt = add_option(option_name, member, std::move(option_description), defaulted);
opt->transform(IsMember{options, CLI::ignore_underscore});
return opt;
}
/// Add set of options, string only, ignore underscore (default, set can be changed afterwards - do not destroy the
/// set) DEPRECATED
CLI11_DEPRECATED("Use ->transform(CLI::IsMember(..., CLI::ignore_underscore)) with a (shared) pointer instead")
Option *add_mutable_set_ignore_underscore(std::string option_name,
std::string &member, ///< The selected member of the set
const std::set<std::string> &options, ///< The set of possibilities
std::string option_description,
bool defaulted) {
Option *opt = add_option(option_name, member, std::move(option_description), defaulted);
opt->transform(IsMember{&options, CLI::ignore_underscore});
return opt;
}
/// Add set of options, string only, ignore underscore and case (no default, static set) DEPRECATED
CLI11_DEPRECATED("Use ->transform(CLI::IsMember(..., CLI::ignore_case, CLI::ignore_underscore)) instead")
Option *add_set_ignore_case_underscore(std::string option_name,
std::string &member, ///< The selected member of the set
std::set<std::string> options, ///< The set of possibilities
std::string option_description = "") {
Option *opt = add_option(option_name, member, std::move(option_description));
opt->transform(IsMember{options, CLI::ignore_underscore, CLI::ignore_case});
return opt;
}
/// Add set of options, string only, ignore underscore and case (no default, set can be changed afterwards - do not
/// destroy the set) DEPRECATED
CLI11_DEPRECATED(
"Use ->transform(CLI::IsMember(..., CLI::ignore_case, CLI::ignore_underscore)) with a (shared) pointer instead")
Option *add_mutable_set_ignore_case_underscore(std::string option_name,
std::string &member, ///< The selected member of the set
const std::set<std::string> &options, ///< The set of possibilities
std::string option_description = "") {
Option *opt = add_option(option_name, member, std::move(option_description));
opt->transform(IsMember{&options, CLI::ignore_underscore, CLI::ignore_case});
return opt;
}
/// Add set of options, string only, ignore underscore and case (default, static set) DEPRECATED
CLI11_DEPRECATED("Use ->transform(CLI::IsMember(..., CLI::ignore_case, CLI::ignore_underscore)) instead")
Option *add_set_ignore_case_underscore(std::string option_name,
std::string &member, ///< The selected member of the set
std::set<std::string> options, ///< The set of possibilities
std::string option_description,
bool defaulted) {
Option *opt = add_option(option_name, member, std::move(option_description), defaulted);
opt->transform(IsMember{options, CLI::ignore_underscore, CLI::ignore_case});
return opt;
}
/// Add set of options, string only, ignore underscore and case (default, set can be changed afterwards - do not
/// destroy the set) DEPRECATED
CLI11_DEPRECATED(
"Use ->transform(CLI::IsMember(..., CLI::ignore_case, CLI::ignore_underscore)) with a (shared) pointer instead")
Option *add_mutable_set_ignore_case_underscore(std::string option_name,
std::string &member, ///< The selected member of the set
const std::set<std::string> &options, ///< The set of possibilities
std::string option_description,
bool defaulted) {
Option *opt = add_option(option_name, member, std::move(option_description), defaulted);
opt->transform(IsMember{&options, CLI::ignore_underscore, CLI::ignore_case});
return opt;
}
/// Add a complex number
template <typename T>
Option *add_complex(std::string option_name,
T &variable,
std::string option_description = "",
bool defaulted = false,
std::string label = "COMPLEX") {
std::string simple_name = CLI::detail::split(option_name, ',').at(0);
CLI::callback_t fun = [&variable, simple_name, label](results_t res) {
if(res[1].back() == 'i')
res[1].pop_back();
double x, y;
bool worked = detail::lexical_cast(res[0], x) && detail::lexical_cast(res[1], y);
if(worked)
variable = T(x, y);
return worked;
};
auto default_function = [&variable]() {
std::stringstream out;
out << variable;
return out.str();
};
CLI::Option *opt =
add_option(option_name, std::move(fun), std::move(option_description), defaulted, default_function);
opt->type_name(label)->type_size(2);
return opt;
}
/// Set a configuration ini file option, or clear it if no name passed
Option *set_config(std::string option_name = "",
std::string default_filename = "",
std::string help_message = "Read an ini file",
bool config_required = false) {
// Remove existing config if present
if(config_ptr_ != nullptr)
remove_option(config_ptr_);
// Only add config if option passed
if(!option_name.empty()) {
config_name_ = default_filename;
config_required_ = config_required;
config_ptr_ = add_option(option_name, config_name_, help_message, !default_filename.empty());
config_ptr_->configurable(false);
}
return config_ptr_;
}
/// Removes an option from the App. Takes an option pointer. Returns true if found and removed.
bool remove_option(Option *opt) {
// Make sure no links exist
for(Option_p &op : options_) {
op->remove_needs(opt);
op->remove_excludes(opt);
}
if(help_ptr_ == opt)
help_ptr_ = nullptr;
if(help_all_ptr_ == opt)
help_all_ptr_ = nullptr;
auto iterator =
std::find_if(std::begin(options_), std::end(options_), [opt](const Option_p &v) { return v.get() == opt; });
if(iterator != std::end(options_)) {
options_.erase(iterator);
return true;
}
return false;
}
/// creates an option group as part of the given app
template <typename T = Option_group>
T *add_option_group(std::string group_name, std::string group_description = "") {
auto option_group = std::make_shared<T>(std::move(group_description), group_name, nullptr);
auto ptr = option_group.get();
// move to App_p for overload resolution on older gcc versions
App_p app_ptr = std::dynamic_pointer_cast<App>(option_group);
add_subcommand(std::move(app_ptr));
return ptr;
}
///@}
/// @name Subcommmands
///@{
/// Add a subcommand. Inherits INHERITABLE and OptionDefaults, and help flag
App *add_subcommand(std::string subcommand_name = "", std::string subcommand_description = "") {
CLI::App_p subcom = std::shared_ptr<App>(new App(std::move(subcommand_description), subcommand_name, this));
return add_subcommand(std::move(subcom));
}
/// Add a previously created app as a subcommand
App *add_subcommand(CLI::App_p subcom) {
if(!subcom)
throw IncorrectConstruction("passed App is not valid");
if(!subcom->name_.empty()) {
for(const auto &subc : subcommands_)
if(subc->check_name(subcom->name_) || subcom->check_name(subc->name_))
throw OptionAlreadyAdded(subc->name_);
}
subcom->parent_ = this;
subcommands_.push_back(std::move(subcom));
return subcommands_.back().get();
}
/// Removes a subcommand from the App. Takes a subcommand pointer. Returns true if found and removed.
bool remove_subcommand(App *subcom) {
// Make sure no links exist
for(App_p &sub : subcommands_) {
sub->remove_excludes(subcom);
}
auto iterator = std::find_if(
std::begin(subcommands_), std::end(subcommands_), [subcom](const App_p &v) { return v.get() == subcom; });
if(iterator != std::end(subcommands_)) {
subcommands_.erase(iterator);
return true;
}
return false;
}
/// Check to see if a subcommand is part of this command (doesn't have to be in command line)
/// returns the first subcommand if passed a nullptr
App *get_subcommand(App *subcom) const {
if(subcom == nullptr)
throw OptionNotFound("nullptr passed");
for(const App_p &subcomptr : subcommands_)
if(subcomptr.get() == subcom)
return subcom;
throw OptionNotFound(subcom->get_name());
}
/// Check to see if a subcommand is part of this command (text version)
App *get_subcommand(std::string subcom) const {
auto subc = _find_subcommand(subcom, false, false);
if(subc == nullptr)
throw OptionNotFound(subcom);
return subc;
}
/// Get a pointer to subcommand by index
App *get_subcommand(int index = 0) const {
if(index >= 0) {
auto uindex = static_cast<unsigned>(index);
if(uindex < subcommands_.size())
return subcommands_[uindex].get();
}
throw OptionNotFound(std::to_string(index));
}
/// Check to see if a subcommand is part of this command and get a shared_ptr to it
CLI::App_p get_subcommand_ptr(App *subcom) const {
if(subcom == nullptr)
throw OptionNotFound("nullptr passed");
for(const App_p &subcomptr : subcommands_)
if(subcomptr.get() == subcom)
return subcomptr;
throw OptionNotFound(subcom->get_name());
}
/// Check to see if a subcommand is part of this command (text version)
CLI::App_p get_subcommand_ptr(std::string subcom) const {
for(const App_p &subcomptr : subcommands_)
if(subcomptr->check_name(subcom))
return subcomptr;
throw OptionNotFound(subcom);
}
/// Get an owning pointer to subcommand by index
CLI::App_p get_subcommand_ptr(int index = 0) const {
if(index >= 0) {
auto uindex = static_cast<unsigned>(index);
if(uindex < subcommands_.size())
return subcommands_[uindex];
}
throw OptionNotFound(std::to_string(index));
}
/// Check to see if an option group is part of this App
App *get_option_group(std::string group_name) const {
for(const App_p &app : subcommands_) {
if(app->name_.empty() && app->group_ == group_name) {
return app.get();
}
}
throw OptionNotFound(group_name);
}
/// No argument version of count counts the number of times this subcommand was
/// passed in. The main app will return 1. Unnamed subcommands will also return 1 unless
/// otherwise modified in a callback
size_t count() const { return parsed_; }
/// Get a count of all the arguments processed in options and subcommands, this excludes arguments which were
/// treated as extras.
size_t count_all() const {
size_t cnt{0};
for(auto &opt : options_) {
cnt += opt->count();
}
for(auto &sub : subcommands_) {
cnt += sub->count_all();
}
if(!get_name().empty()) { // for named subcommands add the number of times the subcommand was called
cnt += parsed_;
}
return cnt;
}
/// Changes the group membership
App *group(std::string group_name) {
group_ = group_name;
return this;
}
/// The argumentless form of require subcommand requires 1 or more subcommands
App *require_subcommand() {
require_subcommand_min_ = 1;
require_subcommand_max_ = 0;
return this;
}
/// Require a subcommand to be given (does not affect help call)
/// The number required can be given. Negative values indicate maximum
/// number allowed (0 for any number). Max number inheritable.
App *require_subcommand(int value) {
if(value < 0) {
require_subcommand_min_ = 0;
require_subcommand_max_ = static_cast<size_t>(-value);
} else {
require_subcommand_min_ = static_cast<size_t>(value);
require_subcommand_max_ = static_cast<size_t>(value);
}
return this;
}
/// Explicitly control the number of subcommands required. Setting 0
/// for the max means unlimited number allowed. Max number inheritable.
App *require_subcommand(size_t min, size_t max) {
require_subcommand_min_ = min;
require_subcommand_max_ = max;
return this;
}
/// The argumentless form of require option requires 1 or more options be used
App *require_option() {
require_option_min_ = 1;
require_option_max_ = 0;
return this;
}
/// Require an option to be given (does not affect help call)
/// The number required can be given. Negative values indicate maximum
/// number allowed (0 for any number).
App *require_option(int value) {
if(value < 0) {
require_option_min_ = 0;
require_option_max_ = static_cast<size_t>(-value);
} else {
require_option_min_ = static_cast<size_t>(value);
require_option_max_ = static_cast<size_t>(value);
}
return this;
}
/// Explicitly control the number of options required. Setting 0
/// for the max means unlimited number allowed. Max number inheritable.
App *require_option(size_t min, size_t max) {
require_option_min_ = min;
require_option_max_ = max;
return this;
}
/// Stop subcommand fallthrough, so that parent commands cannot collect commands after subcommand.
/// Default from parent, usually set on parent.
App *fallthrough(bool value = true) {
fallthrough_ = value;
return this;
}
/// Check to see if this subcommand was parsed, true only if received on command line.
/// This allows the subcommand to be directly checked.
operator bool() const { return parsed_ > 0; }
///@}
/// @name Extras for subclassing
///@{
/// This allows subclasses to inject code before callbacks but after parse.
///
/// This does not run if any errors or help is thrown.
virtual void pre_callback() {}
///@}
/// @name Parsing
///@{
//
/// Reset the parsed data
void clear() {
parsed_ = 0;
pre_parse_called_ = false;
missing_.clear();
parsed_subcommands_.clear();
for(const Option_p &opt : options_) {
opt->clear();
}
for(const App_p &subc : subcommands_) {
subc->clear();
}
}
/// Parses the command line - throws errors.
/// This must be called after the options are in but before the rest of the program.
void parse(int argc, const char *const *argv) {
// If the name is not set, read from command line
if(name_.empty() || has_automatic_name_) {
has_automatic_name_ = true;
name_ = argv[0];
}
std::vector<std::string> args;
args.reserve(static_cast<size_t>(argc - 1));
for(int i = argc - 1; i > 0; i--)
args.emplace_back(argv[i]);
parse(std::move(args));
}
/// Parse a single string as if it contained command line arguments.
/// This function splits the string into arguments then calls parse(std::vector<std::string> &)
/// the function takes an optional boolean argument specifying if the programName is included in the string to
/// process
void parse(std::string commandline, bool program_name_included = false) {
if(program_name_included) {
auto nstr = detail::split_program_name(commandline);
if((name_.empty()) || (has_automatic_name_)) {
has_automatic_name_ = true;
name_ = nstr.first;
}
commandline = std::move(nstr.second);
} else
detail::trim(commandline);
// the next section of code is to deal with quoted arguments after an '=' or ':' for windows like operations
if(!commandline.empty()) {
commandline = detail::find_and_modify(commandline, "=", detail::escape_detect);
if(allow_windows_style_options_)
commandline = detail::find_and_modify(commandline, ":", detail::escape_detect);
}
auto args = detail::split_up(std::move(commandline));
// remove all empty strings
args.erase(std::remove(args.begin(), args.end(), std::string{}), args.end());
std::reverse(args.begin(), args.end());
parse(std::move(args));
}
/// The real work is done here. Expects a reversed vector.
/// Changes the vector to the remaining options.
void parse(std::vector<std::string> &args) {
// Clear if parsed
if(parsed_ > 0)
clear();
// parsed_ is incremented in commands/subcommands,
// but placed here to make sure this is cleared when
// running parse after an error is thrown, even by _validate or _configure.
parsed_ = 1;
_validate();
_configure();
// set the parent as nullptr as this object should be the top now
parent_ = nullptr;
parsed_ = 0;
_parse(args);
run_callback();
}
/// The real work is done here. Expects a reversed vector.
void parse(std::vector<std::string> &&args) {
// Clear if parsed
if(parsed_ > 0)
clear();
// parsed_ is incremented in commands/subcommands,
// but placed here to make sure this is cleared when
// running parse after an error is thrown, even by _validate or _configure.
parsed_ = 1;
_validate();
_configure();
// set the parent as nullptr as this object should be the top now
parent_ = nullptr;
parsed_ = 0;
_parse(std::move(args));
run_callback();
}
/// Provide a function to print a help message. The function gets access to the App pointer and error.
void failure_message(std::function<std::string(const App *, const Error &e)> function) {
failure_message_ = function;
}
/// Print a nice error message and return the exit code
int exit(const Error &e, std::ostream &out = std::cout, std::ostream &err = std::cerr) const {
/// Avoid printing anything if this is a CLI::RuntimeError
if(dynamic_cast<const CLI::RuntimeError *>(&e) != nullptr)
return e.get_exit_code();
if(dynamic_cast<const CLI::CallForHelp *>(&e) != nullptr) {
out << help();
return e.get_exit_code();
}
if(dynamic_cast<const CLI::CallForAllHelp *>(&e) != nullptr) {
out << help("", AppFormatMode::All);
return e.get_exit_code();
}
if(e.get_exit_code() != static_cast<int>(ExitCodes::Success)) {
if(failure_message_)
err << failure_message_(this, e) << std::flush;
}
return e.get_exit_code();
}
///@}
/// @name Post parsing
///@{
/// Counts the number of times the given option was passed.
size_t count(std::string option_name) const { return get_option(option_name)->count(); }
/// Get a subcommand pointer list to the currently selected subcommands (after parsing by default, in command
/// line order; use parsed = false to get the original definition list.)
std::vector<App *> get_subcommands() const { return parsed_subcommands_; }
/// Get a filtered subcommand pointer list from the original definition list. An empty function will provide all
/// subcommands (const)
std::vector<const App *> get_subcommands(const std::function<bool(const App *)> &filter) const {
std::vector<const App *> subcomms(subcommands_.size());
std::transform(std::begin(subcommands_), std::end(subcommands_), std::begin(subcomms), [](const App_p &v) {
return v.get();
});
if(filter) {
subcomms.erase(std::remove_if(std::begin(subcomms),
std::end(subcomms),
[&filter](const App *app) { return !filter(app); }),
std::end(subcomms));
}
return subcomms;
}
/// Get a filtered subcommand pointer list from the original definition list. An empty function will provide all
/// subcommands
std::vector<App *> get_subcommands(const std::function<bool(App *)> &filter) {
std::vector<App *> subcomms(subcommands_.size());
std::transform(std::begin(subcommands_), std::end(subcommands_), std::begin(subcomms), [](const App_p &v) {
return v.get();
});
if(filter) {
subcomms.erase(
std::remove_if(std::begin(subcomms), std::end(subcomms), [&filter](App *app) { return !filter(app); }),
std::end(subcomms));
}
return subcomms;
}
/// Check to see if given subcommand was selected
bool got_subcommand(App *subcom) const {
// get subcom needed to verify that this was a real subcommand
return get_subcommand(subcom)->parsed_ > 0;
}
/// Check with name instead of pointer to see if subcommand was selected
bool got_subcommand(std::string subcommand_name) const { return get_subcommand(subcommand_name)->parsed_ > 0; }
/// Sets excluded options for the subcommand
App *excludes(Option *opt) {
if(opt == nullptr) {
throw OptionNotFound("nullptr passed");
}
exclude_options_.insert(opt);
return this;
}
/// Sets excluded subcommands for the subcommand
App *excludes(App *app) {
if((app == this) || (app == nullptr)) {
throw OptionNotFound("nullptr passed");
}
auto res = exclude_subcommands_.insert(app);
// subcommand exclusion should be symmetric
if(res.second) {
app->exclude_subcommands_.insert(this);
}
return this;
}
/// Removes an option from the excludes list of this subcommand
bool remove_excludes(Option *opt) {
auto iterator = std::find(std::begin(exclude_options_), std::end(exclude_options_), opt);
if(iterator != std::end(exclude_options_)) {
exclude_options_.erase(iterator);
return true;
} else {
return false;
}
}
/// Removes a subcommand from this excludes list of this subcommand
bool remove_excludes(App *app) {
auto iterator = std::find(std::begin(exclude_subcommands_), std::end(exclude_subcommands_), app);
if(iterator != std::end(exclude_subcommands_)) {
auto other_app = *iterator;
exclude_subcommands_.erase(iterator);
other_app->remove_excludes(this);
return true;
} else {
return false;
}
}
///@}
/// @name Help
///@{
/// Set footer.
App *footer(std::string footer_string) {
footer_ = std::move(footer_string);
return this;
}
/// Produce a string that could be read in as a config of the current values of the App. Set default_also to
/// include default arguments. Prefix will add a string to the beginning of each option.
std::string config_to_str(bool default_also = false, bool write_description = false) const {
return config_formatter_->to_config(this, default_also, write_description, "");
}
/// Makes a help message, using the currently configured formatter
/// Will only do one subcommand at a time
std::string help(std::string prev = "", AppFormatMode mode = AppFormatMode::Normal) const {
if(prev.empty())
prev = get_name();
else
prev += " " + get_name();
// Delegate to subcommand if needed
auto selected_subcommands = get_subcommands();
if(!selected_subcommands.empty())
return selected_subcommands.at(0)->help(prev, mode);
else
return formatter_->make_help(this, prev, mode);
}
///@}
/// @name Getters
///@{
/// Access the formatter
std::shared_ptr<FormatterBase> get_formatter() const { return formatter_; }
/// Access the config formatter
std::shared_ptr<Config> get_config_formatter() const { return config_formatter_; }
/// Get the app or subcommand description
std::string get_description() const { return description_; }
/// Set the description of the app
App *description(std::string app_description) {
description_ = std::move(app_description);
return this;
}
/// Get the list of options (user facing function, so returns raw pointers), has optional filter function
std::vector<const Option *> get_options(const std::function<bool(const Option *)> filter = {}) const {
std::vector<const Option *> options(options_.size());
std::transform(std::begin(options_), std::end(options_), std::begin(options), [](const Option_p &val) {
return val.get();
});
if(filter) {
options.erase(std::remove_if(std::begin(options),
std::end(options),
[&filter](const Option *opt) { return !filter(opt); }),
std::end(options));
}
return options;
}
/// Get an option by name (noexcept non-const version)
Option *get_option_no_throw(std::string option_name) noexcept {
for(Option_p &opt : options_) {
if(opt->check_name(option_name)) {
return opt.get();
}
}
for(auto &subc : subcommands_) {
// also check down into nameless subcommands
if(subc->get_name().empty()) {
auto opt = subc->get_option_no_throw(option_name);
if(opt != nullptr) {
return opt;
}
}
}
return nullptr;
}
/// Get an option by name (noexcept const version)
const Option *get_option_no_throw(std::string option_name) const noexcept {
for(const Option_p &opt : options_) {
if(opt->check_name(option_name)) {
return opt.get();
}
}
for(const auto &subc : subcommands_) {
// also check down into nameless subcommands
if(subc->get_name().empty()) {
auto opt = subc->get_option_no_throw(option_name);
if(opt != nullptr) {
return opt;
}
}
}
return nullptr;
}
/// Get an option by name
const Option *get_option(std::string option_name) const {
auto opt = get_option_no_throw(option_name);
if(opt == nullptr) {
throw OptionNotFound(option_name);
}
return opt;
}
/// Get an option by name (non-const version)
Option *get_option(std::string option_name) {
auto opt = get_option_no_throw(option_name);
if(opt == nullptr) {
throw OptionNotFound(option_name);
}
return opt;
}
/// Shortcut bracket operator for getting a pointer to an option
const Option *operator[](const std::string &option_name) const { return get_option(option_name); }
/// Shortcut bracket operator for getting a pointer to an option
const Option *operator[](const char *option_name) const { return get_option(option_name); }
/// Check the status of ignore_case
bool get_ignore_case() const { return ignore_case_; }
/// Check the status of ignore_underscore
bool get_ignore_underscore() const { return ignore_underscore_; }
/// Check the status of fallthrough
bool get_fallthrough() const { return fallthrough_; }
/// Check the status of the allow windows style options
bool get_allow_windows_style_options() const { return allow_windows_style_options_; }
/// Check the status of the allow windows style options
bool get_positionals_at_end() const { return positionals_at_end_; }
/// Get the group of this subcommand
const std::string &get_group() const { return group_; }
/// Get footer.
const std::string &get_footer() const { return footer_; }
/// Get the required min subcommand value
size_t get_require_subcommand_min() const { return require_subcommand_min_; }
/// Get the required max subcommand value
size_t get_require_subcommand_max() const { return require_subcommand_max_; }
/// Get the required min option value
size_t get_require_option_min() const { return require_option_min_; }
/// Get the required max option value
size_t get_require_option_max() const { return require_option_max_; }
/// Get the prefix command status
bool get_prefix_command() const { return prefix_command_; }
/// Get the status of allow extras
bool get_allow_extras() const { return allow_extras_; }
/// Get the status of required
bool get_required() const { return required_; }
/// Get the status of disabled
bool get_disabled() const { return disabled_; }
/// Get the status of disabled
bool get_immediate_callback() const { return immediate_callback_; }
/// Get the status of disabled by default
bool get_disabled_by_default() const { return disabled_by_default_; }
/// Get the status of disabled by default
bool get_enabled_by_default() const { return enabled_by_default_; }
/// Get the status of validating positionals
bool get_validate_positionals() const { return validate_positionals_; }
/// Get the status of allow extras
bool get_allow_config_extras() const { return allow_config_extras_; }
/// Get a pointer to the help flag.
Option *get_help_ptr() { return help_ptr_; }
/// Get a pointer to the help flag. (const)
const Option *get_help_ptr() const { return help_ptr_; }
/// Get a pointer to the help all flag. (const)
const Option *get_help_all_ptr() const { return help_all_ptr_; }
/// Get a pointer to the config option.
Option *get_config_ptr() { return config_ptr_; }
/// Get a pointer to the config option. (const)
const Option *get_config_ptr() const { return config_ptr_; }
/// Get the parent of this subcommand (or nullptr if master app)
App *get_parent() { return parent_; }
/// Get the parent of this subcommand (or nullptr if master app) (const version)
const App *get_parent() const { return parent_; }
/// Get the name of the current app
std::string get_name() const { return name_; }
/// Get a display name for an app
std::string get_display_name() const { return (!name_.empty()) ? name_ : "[Option Group: " + get_group() + "]"; }
/// Check the name, case insensitive and underscore insensitive if set
bool check_name(std::string name_to_check) const {
std::string local_name = name_;
if(ignore_underscore_) {
local_name = detail::remove_underscore(name_);
name_to_check = detail::remove_underscore(name_to_check);
}
if(ignore_case_) {
local_name = detail::to_lower(name_);
name_to_check = detail::to_lower(name_to_check);
}
return local_name == name_to_check;
}
/// Get the groups available directly from this option (in order)
std::vector<std::string> get_groups() const {
std::vector<std::string> groups;
for(const Option_p &opt : options_) {
// Add group if it is not already in there
if(std::find(groups.begin(), groups.end(), opt->get_group()) == groups.end()) {
groups.push_back(opt->get_group());
}
}
return groups;
}
/// This gets a vector of pointers with the original parse order
const std::vector<Option *> &parse_order() const { return parse_order_; }
/// This returns the missing options from the current subcommand
std::vector<std::string> remaining(bool recurse = false) const {
std::vector<std::string> miss_list;
for(const std::pair<detail::Classifier, std::string> &miss : missing_) {
miss_list.push_back(std::get<1>(miss));
}
// Get from a subcommand that may allow extras
if(recurse) {
if(!allow_extras_) {
for(const auto &sub : subcommands_) {
if(sub->name_.empty() && !sub->missing_.empty()) {
for(const std::pair<detail::Classifier, std::string> &miss : sub->missing_) {
miss_list.push_back(std::get<1>(miss));
}
}
}
}
// Recurse into subcommands
for(const App *sub : parsed_subcommands_) {
std::vector<std::string> output = sub->remaining(recurse);
std::copy(std::begin(output), std::end(output), std::back_inserter(miss_list));
}
}
return miss_list;
}
/// This returns the missing options in a form ready for processing by another command line program
std::vector<std::string> remaining_for_passthrough(bool recurse = false) const {
std::vector<std::string> miss_list = remaining(recurse);
std::reverse(std::begin(miss_list), std::end(miss_list));
return miss_list;
}
/// This returns the number of remaining options, minus the -- separator
size_t remaining_size(bool recurse = false) const {
auto remaining_options = static_cast<size_t>(std::count_if(
std::begin(missing_), std::end(missing_), [](const std::pair<detail::Classifier, std::string> &val) {
return val.first != detail::Classifier::POSITIONAL_MARK;
}));
if(recurse) {
for(const App_p &sub : subcommands_) {
remaining_options += sub->remaining_size(recurse);
}
}
return remaining_options;
}
///@}
protected:
/// Check the options to make sure there are no conflicts.
///
/// Currently checks to see if multiple positionals exist with -1 args and checks if the min and max options are
/// feasible
void _validate() const {
auto pcount = std::count_if(std::begin(options_), std::end(options_), [](const Option_p &opt) {
return opt->get_items_expected() < 0 && opt->get_positional();
});
if(pcount > 1)
throw InvalidError(name_);
size_t nameless_subs{0};
for(const App_p &app : subcommands_) {
app->_validate();
if(app->get_name().empty())
++nameless_subs;
}
if(require_option_min_ > 0) {
if(require_option_max_ > 0) {
if(require_option_max_ < require_option_min_) {
throw(InvalidError("Required min options greater than required max options",
ExitCodes::InvalidError));
}
}
if(require_option_min_ > (options_.size() + nameless_subs)) {
throw(InvalidError("Required min options greater than number of available options",
ExitCodes::InvalidError));
}
}
}
/// configure subcommands to enable parsing through the current object
/// set the correct fallthrough and prefix for nameless subcommands and manage the automatic enable or disable
/// makes sure parent is set correctly
void _configure() {
if(disabled_by_default_) {
disabled_ = true;
}
if(enabled_by_default_) {
disabled_ = false;
}
for(const App_p &app : subcommands_) {
if(app->has_automatic_name_) {
app->name_.clear();
}
if(app->name_.empty()) {
app->fallthrough_ = false; // make sure fallthrough_ is false to prevent infinite loop
app->prefix_command_ = false;
}
// make sure the parent is set to be this object in preparation for parse
app->parent_ = this;
app->_configure();
}
}
/// Internal function to run (App) callback, bottom up
void run_callback() {
pre_callback();
// run the callbacks for the received subcommands
for(App *subc : get_subcommands()) {
if(!subc->immediate_callback_)
subc->run_callback();
}
// now run callbacks for option_groups
for(auto &subc : subcommands_) {
if(!subc->immediate_callback_ && subc->name_.empty() && subc->count_all() > 0) {
subc->run_callback();
}
}
// finally run the main callback
if(callback_ && (parsed_ > 0)) {
if(!name_.empty() || count_all() > 0) {
callback_();
}
}
}
/// Check to see if a subcommand is valid. Give up immediately if subcommand max has been reached.
bool _valid_subcommand(const std::string &current, bool ignore_used = true) const {
// Don't match if max has been reached - but still check parents
if(require_subcommand_max_ != 0 && parsed_subcommands_.size() >= require_subcommand_max_) {
return parent_ != nullptr && parent_->_valid_subcommand(current, ignore_used);
}
auto com = _find_subcommand(current, true, ignore_used);
if(com != nullptr) {
return true;
}
// Check parent if exists, else return false
return parent_ != nullptr && parent_->_valid_subcommand(current, ignore_used);
}
/// Selects a Classifier enum based on the type of the current argument
detail::Classifier _recognize(const std::string &current, bool ignore_used_subcommands = true) const {
std::string dummy1, dummy2;
if(current == "--")
return detail::Classifier::POSITIONAL_MARK;
if(_valid_subcommand(current, ignore_used_subcommands))
return detail::Classifier::SUBCOMMAND;
if(detail::split_long(current, dummy1, dummy2))
return detail::Classifier::LONG;
if(detail::split_short(current, dummy1, dummy2))
return detail::Classifier::SHORT;
if((allow_windows_style_options_) && (detail::split_windows_style(current, dummy1, dummy2)))
return detail::Classifier::WINDOWS;
if((current == "++") && !name_.empty() && parent_ != nullptr)
return detail::Classifier::SUBCOMMAND_TERMINATOR;
return detail::Classifier::NONE;
}
// The parse function is now broken into several parts, and part of process
/// Read and process an ini file (main app only)
void _process_ini() {
// Process an INI file
if(config_ptr_ != nullptr) {
if(*config_ptr_) {
config_ptr_->run_callback();
config_required_ = true;
}
if(!config_name_.empty()) {
try {
std::vector<ConfigItem> values = config_formatter_->from_file(config_name_);
_parse_config(values);
} catch(const FileError &) {
if(config_required_)
throw;
}
}
}
}
/// Get envname options if not yet passed. Runs on *all* subcommands.
void _process_env() {
for(const Option_p &opt : options_) {
if(opt->count() == 0 && !opt->envname_.empty()) {
char *buffer = nullptr;
std::string ename_string;
#ifdef _MSC_VER
// Windows version
size_t sz = 0;
if(_dupenv_s(&buffer, &sz, opt->envname_.c_str()) == 0 && buffer != nullptr) {
ename_string = std::string(buffer);
free(buffer);
}
#else
// This also works on Windows, but gives a warning
buffer = std::getenv(opt->envname_.c_str());
if(buffer != nullptr)
ename_string = std::string(buffer);
#endif
if(!ename_string.empty()) {
opt->add_result(ename_string);
}
}
}
for(App_p &sub : subcommands_) {
if(sub->get_name().empty() || !sub->immediate_callback_)
sub->_process_env();
}
}
/// Process callbacks. Runs on *all* subcommands.
void _process_callbacks() {
for(App_p &sub : subcommands_) {
// process the priority option_groups first
if(sub->get_name().empty() && sub->immediate_callback_) {
if(sub->count_all() > 0) {
sub->_process_callbacks();
sub->run_callback();
}
}
}
for(const Option_p &opt : options_) {
if(opt->count() > 0 && !opt->get_callback_run()) {
opt->run_callback();
}
}
for(App_p &sub : subcommands_) {
if(!sub->immediate_callback_) {
sub->_process_callbacks();
}
}
}
/// Run help flag processing if any are found.
///
/// The flags allow recursive calls to remember if there was a help flag on a parent.
void _process_help_flags(bool trigger_help = false, bool trigger_all_help = false) const {
const Option *help_ptr = get_help_ptr();
const Option *help_all_ptr = get_help_all_ptr();
if(help_ptr != nullptr && help_ptr->count() > 0)
trigger_help = true;
if(help_all_ptr != nullptr && help_all_ptr->count() > 0)
trigger_all_help = true;
// If there were parsed subcommands, call those. First subcommand wins if there are multiple ones.
if(!parsed_subcommands_.empty()) {
for(const App *sub : parsed_subcommands_)
sub->_process_help_flags(trigger_help, trigger_all_help);
// Only the final subcommand should call for help. All help wins over help.
} else if(trigger_all_help) {
throw CallForAllHelp();
} else if(trigger_help) {
throw CallForHelp();
}
}
/// Verify required options and cross requirements. Subcommands too (only if selected).
void _process_requirements() {
// check excludes
bool excluded{false};
std::string excluder;
for(auto &opt : exclude_options_) {
if(opt->count() > 0) {
excluded = true;
excluder = opt->get_name();
}
}
for(auto &subc : exclude_subcommands_) {
if(subc->count_all() > 0) {
excluded = true;
excluder = subc->get_display_name();
}
}
if(excluded) {
if(count_all() > 0) {
throw ExcludesError(get_display_name(), excluder);
}
// if we are excluded but didn't receive anything, just return
return;
}
size_t used_options = 0;
for(const Option_p &opt : options_) {
if(opt->count() != 0) {
++used_options;
}
// Required or partially filled
if(opt->get_required() || opt->count() != 0) {
// Make sure enough -N arguments parsed (+N is already handled in parsing function)
if(opt->get_items_expected() < 0 && opt->count() < static_cast<size_t>(-opt->get_items_expected()))
throw ArgumentMismatch::AtLeast(opt->get_name(), -opt->get_items_expected());
// Required but empty
if(opt->get_required() && opt->count() == 0)
throw RequiredError(opt->get_name());
}
// Requires
for(const Option *opt_req : opt->needs_)
if(opt->count() > 0 && opt_req->count() == 0)
throw RequiresError(opt->get_name(), opt_req->get_name());
// Excludes
for(const Option *opt_ex : opt->excludes_)
if(opt->count() > 0 && opt_ex->count() != 0)
throw ExcludesError(opt->get_name(), opt_ex->get_name());
}
// check for the required number of subcommands
if(require_subcommand_min_ > 0) {
auto selected_subcommands = get_subcommands();
if(require_subcommand_min_ > selected_subcommands.size())
throw RequiredError::Subcommand(require_subcommand_min_);
}
// Max error cannot occur, the extra subcommand will parse as an ExtrasError or a remaining item.
// run this loop to check how many unnamed subcommands were actually used since they are considered options from
// the perspective of an App
for(App_p &sub : subcommands_) {
if(sub->disabled_)
continue;
if(sub->name_.empty() && sub->count_all() > 0) {
++used_options;
}
}
if(require_option_min_ > used_options || (require_option_max_ > 0 && require_option_max_ < used_options)) {
auto option_list = detail::join(options_, [](const Option_p &ptr) { return ptr->get_name(false, true); });
if(option_list.compare(0, 10, "-h,--help,") == 0) {
option_list.erase(0, 10);
}
auto subc_list = get_subcommands([](App *app) { return ((app->get_name().empty()) && (!app->disabled_)); });
if(!subc_list.empty()) {
option_list += "," + detail::join(subc_list, [](const App *app) { return app->get_display_name(); });
}
throw RequiredError::Option(require_option_min_, require_option_max_, used_options, option_list);
}
// now process the requirements for subcommands if needed
for(App_p &sub : subcommands_) {
if(sub->disabled_)
continue;
if(sub->name_.empty() && sub->required_ == false) {
if(sub->count_all() == 0) {
if(require_option_min_ > 0 && require_option_min_ <= used_options) {
continue;
// if we have met the requirement and there is nothing in this option group skip checking
// requirements
}
if(require_option_max_ > 0 && used_options >= require_option_min_) {
continue;
// if we have met the requirement and there is nothing in this option group skip checking
// requirements
}
}
}
if(sub->count() > 0 || sub->name_.empty()) {
sub->_process_requirements();
}
if(sub->required_ && sub->count_all() == 0) {
throw(CLI::RequiredError(sub->get_display_name()));
}
}
}
/// Process callbacks and such.
void _process() {
_process_ini();
_process_env();
_process_callbacks();
_process_help_flags();
_process_requirements();
}
/// Throw an error if anything is left over and should not be.
void _process_extras() {
if(!(allow_extras_ || prefix_command_)) {
size_t num_left_over = remaining_size();
if(num_left_over > 0) {
throw ExtrasError(remaining(false));
}
}
for(App_p &sub : subcommands_) {
if(sub->count() > 0)
sub->_process_extras();
}
}
/// Throw an error if anything is left over and should not be.
/// Modifies the args to fill in the missing items before throwing.
void _process_extras(std::vector<std::string> &args) {
if(!(allow_extras_ || prefix_command_)) {
size_t num_left_over = remaining_size();
if(num_left_over > 0) {
args = remaining(false);
throw ExtrasError(args);
}
}
for(App_p &sub : subcommands_) {
if(sub->count() > 0)
sub->_process_extras(args);
}
}
/// Internal function to recursively increment the parsed counter on the current app as well unnamed subcommands
void increment_parsed() {
++parsed_;
for(App_p &sub : subcommands_) {
if(sub->get_name().empty())
sub->increment_parsed();
}
}
/// Internal parse function
void _parse(std::vector<std::string> &args) {
increment_parsed();
_trigger_pre_parse(args.size());
bool positional_only = false;
while(!args.empty()) {
if(!_parse_single(args, positional_only)) {
break;
}
}
if(parent_ == nullptr) {
_process();
// Throw error if any items are left over (depending on settings)
_process_extras(args);
// Convert missing (pairs) to extras (string only) ready for processing in another app
args = remaining_for_passthrough(false);
} else if(immediate_callback_) {
_process_env();
_process_callbacks();
_process_help_flags();
_process_requirements();
run_callback();
}
}
/// Internal parse function
void _parse(std::vector<std::string> &&args) {
// this can only be called by the top level in which case parent == nullptr by definition
// operation is simplified
increment_parsed();
_trigger_pre_parse(args.size());
bool positional_only = false;
while(!args.empty()) {
_parse_single(args, positional_only);
}
_process();
// Throw error if any items are left over (depending on settings)
_process_extras();
}
/// Parse one config param, return false if not found in any subcommand, remove if it is
///
/// If this has more than one dot.separated.name, go into the subcommand matching it
/// Returns true if it managed to find the option, if false you'll need to remove the arg manually.
void _parse_config(std::vector<ConfigItem> &args) {
for(ConfigItem item : args) {
if(!_parse_single_config(item) && !allow_config_extras_)
throw ConfigError::Extras(item.fullname());
}
}
/// Fill in a single config option
bool _parse_single_config(const ConfigItem &item, size_t level = 0) {
if(level < item.parents.size()) {
try {
auto subcom = get_subcommand(item.parents.at(level));
return subcom->_parse_single_config(item, level + 1);
} catch(const OptionNotFound &) {
return false;
}
}
Option *op = get_option_no_throw("--" + item.name);
if(op == nullptr) {
// If the option was not present
if(get_allow_config_extras())
// Should we worry about classifying the extras properly?
missing_.emplace_back(detail::Classifier::NONE, item.fullname());
return false;
}
if(!op->get_configurable())
throw ConfigError::NotConfigurable(item.fullname());
if(op->empty()) {
// Flag parsing
if(op->get_type_size() == 0) {
auto res = config_formatter_->to_flag(item);
res = op->get_flag_value(item.name, res);
op->add_result(res);
} else {
op->add_result(item.inputs);
op->run_callback();
}
}
return true;
}
/// Parse "one" argument (some may eat more than one), delegate to parent if fails, add to missing if missing
/// from master return false if the parse has failed and needs to return to parent
bool _parse_single(std::vector<std::string> &args, bool &positional_only) {
bool retval = true;
detail::Classifier classifier = positional_only ? detail::Classifier::NONE : _recognize(args.back());
switch(classifier) {
case detail::Classifier::POSITIONAL_MARK:
args.pop_back();
positional_only = true;
if((!_has_remaining_positionals()) && (parent_ != nullptr)) {
retval = false;
} else {
_move_to_missing(classifier, "--");
}
break;
case detail::Classifier::SUBCOMMAND_TERMINATOR:
// treat this like a positional mark if in the parent app
args.pop_back();
retval = false;
break;
case detail::Classifier::SUBCOMMAND:
retval = _parse_subcommand(args);
break;
case detail::Classifier::LONG:
case detail::Classifier::SHORT:
case detail::Classifier::WINDOWS:
// If already parsed a subcommand, don't accept options_
_parse_arg(args, classifier);
break;
case detail::Classifier::NONE:
// Probably a positional or something for a parent (sub)command
retval = _parse_positional(args);
if(retval && positionals_at_end_) {
positional_only = true;
}
break;
// LCOV_EXCL_START
default:
HorribleError("unrecognized classifier (you should not see this!)");
// LCOV_EXCL_END
}
return retval;
}
/// Count the required remaining positional arguments
size_t _count_remaining_positionals(bool required_only = false) const {
size_t retval = 0;
for(const Option_p &opt : options_)
if(opt->get_positional() && (!required_only || opt->get_required()) && opt->get_items_expected() > 0 &&
static_cast<int>(opt->count()) < opt->get_items_expected())
retval = static_cast<size_t>(opt->get_items_expected()) - opt->count();
return retval;
}
/// Count the required remaining positional arguments
bool _has_remaining_positionals() const {
for(const Option_p &opt : options_)
if(opt->get_positional() &&
((opt->get_items_expected() < 0) || ((static_cast<int>(opt->count()) < opt->get_items_expected()))))
return true;
return false;
}
/// Parse a positional, go up the tree to check
/// Return true if the positional was used false otherwise
bool _parse_positional(std::vector<std::string> &args) {
const std::string &positional = args.back();
for(const Option_p &opt : options_) {
// Eat options, one by one, until done
if(opt->get_positional() &&
(static_cast<int>(opt->count()) < opt->get_items_expected() || opt->get_items_expected() < 0)) {
if(validate_positionals_) {
std::string pos = positional;
pos = opt->_validate(pos);
if(!pos.empty()) {
continue;
}
}
opt->add_result(positional);
parse_order_.push_back(opt.get());
args.pop_back();
return true;
}
}
for(auto &subc : subcommands_) {
if((subc->name_.empty()) && (!subc->disabled_)) {
if(subc->_parse_positional(args)) {
if(!subc->pre_parse_called_) {
subc->_trigger_pre_parse(args.size());
}
return true;
}
}
}
// let the parent deal with it if possible
if(parent_ != nullptr && fallthrough_)
return _get_fallthrough_parent()->_parse_positional(args);
/// Try to find a local subcommand that is repeated
auto com = _find_subcommand(args.back(), true, false);
if(com != nullptr && (require_subcommand_max_ == 0 || require_subcommand_max_ > parsed_subcommands_.size())) {
args.pop_back();
com->_parse(args);
return true;
}
/// now try one last gasp at subcommands that have been executed before, go to root app and try to find a
/// subcommand in a broader way, if one exists let the parent deal with it
auto parent_app = (parent_ != nullptr) ? _get_fallthrough_parent() : this;
com = parent_app->_find_subcommand(args.back(), true, false);
if(com != nullptr && (com->parent_->require_subcommand_max_ == 0 ||
com->parent_->require_subcommand_max_ > com->parent_->parsed_subcommands_.size())) {
return false;
}
if(positionals_at_end_) {
throw CLI::ExtrasError(args);
}
/// If this is an option group don't deal with it
if(parent_ != nullptr && name_.empty()) {
return false;
}
/// We are out of other options this goes to missing
_move_to_missing(detail::Classifier::NONE, positional);
args.pop_back();
if(prefix_command_) {
while(!args.empty()) {
_move_to_missing(detail::Classifier::NONE, args.back());
args.pop_back();
}
}
return true;
}
/// Locate a subcommand by name with two conditions, should disabled subcommands be ignored, and should used
/// subcommands be ignored
App *_find_subcommand(const std::string &subc_name, bool ignore_disabled, bool ignore_used) const noexcept {
for(const App_p &com : subcommands_) {
if(com->disabled_ && ignore_disabled)
continue;
if(com->get_name().empty()) {
auto subc = com->_find_subcommand(subc_name, ignore_disabled, ignore_used);
if(subc != nullptr) {
return subc;
}
} else if(com->check_name(subc_name)) {
if((!*com) || !ignore_used)
return com.get();
}
}
return nullptr;
}
/// Parse a subcommand, modify args and continue
///
/// Unlike the others, this one will always allow fallthrough
/// return true if the subcommand was processed false otherwise
bool _parse_subcommand(std::vector<std::string> &args) {
if(_count_remaining_positionals(/* required */ true) > 0) {
_parse_positional(args);
return true;
}
auto com = _find_subcommand(args.back(), true, true);
if(com != nullptr) {
args.pop_back();
parsed_subcommands_.push_back(com);
com->_parse(args);
auto parent_app = com->parent_;
while(parent_app != this) {
parent_app->_trigger_pre_parse(args.size());
parent_app->parsed_subcommands_.push_back(com);
parent_app = parent_app->parent_;
}
return true;
}
if(parent_ == nullptr)
throw HorribleError("Subcommand " + args.back() + " missing");
return false;
}
/// Parse a short (false) or long (true) argument, must be at the top of the list
/// return true if the argument was processed or false if nothing was done
bool _parse_arg(std::vector<std::string> &args, detail::Classifier current_type) {
std::string current = args.back();
std::string arg_name;
std::string value;
std::string rest;
switch(current_type) {
case detail::Classifier::LONG:
if(!detail::split_long(current, arg_name, value))
throw HorribleError("Long parsed but missing (you should not see this):" + args.back());
break;
case detail::Classifier::SHORT:
if(!detail::split_short(current, arg_name, rest))
throw HorribleError("Short parsed but missing! You should not see this");
break;
case detail::Classifier::WINDOWS:
if(!detail::split_windows_style(current, arg_name, value))
throw HorribleError("windows option parsed but missing! You should not see this");
break;
case detail::Classifier::SUBCOMMAND:
case detail::Classifier::POSITIONAL_MARK:
case detail::Classifier::NONE:
default:
throw HorribleError("parsing got called with invalid option! You should not see this");
}
auto op_ptr =
std::find_if(std::begin(options_), std::end(options_), [arg_name, current_type](const Option_p &opt) {
if(current_type == detail::Classifier::LONG)
return opt->check_lname(arg_name);
if(current_type == detail::Classifier::SHORT)
return opt->check_sname(arg_name);
// this will only get called for detail::Classifier::WINDOWS
return opt->check_lname(arg_name) || opt->check_sname(arg_name);
});
// Option not found
if(op_ptr == std::end(options_)) {
for(auto &subc : subcommands_) {
if(subc->name_.empty() && !subc->disabled_) {
if(subc->_parse_arg(args, current_type)) {
if(!subc->pre_parse_called_) {
subc->_trigger_pre_parse(args.size());
}
return true;
}
}
}
// If a subcommand, try the master command
if(parent_ != nullptr && fallthrough_)
return _get_fallthrough_parent()->_parse_arg(args, current_type);
// don't capture missing if this is a nameless subcommand
if(parent_ != nullptr && name_.empty()) {
return false;
}
// Otherwise, add to missing
args.pop_back();
_move_to_missing(current_type, current);
return true;
}
args.pop_back();
// Get a reference to the pointer to make syntax bearable
Option_p &op = *op_ptr;
int num = op->get_items_expected();
// Make sure we always eat the minimum for unlimited vectors
int collected = 0;
int result_count = 0;
// deal with flag like things
if(num == 0) {
auto res = op->get_flag_value(arg_name, value);
op->add_result(res);
parse_order_.push_back(op.get());
}
// --this=value
else if(!value.empty()) {
op->add_result(value, result_count);
parse_order_.push_back(op.get());
collected += result_count;
// If exact number expected
if(num > 0)
num = (num >= result_count) ? num - result_count : 0;
// -Trest
} else if(!rest.empty()) {
op->add_result(rest, result_count);
parse_order_.push_back(op.get());
rest = "";
collected += result_count;
// If exact number expected
if(num > 0)
num = (num >= result_count) ? num - result_count : 0;
}
// Unlimited vector parser
if(num < 0) {
while(!args.empty() && _recognize(args.back(), false) == detail::Classifier::NONE) {
if(collected >= -num) {
// We could break here for allow extras, but we don't
// If any positionals remain, don't keep eating
if(_count_remaining_positionals() > 0)
break;
}
op->add_result(args.back(), result_count);
parse_order_.push_back(op.get());
args.pop_back();
collected += result_count;
}
// Allow -- to end an unlimited list and "eat" it
if(!args.empty() && _recognize(args.back()) == detail::Classifier::POSITIONAL_MARK)
args.pop_back();
} else {
while(num > 0 && !args.empty()) {
std::string current_ = args.back();
args.pop_back();
op->add_result(current_, result_count);
parse_order_.push_back(op.get());
num -= result_count;
}
if(num > 0) {
throw ArgumentMismatch::TypedAtLeast(op->get_name(), num, op->get_type_name());
}
}
if(!rest.empty()) {
rest = "-" + rest;
args.push_back(rest);
}
return true;
}
/// Trigger the pre_parse callback if needed
void _trigger_pre_parse(size_t remaining_args) {
if(!pre_parse_called_) {
pre_parse_called_ = true;
if(pre_parse_callback_) {
pre_parse_callback_(remaining_args);
}
} else if(immediate_callback_) {
if(!name_.empty()) {
auto pcnt = parsed_;
auto extras = std::move(missing_);
clear();
parsed_ = pcnt;
pre_parse_called_ = true;
missing_ = std::move(extras);
}
}
}
/// Get the appropriate parent to fallthrough to which is the first one that has a name or the main app
App *_get_fallthrough_parent() {
if(parent_ == nullptr) {
throw(HorribleError("No Valid parent"));
}
auto fallthrough_parent = parent_;
while((fallthrough_parent->parent_ != nullptr) && (fallthrough_parent->get_name().empty())) {
fallthrough_parent = fallthrough_parent->parent_;
}
return fallthrough_parent;
}
/// Helper function to place extra values in the most appropriate position
void _move_to_missing(detail::Classifier val_type, const std::string &val) {
if(allow_extras_ || subcommands_.empty()) {
missing_.emplace_back(val_type, val);
return;
}
// allow extra arguments to be places in an option group if it is allowed there
for(auto &subc : subcommands_) {
if(subc->name_.empty() && subc->allow_extras_) {
subc->missing_.emplace_back(val_type, val);
return;
}
}
// if we haven't found any place to put them yet put them in missing
missing_.emplace_back(val_type, val);
}
public:
/// function that could be used by subclasses of App to shift options around into subcommands
void _move_option(Option *opt, App *app) {
if(opt == nullptr) {
throw OptionNotFound("the option is NULL");
}
// verify that the give app is actually a subcommand
bool found = false;
for(auto &subc : subcommands_) {
if(app == subc.get()) {
found = true;
}
}
if(!found) {
throw OptionNotFound("The Given app is not a subcommand");
}
if((help_ptr_ == opt) || (help_all_ptr_ == opt))
throw OptionAlreadyAdded("cannot move help options");
if(config_ptr_ == opt)
throw OptionAlreadyAdded("cannot move config file options");
auto iterator =
std::find_if(std::begin(options_), std::end(options_), [opt](const Option_p &v) { return v.get() == opt; });
if(iterator != std::end(options_)) {
const auto &opt_p = *iterator;
if(std::find_if(std::begin(app->options_), std::end(app->options_), [&opt_p](const Option_p &v) {
return (*v == *opt_p);
}) == std::end(app->options_)) {
// only erase after the insertion was successful
app->options_.push_back(std::move(*iterator));
options_.erase(iterator);
} else {
throw OptionAlreadyAdded(opt->get_name());
}
} else {
throw OptionNotFound("could not locate the given App");
}
}
};
/// Extension of App to better manage groups of options
class Option_group : public App {
public:
Option_group(std::string group_description, std::string group_name, App *parent)
: App(std::move(group_description), "", parent) {
group(group_name);
// option groups should have automatic fallthrough
}
using App::add_option;
/// Add an existing option to the Option_group
Option *add_option(Option *opt) {
if(get_parent() == nullptr) {
throw OptionNotFound("Unable to locate the specified option");
}
get_parent()->_move_option(opt, this);
return opt;
}
/// Add an existing option to the Option_group
void add_options(Option *opt) { add_option(opt); }
/// Add a bunch of options to the group
template <typename... Args> void add_options(Option *opt, Args... args) {
add_option(opt);
add_options(args...);
}
using App::add_subcommand;
/// Add an existing subcommand to be a member of an option_group
App *add_subcommand(App *subcom) {
App_p subc = subcom->get_parent()->get_subcommand_ptr(subcom);
subc->get_parent()->remove_subcommand(subcom);
add_subcommand(std::move(subc));
return subcom;
}
};
/// Helper function to enable one option group/subcommand when another is used
inline void TriggerOn(App *trigger_app, App *app_to_enable) {
app_to_enable->enabled_by_default(false);
app_to_enable->disabled_by_default();
trigger_app->preparse_callback([app_to_enable](size_t) { app_to_enable->disabled(false); });
}
/// Helper function to enable one option group/subcommand when another is used
inline void TriggerOn(App *trigger_app, std::vector<App *> apps_to_enable) {
for(auto &app : apps_to_enable) {
app->enabled_by_default(false);
app->disabled_by_default();
}
trigger_app->preparse_callback([apps_to_enable](size_t) {
for(auto &app : apps_to_enable) {
app->disabled(false);
}
});
}
/// Helper function to disable one option group/subcommand when another is used
inline void TriggerOff(App *trigger_app, App *app_to_enable) {
app_to_enable->disabled_by_default(false);
app_to_enable->enabled_by_default();
trigger_app->preparse_callback([app_to_enable](size_t) { app_to_enable->disabled(); });
}
/// Helper function to disable one option group/subcommand when another is used
inline void TriggerOff(App *trigger_app, std::vector<App *> apps_to_enable) {
for(auto &app : apps_to_enable) {
app->disabled_by_default(false);
app->enabled_by_default();
}
trigger_app->preparse_callback([apps_to_enable](size_t) {
for(auto &app : apps_to_enable) {
app->disabled();
}
});
}
namespace FailureMessage {
/// Printout a clean, simple message on error (the default in CLI11 1.5+)
inline std::string simple(const App *app, const Error &e) {
std::string header = std::string(e.what()) + "\n";
std::vector<std::string> names;
// Collect names
if(app->get_help_ptr() != nullptr)
names.push_back(app->get_help_ptr()->get_name());
if(app->get_help_all_ptr() != nullptr)
names.push_back(app->get_help_all_ptr()->get_name());
// If any names found, suggest those
if(!names.empty())
header += "Run with " + detail::join(names, " or ") + " for more information.\n";
return header;
}
/// Printout the full help string on error (if this fn is set, the old default for CLI11)
inline std::string help(const App *app, const Error &e) {
std::string header = std::string("ERROR: ") + e.get_name() + ": " + e.what() + "\n";
header += app->help();
return header;
}
} // namespace FailureMessage
namespace detail {
/// This class is simply to allow tests access to App's protected functions
struct AppFriend {
/// Wrap _parse_short, perfectly forward arguments and return
template <typename... Args>
static auto parse_arg(App *app, Args &&... args) ->
typename std::result_of<decltype (&App::_parse_arg)(App, Args...)>::type {
return app->_parse_arg(std::forward<Args>(args)...);
}
/// Wrap _parse_subcommand, perfectly forward arguments and return
template <typename... Args>
static auto parse_subcommand(App *app, Args &&... args) ->
typename std::result_of<decltype (&App::_parse_subcommand)(App, Args...)>::type {
return app->_parse_subcommand(std::forward<Args>(args)...);
}
/// Wrap the fallthrough parent function to make sure that is working correctly
static App *get_fallthrough_parent(App *app) { return app->_get_fallthrough_parent(); }
};
} // namespace detail
} // namespace CLI
// From CLI/Config.hpp:
namespace CLI {
inline std::string
ConfigINI::to_config(const App *app, bool default_also, bool write_description, std::string prefix) const {
std::stringstream out;
for(const Option *opt : app->get_options({})) {
// Only process option with a long-name and configurable
if(!opt->get_lnames().empty() && opt->get_configurable()) {
std::string name = prefix + opt->get_lnames()[0];
std::string value;
// Non-flags
if(opt->get_type_size() != 0) {
// If the option was found on command line
if(opt->count() > 0)
value = detail::ini_join(opt->results());
// If the option has a default and is requested by optional argument
else if(default_also && !opt->get_default_str().empty())
value = opt->get_default_str();
// Flag, one passed
} else if(opt->count() == 1) {
value = "true";
// Flag, multiple passed
} else if(opt->count() > 1) {
value = std::to_string(opt->count());
// Flag, not present
} else if(opt->count() == 0 && default_also) {
value = "false";
}
if(!value.empty()) {
if(write_description && opt->has_description()) {
if(static_cast<int>(out.tellp()) != 0) {
out << std::endl;
}
out << "; " << detail::fix_newlines("; ", opt->get_description()) << std::endl;
}
// Don't try to quote anything that is not size 1
if(opt->get_items_expected() != 1)
out << name << "=" << value << std::endl;
else
out << name << "=" << detail::add_quotes_if_needed(value) << std::endl;
}
}
}
for(const App *subcom : app->get_subcommands({}))
out << to_config(subcom, default_also, write_description, prefix + subcom->get_name() + ".");
return out.str();
}
} // namespace CLI
// From CLI/Formatter.hpp:
namespace CLI {
inline std::string
Formatter::make_group(std::string group, bool is_positional, std::vector<const Option *> opts) const {
std::stringstream out;
out << "\n" << group << ":\n";
for(const Option *opt : opts) {
out << make_option(opt, is_positional);
}
return out.str();
}
inline std::string Formatter::make_positionals(const App *app) const {
std::vector<const Option *> opts =
app->get_options([](const Option *opt) { return !opt->get_group().empty() && opt->get_positional(); });
if(opts.empty())
return std::string();
else
return make_group(get_label("Positionals"), true, opts);
}
inline std::string Formatter::make_groups(const App *app, AppFormatMode mode) const {
std::stringstream out;
std::vector<std::string> groups = app->get_groups();
// Options
for(const std::string &group : groups) {
std::vector<const Option *> opts = app->get_options([app, mode, &group](const Option *opt) {
return opt->get_group() == group // Must be in the right group
&& opt->nonpositional() // Must not be a positional
&& (mode != AppFormatMode::Sub // If mode is Sub, then
|| (app->get_help_ptr() != opt // Ignore help pointer
&& app->get_help_all_ptr() != opt)); // Ignore help all pointer
});
if(!group.empty() && !opts.empty()) {
out << make_group(group, false, opts);
if(group != groups.back())
out << "\n";
}
}
return out.str();
}
inline std::string Formatter::make_description(const App *app) const {
std::string desc = app->get_description();
auto min_options = app->get_require_option_min();
auto max_options = app->get_require_option_max();
if(app->get_required()) {
desc += " REQUIRED ";
}
if((max_options == min_options) && (min_options > 0)) {
if(min_options == 1) {
desc += " \n[Exactly 1 of the following options is required]";
} else {
desc += " \n[Exactly " + std::to_string(min_options) + "options from the following list are required]";
}
} else if(max_options > 0) {
if(min_options > 0) {
desc += " \n[Between " + std::to_string(min_options) + " and " + std::to_string(max_options) +
" of the follow options are required]";
} else {
desc += " \n[At most " + std::to_string(max_options) + " of the following options are allowed]";
}
} else if(min_options > 0) {
desc += " \n[At least " + std::to_string(min_options) + " of the following options are required]";
}
return (!desc.empty()) ? desc + "\n" : std::string{};
}
inline std::string Formatter::make_usage(const App *app, std::string name) const {
std::stringstream out;
out << get_label("Usage") << ":" << (name.empty() ? "" : " ") << name;
std::vector<std::string> groups = app->get_groups();
// Print an Options badge if any options exist
std::vector<const Option *> non_pos_options =
app->get_options([](const Option *opt) { return opt->nonpositional(); });
if(!non_pos_options.empty())
out << " [" << get_label("OPTIONS") << "]";
// Positionals need to be listed here
std::vector<const Option *> positionals = app->get_options([](const Option *opt) { return opt->get_positional(); });
// Print out positionals if any are left
if(!positionals.empty()) {
// Convert to help names
std::vector<std::string> positional_names(positionals.size());
std::transform(positionals.begin(), positionals.end(), positional_names.begin(), [this](const Option *opt) {
return make_option_usage(opt);
});
out << " " << detail::join(positional_names, " ");
}
// Add a marker if subcommands are expected or optional
if(!app->get_subcommands(
[](const CLI::App *subc) { return ((!subc->get_disabled()) && (!subc->get_name().empty())); })
.empty()) {
out << " " << (app->get_require_subcommand_min() == 0 ? "[" : "")
<< get_label(app->get_require_subcommand_max() < 2 || app->get_require_subcommand_min() > 1 ? "SUBCOMMAND"
: "SUBCOMMANDS")
<< (app->get_require_subcommand_min() == 0 ? "]" : "");
}
out << std::endl;
return out.str();
}
inline std::string Formatter::make_footer(const App *app) const {
std::string footer = app->get_footer();
if(!footer.empty())
return footer + "\n";
else
return "";
}
inline std::string Formatter::make_help(const App *app, std::string name, AppFormatMode mode) const {
// This immediately forwards to the make_expanded method. This is done this way so that subcommands can
// have overridden formatters
if(mode == AppFormatMode::Sub)
return make_expanded(app);
std::stringstream out;
if((app->get_name().empty()) && (app->get_parent() != nullptr)) {
if(app->get_group() != "Subcommands") {
out << app->get_group() << ':';
}
}
out << make_description(app);
out << make_usage(app, name);
out << make_positionals(app);
out << make_groups(app, mode);
out << make_subcommands(app, mode);
out << make_footer(app);
return out.str();
}
inline std::string Formatter::make_subcommands(const App *app, AppFormatMode mode) const {
std::stringstream out;
std::vector<const App *> subcommands = app->get_subcommands({});
// Make a list in definition order of the groups seen
std::vector<std::string> subcmd_groups_seen;
for(const App *com : subcommands) {
if(com->get_name().empty()) {
out << make_expanded(com);
continue;
}
std::string group_key = com->get_group();
if(!group_key.empty() &&
std::find_if(subcmd_groups_seen.begin(), subcmd_groups_seen.end(), [&group_key](std::string a) {
return detail::to_lower(a) == detail::to_lower(group_key);
}) == subcmd_groups_seen.end())
subcmd_groups_seen.push_back(group_key);
}
// For each group, filter out and print subcommands
for(const std::string &group : subcmd_groups_seen) {
out << "\n" << group << ":\n";
std::vector<const App *> subcommands_group = app->get_subcommands(
[&group](const App *sub_app) { return detail::to_lower(sub_app->get_group()) == detail::to_lower(group); });
for(const App *new_com : subcommands_group) {
if(new_com->get_name().empty())
continue;
if(mode != AppFormatMode::All) {
out << make_subcommand(new_com);
} else {
out << new_com->help(new_com->get_name(), AppFormatMode::Sub);
out << "\n";
}
}
}
return out.str();
}
inline std::string Formatter::make_subcommand(const App *sub) const {
std::stringstream out;
detail::format_help(out, sub->get_name(), sub->get_description(), column_width_);
return out.str();
}
inline std::string Formatter::make_expanded(const App *sub) const {
std::stringstream out;
out << sub->get_display_name() << "\n";
out << make_description(sub);
out << make_positionals(sub);
out << make_groups(sub, AppFormatMode::Sub);
out << make_subcommands(sub, AppFormatMode::Sub);
// Drop blank spaces
std::string tmp = detail::find_and_replace(out.str(), "\n\n", "\n");
tmp = tmp.substr(0, tmp.size() - 1); // Remove the final '\n'
// Indent all but the first line (the name)
return detail::find_and_replace(tmp, "\n", "\n ") + "\n";
}
inline std::string Formatter::make_option_name(const Option *opt, bool is_positional) const {
if(is_positional)
return opt->get_name(true, false);
else
return opt->get_name(false, true);
}
inline std::string Formatter::make_option_opts(const Option *opt) const {
std::stringstream out;
if(opt->get_type_size() != 0) {
if(!opt->get_type_name().empty())
out << " " << get_label(opt->get_type_name());
if(!opt->get_default_str().empty())
out << "=" << opt->get_default_str();
if(opt->get_expected() > 1)
out << " x " << opt->get_expected();
if(opt->get_expected() == -1)
out << " ...";
if(opt->get_required())
out << " " << get_label("REQUIRED");
}
if(!opt->get_envname().empty())
out << " (" << get_label("Env") << ":" << opt->get_envname() << ")";
if(!opt->get_needs().empty()) {
out << " " << get_label("Needs") << ":";
for(const Option *op : opt->get_needs())
out << " " << op->get_name();
}
if(!opt->get_excludes().empty()) {
out << " " << get_label("Excludes") << ":";
for(const Option *op : opt->get_excludes())
out << " " << op->get_name();
}
return out.str();
}
inline std::string Formatter::make_option_desc(const Option *opt) const { return opt->get_description(); }
inline std::string Formatter::make_option_usage(const Option *opt) const {
// Note that these are positionals usages
std::stringstream out;
out << make_option_name(opt, true);
if(opt->get_expected() > 1)
out << "(" << std::to_string(opt->get_expected()) << "x)";
else if(opt->get_expected() < 0)
out << "...";
return opt->get_required() ? out.str() : "[" + out.str() + "]";
}
} // namespace CLI
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