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Merge pull request #2 from sametersoylu/v3/clearapi

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V3/clearapi
This commit is contained in:
Abdüssamet ERSOYLU
2026-03-16 18:10:46 +04:00
committed by GitHub
parent 061581c510 a12840b241
commit 282c1c6314
34 changed files with 1521 additions and 1323 deletions
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12
.clang-format Normal file
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---
Language: Cpp
BasedOnStyle: LLVM
UseTab: Always
TabWidth: 4
IndentWidth: 4
NamespaceIndentation: All
AccessModifierOffset: -4
BreakBeforeBraces: Attach
AllowShortFunctionsOnASingleLine: Empty
ColumnLimit: 120
...

18
CMakeLists.txt
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@@ -2,18 +2,20 @@ cmake_minimum_required(VERSION 3.15)
project(argument_parser) project(argument_parser)
set(CMAKE_CXX_STANDARD 23) set(CMAKE_CXX_STANDARD 17)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/bin) set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/bin)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_Release ${CMAKE_CURRENT_SOURCE_DIR}/bin/release) set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_Release ${CMAKE_CURRENT_SOURCE_DIR}/bin/release)
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_Debug ${CMAKE_CURRENT_SOURCE_DIR}/bin/debug) set(CMAKE_RUNTIME_OUTPUT_DIRECTORY_Debug ${CMAKE_CURRENT_SOURCE_DIR}/bin/debug)
set(CMAKE_EXPORT_COMPILE_COMMANDS ON) set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
include_directories(include) include_directories(src/headers)
include_directories(include/parser) include_directories(src/headers/parser)
include_directories(include/conventions) include_directories(src/headers/conventions)
include_directories(include/conventions/implementations) include_directories(src/headers/conventions/implementations)
include_directories(include/parser/platform_headers) include_directories(src/headers/parser/platform_headers)
include_directories(include/parser/parsing_traits) include_directories(src/headers/parser/parsing_traits)
add_executable(test src/main.cpp) file(GLOB_RECURSE SRC_FILES "src/source/*.cpp" "src/source/**/*.cpp" "src/source/**/**/*.cpp")
add_executable(test src/main.cpp ${SRC_FILES})

14
compile_commands.json
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@@ -1,8 +1,8 @@
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"directory": "/Users/killua/Projects/argument-parser/build", "directory": "C:/Users/samet/Documents/CPP/argparser/argument-parser/build",
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"file": "/Users/killua/Projects/argument-parser/src/main.cpp", "file": "C:/Users/samet/Documents/CPP/argparser/argument-parser/src/main.cpp",
"output": "/Users/killua/Projects/argument-parser/build/CMakeFiles/test.dir/src/main.cpp.o" "output": "C:/Users/samet/Documents/CPP/argparser/argument-parser/build/CMakeFiles/test.dir/src/main.cpp.obj"
} }
] ]

49
include/conventions/base_convention.hpp
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#pragma once
#include <string>
#include <algorithm>
#include <utility>
#ifndef BASE_CONVENTION_HPP
#define BASE_CONVENTION_HPP
namespace argument_parser::conventions {
enum class argument_type {
SHORT,
LONG,
POSITIONAL,
INTERCHANGABLE,
ERROR
};
using parsed_argument = std::pair<argument_type, std::string>;
class base_convention {
public:
virtual std::string extract_value(std::string const&) const = 0;
virtual parsed_argument get_argument(std::string const&) const = 0;
virtual bool requires_next_token() const = 0;
virtual std::string name() const = 0;
virtual std::string short_prec() const = 0;
virtual std::string long_prec() const = 0;
protected:
base_convention() = default;
~base_convention() = default;
};
using convention = base_convention;
}
namespace argument_parser::conventions::helpers {
static std::string to_lower(std::string s) {
std::transform(s.begin(), s.end(), s.begin(),
[](unsigned char c) { return std::tolower(c); });
return s;
}
static std::string to_upper(std::string s) {
std::transform(s.begin(), s.end(), s.begin(),
[](unsigned char c) { return std::toupper(c); });
return s;
}
}
#endif

98
include/conventions/implementations/gnu_argument_convention.hpp
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@@ -1,98 +0,0 @@
#pragma once
#include "base_convention.hpp"
#include <stdexcept>
#ifndef GNU_ARGUMENT_CONVENTION_HPP
#define GNU_ARGUMENT_CONVENTION_HPP
namespace argument_parser::conventions::implementations {
class gnu_argument_convention : public base_convention {
public:
parsed_argument get_argument(std::string const& raw) const override {
if (raw.starts_with(long_prec()))
return {argument_type::LONG, raw.substr(2)};
else if (raw.starts_with(short_prec()))
return {argument_type::SHORT, raw.substr(1)};
else
return {argument_type::ERROR, "GNU standard convention does not allow arguments without a preceding dash."};
}
std::string extract_value(std::string const& /*raw*/) const override {
// In non-equal GNU, value comes in next token
throw std::runtime_error("No inline value in standard GNU convention.");
}
bool requires_next_token() const override {
return true;
}
std::string name() const override {
return "GNU-style long options";
}
std::string short_prec() const override {
return "-";
}
std::string long_prec() const override {
return "--";
}
static gnu_argument_convention instance;
private:
gnu_argument_convention() = default;
};
class gnu_equal_argument_convention : public base_convention {
public:
parsed_argument get_argument(std::string const& raw) const override {
auto pos = raw.find('=');
auto arg = pos != std::string::npos ? raw.substr(0, pos) : raw;
if (arg.starts_with(long_prec()))
return {argument_type::LONG, arg.substr(2) };
else if (arg.starts_with(short_prec()))
return {argument_type::SHORT, arg.substr(1) };
else
return {argument_type::ERROR, "GNU standard convention does not allow arguments without a preceding dash."};
}
std::string extract_value(std::string const& raw) const override {
auto pos = raw.find('=');
if (pos == std::string::npos || pos + 1 >= raw.size())
throw std::runtime_error("Expected value after '='.");
return raw.substr(pos + 1);
}
bool requires_next_token() const override {
return false;
}
std::string name() const override {
return "GNU-style long options (equal signed form)";
}
std::string short_prec() const override {
return "-";
}
std::string long_prec() const override {
return "--";
}
static gnu_equal_argument_convention instance;
private:
gnu_equal_argument_convention() = default;
};
inline gnu_argument_convention gnu_argument_convention::instance{};
inline gnu_equal_argument_convention gnu_equal_argument_convention::instance{};
}
namespace argument_parser::conventions {
static inline const implementations::gnu_argument_convention gnu_argument_convention = implementations::gnu_argument_convention::instance;
static inline const implementations::gnu_equal_argument_convention gnu_equal_argument_convention = implementations::gnu_equal_argument_convention::instance;
}
#endif

120
include/conventions/implementations/windows_argument_convention.hpp
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@@ -1,120 +0,0 @@
#pragma once
#include "base_convention.hpp"
#include <stdexcept>
#ifndef WINDOWS_ARGUMENT_CONVENTION_HPP
#define WINDOWS_ARGUMENT_CONVENTION_HPP
#ifndef ALLOW_DASH_FOR_WINDOWS
#define ALLOW_DASH_FOR_WINDOWS 1
#endif
namespace argument_parser::conventions::implementations {
class windows_argument_convention : public base_convention {
public:
explicit windows_argument_convention(bool accept_dash = true)
: accept_dash_(accept_dash) {
}
parsed_argument get_argument(std::string const& raw) const override {
if (raw.empty()) {
return { argument_type::ERROR, "Empty argument token." };
}
const char c0 = raw[0];
const bool ok_prefix = (c0 == '/') || (accept_dash_ && c0 == '-');
if (!ok_prefix) {
return { argument_type::ERROR,
accept_dash_
? "Windows-style expects options to start with '/' (or '-' in compat mode)."
: "Windows-style expects options to start with '/'." };
}
if (raw.find_first_of("=:") != std::string::npos) {
return { argument_type::ERROR,
"Inline values are not allowed in this convention; provide the value in the next token." };
}
std::string name = helpers::to_lower(raw.substr(1));
if (name.empty()) {
return { argument_type::ERROR, "Option name cannot be empty after '/'." };
}
return { argument_type::INTERCHANGABLE, std::move(name) };
}
std::string extract_value(std::string const& /*raw*/) const override {
throw std::runtime_error("No inline value; value must be provided in the next token.");
}
bool requires_next_token() const override { return true; }
std::string name() const override { return "Windows style options (next-token values)"; }
std::string short_prec() const override { return accept_dash_ ? "-" : "/"; }
std::string long_prec() const override { return "/"; }
static windows_argument_convention instance;
private:
bool accept_dash_;
};
class windows_kv_argument_convention : public base_convention {
public:
explicit windows_kv_argument_convention(bool accept_dash = true)
: accept_dash_(accept_dash) {
}
parsed_argument get_argument(std::string const& raw) const override {
if (raw.empty()) {
return { argument_type::ERROR, "Empty argument token." };
}
const char c0 = raw[0];
const bool ok_prefix = (c0 == '/') || (accept_dash_ && c0 == '-');
if (!ok_prefix) {
return { argument_type::ERROR,
accept_dash_
? "Windows-style expects options to start with '/' (or '-' in compat mode)."
: "Windows-style expects options to start with '/'." };
}
const std::size_t sep = raw.find_first_of("=:");
if (sep == std::string::npos) {
return { argument_type::ERROR,
"Expected an inline value using '=' or ':' (e.g., /opt=value or /opt:value)." };
}
if (sep == 1) {
return { argument_type::ERROR, "Option name cannot be empty before '=' or ':'." };
}
std::string name = helpers::to_lower(raw.substr(1, sep - 1));
return { argument_type::INTERCHANGABLE, std::move(name) };
}
std::string extract_value(std::string const& raw) const override {
const std::size_t sep = raw.find_first_of("=:");
if (sep == std::string::npos || sep + 1 >= raw.size())
throw std::runtime_error("Expected a value after '=' or ':'.");
return raw.substr(sep + 1);
}
bool requires_next_token() const override { return false; }
std::string name() const override { return "Windows style options (inline values via '=' or ':')"; }
std::string short_prec() const override { return accept_dash_ ? "-" : "/"; }
std::string long_prec() const override { return "/"; }
static windows_kv_argument_convention instance;
private:
bool accept_dash_;
};
inline windows_argument_convention windows_argument_convention::instance = windows_argument_convention(bool(ALLOW_DASH_FOR_WINDOWS));
inline windows_kv_argument_convention windows_kv_argument_convention::instance = windows_kv_argument_convention(bool(ALLOW_DASH_FOR_WINDOWS));
}
namespace argument_parser::conventions {
static inline const implementations::windows_argument_convention windows_argument_convention = implementations::windows_argument_convention::instance;
static inline const implementations::windows_kv_argument_convention windows_equal_argument_convention = implementations::windows_kv_argument_convention::instance;
}
#endif // WINDOWS_ARGUMENT_CONVENTION_HPP

365
include/parser/argument_parser.hpp
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#pragma once
#include <list>
#include <optional>
#include <type_traits>
#ifndef ARGUMENT_PARSER_HPP
#define ARGUMENT_PARSER_HPP
#include <traits.hpp>
#include <base_convention.hpp>
#include <atomic>
#include <functional>
#include <initializer_list>
#include <iostream>
#include <sstream>
#include <stdexcept>
#include <string>
#include <unordered_map>
#include <utility>
#include <vector>
#include <any>
#include <ranges>
namespace argument_parser {
class action_base {
public:
virtual ~action_base() = default;
[[nodiscard]] virtual bool expects_parameter() const = 0;
virtual void invoke() const = 0;
virtual void invoke_with_parameter(const std::string& param) const = 0;
[[nodiscard]] virtual std::unique_ptr<action_base> clone() const = 0;
};
template <typename T>
class parametered_action : public action_base {
public:
explicit parametered_action(std::function<void(const T&)> const& handler) : handler(handler) {}
using parameter_type = T;
void invoke(const T& arg) const {
handler(arg);
}
[[nodiscard]] bool expects_parameter() const override { return true; }
void invoke() const override {
throw std::runtime_error("Parametered action requires a parameter");
}
void invoke_with_parameter(const std::string& param) const override {
T parsed_value = parsing_traits::parser_trait<T>::parse(param);
invoke(parsed_value);
}
[[nodiscard]] std::unique_ptr<action_base> clone() const override {
return std::make_unique<parametered_action<T>>(handler);
}
private:
std::function<void(const T&)> handler;
};
class non_parametered_action : public action_base {
public:
explicit non_parametered_action(std::function<void()> const& handler) : handler(handler) {}
void invoke() const override {
handler();
}
[[nodiscard]] bool expects_parameter() const override { return false; }
void invoke_with_parameter(const std::string& param) const override {
invoke();
}
[[nodiscard]] std::unique_ptr<action_base> clone() const override {
return std::make_unique<non_parametered_action>(handler);
}
private:
std::function<void()> handler;
};
class base_parser;
class argument {
public:
argument() : id(0), name(), action(std::make_unique<non_parametered_action>([](){})), required(false), invoked(false) {}
template <typename ActionType>
argument(const int id, std::string name, ActionType const& action)
: id(id), name(std::move(name)), action(action.clone()), required(false), invoked(false) {}
argument(const argument& other)
: id(other.id), name(other.name), action(other.action->clone()),
required(other.required), invoked(other.invoked), help_text(other.help_text) {}
argument& operator=(const argument& other) {
if (this != &other) {
id = other.id;
name = other.name;
action = other.action->clone();
required = other.required;
invoked = other.invoked;
help_text = other.help_text;
}
return *this;
}
argument(argument&& other) noexcept = default;
argument& operator=(argument&& other) noexcept = default;
[[nodiscard]] bool is_required() const { return required; }
[[nodiscard]] std::string get_name() const { return name; }
[[nodiscard]] bool is_invoked() const { return invoked; }
[[nodiscard]] bool expects_parameter() const {
return action->expects_parameter();
}
private:
void set_required(bool val) { required = val; }
void set_invoked(bool val) { invoked = val; }
void set_help_text(std::string const& text) { help_text = text; }
friend class base_parser;
int id;
std::string name;
std::unique_ptr<action_base> action;
bool required;
bool invoked;
std::string help_text;
};
namespace helpers {
template<typename T>
static parametered_action<T> make_parametered_action(std::function<void(const T&)> const& function) {
return parametered_action<T>(function);
}
static non_parametered_action make_non_parametered_action(std::function<void()> const& function) {
return non_parametered_action(function);
}
}
class base_parser {
public:
template <typename T>
void add_argument(std::string const& short_arg, std::string const& long_arg, std::string const& help_text, parametered_action<T> const& action, bool required) {
base_add_argument(short_arg, long_arg, help_text, action, required);
}
template<typename T>
void add_argument(std::string const& short_arg, std::string const& long_arg, std::string const& help_text, bool required) {
base_add_argument<T>(short_arg, long_arg, help_text, required);
}
void add_argument(std::string const& short_arg, std::string const& long_arg, std::string const& help_text, non_parametered_action const& action, bool required) {
base_add_argument(short_arg, long_arg, help_text, action, required);
}
void add_argument(std::string const& short_arg, std::string const& long_arg, std::string const& help_text, bool required) {
base_add_argument<void>(short_arg, long_arg, help_text, required);
}
void on_complete(std::function<void(base_parser const&)> const& action) {
on_complete_events.emplace_back(action);
}
template<typename T>
std::optional<T> get_optional(std::string const& arg) const {
auto id = find_argument_id(arg);
if (id.has_value()) {
auto value = stored_arguments.find(id.value());
if (value != stored_arguments.end() && value->second.has_value()) return std::any_cast<T>(value->second);
}
return std::nullopt;
}
[[nodiscard]] std::string build_help_text(std::initializer_list<conventions::convention const* const> convention_types) const {
std::stringstream ss;
ss << "Usage: " << program_name << " [OPTIONS]...\n";
for (auto const& [id, arg] : argument_map) {
auto short_arg = reverse_short_arguments.at(id);
auto long_arg = reverse_long_arguments.at(id);
ss << "\t";
ss << "-" << short_arg << ", --" << long_arg;
ss << "\t\t" << arg.help_text << "\n";
}
return ss.str();
}
argument& get_argument(conventions::parsed_argument const& arg) {
if (arg.first == conventions::argument_type::LONG) {
auto long_pos = long_arguments.find(arg.second);
if (long_pos != long_arguments.end()) return argument_map.at(long_pos->second);
} else if (arg.first == conventions::argument_type::SHORT) {
auto short_pos = short_arguments.find(arg.second);
if (short_pos != short_arguments.end()) return argument_map.at(short_pos->second);
} else if (arg.first == conventions::argument_type::INTERCHANGABLE) {
auto long_pos = long_arguments.find(arg.second);
if (long_pos != long_arguments.end()) return argument_map.at(long_pos->second);
auto short_pos = short_arguments.find(arg.second);
if (short_pos != short_arguments.end()) return argument_map.at(short_pos->second);
}
throw std::runtime_error("Unknown argument: " + arg.second);
}
[[nodiscard]] std::optional<int> find_argument_id(std::string const& arg) const {
auto long_pos = long_arguments.find(arg);
auto short_post = short_arguments.find(arg);
if (long_pos != long_arguments.end()) return long_pos->second;
if (short_post != short_arguments.end()) return short_post->second;
return std::nullopt;
}
void handle_arguments(std::initializer_list<conventions::convention const* const> convention_types) {
for (auto it = parsed_arguments.begin(); it != parsed_arguments.end(); ++it) {
std::stringstream error_stream;
bool arg_correctly_handled = false;
for (auto const& convention_type : convention_types) {
auto extracted = convention_type->get_argument(*it);
if (extracted.first == conventions::argument_type::ERROR) {
error_stream << "Convention \"" << convention_type->name() << "\" failed with: " << extracted.second << "\n";
continue;
}
try {
argument& corresponding_argument = get_argument(extracted);
if (corresponding_argument.expects_parameter()) {
if (convention_type->requires_next_token() && (it + 1) == parsed_arguments.end()) {
throw std::runtime_error("expected value for argument " + extracted.second);
}
auto value_raw = convention_type->requires_next_token() ? *(++it) : convention_type->extract_value(*it);
corresponding_argument.action->invoke_with_parameter(value_raw);
} else {
corresponding_argument.action->invoke();
}
corresponding_argument.set_invoked(true);
arg_correctly_handled = true;
break; // Convention succeeded, move to the next argument token
} catch (const std::runtime_error& e) {
error_stream << "Convention \"" << convention_type->name() << "\" failed with: " << e.what() << "\n";
}
}
if (!arg_correctly_handled) {
throw std::runtime_error("All trials for argument: \n\t\"" + *it + "\"\n failed with: \n" + error_stream.str());
}
}
check_for_required_arguments(convention_types);
fire_on_complete_events();
}
void display_help(std::initializer_list<conventions::convention const* const> convention_types) const {
std::cout << build_help_text(convention_types);
}
protected:
base_parser() = default;
std::string program_name;
std::vector<std::string> parsed_arguments;
private:
void assert_argument_not_exist(std::string const& short_arg, std::string const& long_arg) const {
if (short_arguments.contains(short_arg) || long_arguments.contains(long_arg)) {
throw std::runtime_error("The key already exists!");
}
}
static void set_argument_status(bool is_required, std::string const& help_text, argument& arg) {
arg.set_required(is_required);
arg.set_help_text(help_text);
}
void place_argument(int id, argument const& arg, std::string const& short_arg, std::string const& long_arg) {
argument_map[id] = arg;
short_arguments[short_arg] = id;
reverse_short_arguments[id] = short_arg;
long_arguments[long_arg] = id;
reverse_long_arguments[id] = long_arg;
}
template <typename ActionType>
void base_add_argument(std::string const& short_arg, std::string const& long_arg, std::string const& help_text, ActionType const& action, bool required) {
assert_argument_not_exist(short_arg, long_arg);
int id = id_counter.fetch_add(1);
argument arg(id, short_arg + "|" + long_arg, action);
set_argument_status(required, help_text, arg);
place_argument(id, arg, short_arg, long_arg);
}
template<typename StoreType = void>
void base_add_argument(std::string const& short_arg, std::string const& long_arg, std::string const& help_text, bool required) {
assert_argument_not_exist(short_arg, long_arg);
int id = id_counter.fetch_add(1);
if constexpr (std::is_same_v<StoreType, void>) {
auto action = helpers::make_non_parametered_action([id, this] { stored_arguments[id] = std::any{ true }; });
argument arg(id, short_arg + "|" + long_arg, action);
set_argument_status(required, help_text, arg);
place_argument(id, arg, short_arg, long_arg);
} else {
auto action = helpers::make_parametered_action<StoreType>([id, this](StoreType const& value) { stored_arguments[id] = std::any{ value }; });
argument arg(id, short_arg + "|" + long_arg, action);
set_argument_status(required, help_text, arg);
place_argument(id, arg, short_arg, long_arg);
}
}
void check_for_required_arguments(std::initializer_list<conventions::convention const* const> convention_types) {
std::vector<std::pair<std::string, std::string>> required_args;
for (const auto &arg: argument_map | std::views::values) {
if (arg.is_required() and not arg.is_invoked()) {
required_args.emplace_back<std::pair<std::string, std::string>>({
reverse_short_arguments[arg.id],
reverse_long_arguments[arg.id]
});
}
}
if (not required_args.empty()) {
std::cerr << "These arguments were expected but not provided: ";
for (auto const& [s, l] : required_args) {
std::cerr << "[-" << s << ", --" << l << "] ";
}
std::cerr << "\n";
display_help(convention_types);
}
}
void fire_on_complete_events() const {
for(auto const& event : on_complete_events) {
event(*this);
}
}
inline static std::atomic_int id_counter = 0;
std::unordered_map<int, std::any> stored_arguments;
std::unordered_map<int, argument> argument_map;
std::unordered_map<std::string, int> short_arguments;
std::unordered_map<int, std::string> reverse_short_arguments;
std::unordered_map<std::string, int> long_arguments;
std::unordered_map<int, std::string> reverse_long_arguments;
std::list<std::function<void(base_parser const&)>> on_complete_events;
friend class linux_parser;
friend class windows_parser;
friend class macos_parser;
friend class fake_parser;
};
}
#endif // ARGUMENT_PARSER_HPP

38
include/parser/fake_parser.hpp
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@@ -1,38 +0,0 @@
#pragma once
#ifndef FAKE_PARSER_HPP
#define FAKE_PARSER_HPP
#include <argument_parser.hpp>
#include <initializer_list>
#include <string>
namespace argument_parser {
class fake_parser : public base_parser {
public:
fake_parser() = default;
fake_parser(std::string program_name, std::vector<std::string> const& arguments) {
this->program_name = std::move(program_name);
parsed_arguments = arguments;
}
fake_parser(std::string const& program_name, std::vector<std::string>&& arguments) {
this->program_name = program_name;
parsed_arguments = std::move(arguments);
}
fake_parser(std::string const& program_name, std::initializer_list<std::string> const& arguments) :
fake_parser(program_name, std::vector<std::string>(arguments)) {}
void set_program_name(std::string const& program_name) {
this->program_name = program_name;
}
void set_parsed_arguments(std::vector<std::string> const& parsed_arguments) {
this->parsed_arguments = parsed_arguments;
}
};
}
#endif

249
include/parser/parser_v2.hpp
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@@ -1,249 +0,0 @@
#pragma once
#include <argument_parser.hpp>
#include <cstdlib>
#include <exception>
#include <fake_parser.hpp>
#include <initializer_list>
#include <iostream>
#include <memory>
#include <optional>
#include <stdexcept>
#include <string>
#include <string_view>
#include <unordered_map>
#include <variant>
#include <vector>
namespace argument_parser::v2 {
namespace internal {
static inline fake_parser fake_parser{};
}
enum class add_argument_flags {
ShortArgument,
LongArgument,
HelpText,
Action,
Required
};
namespace flags {
constexpr static inline add_argument_flags ShortArgument = add_argument_flags::ShortArgument;
constexpr static inline add_argument_flags LongArgument = add_argument_flags::LongArgument;
constexpr static inline add_argument_flags HelpText = add_argument_flags::HelpText;
constexpr static inline add_argument_flags Action = add_argument_flags::Action;
constexpr static inline add_argument_flags Required = add_argument_flags::Required;
}
class base_parser : private argument_parser::base_parser {
public:
template<typename T>
using typed_flag_value = std::variant<std::string, parametered_action<T>, bool>;
using non_typed_flag_value = std::variant<std::string, non_parametered_action, bool>;
template<typename T>
using typed_argument_pair = std::pair<add_argument_flags, typed_flag_value<T>>;
using non_typed_argument_pair = std::pair<add_argument_flags, non_typed_flag_value>;
template<typename T>
void add_argument(std::unordered_map<add_argument_flags, typed_flag_value<T>> const& argument_pairs) {
std::unordered_map<extended_add_argument_flags, bool> found_params {{
extended_add_argument_flags::IsTyped, true
}};
std::string short_arg, long_arg, help_text;
std::unique_ptr<action_base> action;
bool required = false;
if (argument_pairs.contains(add_argument_flags::ShortArgument)) {
found_params[extended_add_argument_flags::ShortArgument] = true;
short_arg = get_or_throw<std::string>(argument_pairs.at(add_argument_flags::ShortArgument), "short");
}
if (argument_pairs.contains(add_argument_flags::LongArgument)) {
found_params[extended_add_argument_flags::LongArgument] = true;
long_arg = get_or_throw<std::string>(argument_pairs.at(add_argument_flags::LongArgument), "long");
if (short_arg.empty()) short_arg = long_arg;
} else {
if (!short_arg.empty()) long_arg = short_arg;
}
if (argument_pairs.contains(add_argument_flags::Action)) {
found_params[extended_add_argument_flags::Action] = true;
action = get_or_throw<parametered_action<T>>(argument_pairs.at(add_argument_flags::Action), "action").clone();
}
if (argument_pairs.contains(add_argument_flags::HelpText)) {
help_text = get_or_throw<std::string>(argument_pairs.at(add_argument_flags::HelpText), "help");
} else {
help_text = short_arg + ", " + long_arg;
}
if (argument_pairs.contains(add_argument_flags::Required) && get_or_throw<bool>(argument_pairs.at(add_argument_flags::Required), "required")) {
required = true;
}
auto suggested_add = suggest_candidate(found_params);
if (suggested_add == candidate_type::unknown) {
throw std::runtime_error("Could not match any add argument overload to given parameters. Are you missing some required parameter?");
}
switch (suggested_add) {
case candidate_type::typed_action:
base::add_argument(short_arg, long_arg, help_text, *static_cast<parametered_action<T>*>(&(*action)), required);
break;
case candidate_type::store_other:
base::add_argument(short_arg, long_arg, help_text, required);
break;
default:
throw std::runtime_error("Could not match the arguments against any overload.");
}
}
template<typename T>
void add_argument(std::initializer_list<typed_argument_pair<T>> const& pairs) {
std::unordered_map<add_argument_flags, typed_flag_value<T>> args;
for (auto& [k, v]: pairs) {
args[k] = v;
}
add_argument<T>(args);
}
void add_argument(std::initializer_list<non_typed_argument_pair> const& pairs) {
std::unordered_map<add_argument_flags, non_typed_flag_value> args;
for (auto& [k, v] : pairs) {
args[k] = v;
}
add_argument(args);
}
void add_argument(std::unordered_map<add_argument_flags, non_typed_flag_value> const& argument_pairs) {
std::unordered_map<extended_add_argument_flags, bool> found_params {{
extended_add_argument_flags::IsTyped, false
}};
std::string short_arg, long_arg, help_text;
std::unique_ptr<action_base> action;
bool required = false;
if (argument_pairs.contains(add_argument_flags::ShortArgument)) {
found_params[extended_add_argument_flags::ShortArgument] = true;
short_arg = get_or_throw<std::string>(argument_pairs.at(add_argument_flags::ShortArgument), "short");
}
if (argument_pairs.contains(add_argument_flags::LongArgument)) {
found_params[extended_add_argument_flags::LongArgument] = true;
long_arg = get_or_throw<std::string>(argument_pairs.at(add_argument_flags::LongArgument), "long");
if (short_arg.empty()) short_arg = long_arg;
} else {
if (!short_arg.empty()) long_arg = short_arg;
}
if (argument_pairs.contains(add_argument_flags::Action)) {
found_params[extended_add_argument_flags::Action] = true;
action = get_or_throw<non_parametered_action>(argument_pairs.at(add_argument_flags::Action), "action").clone();
}
if (argument_pairs.contains(add_argument_flags::HelpText)) {
help_text = get_or_throw<std::string>(argument_pairs.at(add_argument_flags::HelpText), "help");
} else {
help_text = short_arg + ", " + long_arg;
}
if (argument_pairs.contains(add_argument_flags::Required) && get_or_throw<bool>(argument_pairs.at(add_argument_flags::Required), "required")) {
required = true;
}
auto suggested_add = suggest_candidate(found_params);
if (suggested_add == candidate_type::unknown) {
throw std::runtime_error("Could not match any add argument overload to given parameters. Are you missing some required parameter?");
}
switch (suggested_add) {
case candidate_type::non_typed_action:
base::add_argument(short_arg, long_arg, help_text, *static_cast<non_parametered_action*>(&(*action)), required);
break;
case candidate_type::store_boolean:
base::add_argument(short_arg, long_arg, help_text, required);
break;
default:
throw std::runtime_error("Could not match the arguments against any overload. The suggested candidate was: " + std::to_string((int(suggested_add))));
}
}
argument_parser::base_parser& to_v1() {
return *this;
}
void handle_arguments(std::initializer_list<conventions::convention const* const> convention_types) {
base::handle_arguments(convention_types);
}
template<typename T>
std::optional<T> get_optional(std::string const& arg) {
return base::get_optional<T>(arg);
}
void on_complete(std::function<void(argument_parser::base_parser const&)> const& action) {
base::on_complete(action);
}
protected:
void set_program_name(std::string p) {
base::program_name = std::move(p);
}
std::vector<std::string>& ref_parsed_args() {
return base::parsed_arguments;
}
private:
using base = argument_parser::base_parser;
enum class extended_add_argument_flags {
ShortArgument,
LongArgument,
Action,
IsTyped
};
enum class candidate_type {
store_boolean,
store_other,
typed_action,
non_typed_action,
unknown
};
template<typename T, size_t S>
bool satisfies_at_least_one(std::array<T, S> const& arr, std::unordered_map<T, bool> const& map) {
for (const auto& req: arr) {
if (map.contains(req)) return true;
}
return false;
}
candidate_type suggest_candidate(std::unordered_map<extended_add_argument_flags, bool> const& available_vars) {
auto constexpr required_at_least_one = std::array<extended_add_argument_flags, 2> { extended_add_argument_flags::ShortArgument, extended_add_argument_flags::LongArgument };
if (!satisfies_at_least_one(required_at_least_one, available_vars)) return candidate_type::unknown;
if (available_vars.contains(extended_add_argument_flags::Action)) {
if (available_vars.at(extended_add_argument_flags::IsTyped))
return candidate_type::typed_action;
else return candidate_type::non_typed_action;
}
if (available_vars.at(extended_add_argument_flags::IsTyped)) return candidate_type::store_other;
return candidate_type::store_boolean;
}
template<typename T, typename I>
T get_or_throw(typed_flag_value<I> const& v, std::string_view key) {
if (auto p = std::get_if<T>(&v)) return *p;
throw std::invalid_argument(std::string("variant type mismatch for key: ") + std::string(key));
}
template<typename T>
T get_or_throw(non_typed_flag_value const& v, std::string_view key) {
if (auto p = std::get_if<T>(&v)) return *p;
throw std::invalid_argument(std::string("variant type mismatch for key: ") + std::string(key));
}
};
}

53
include/parser/parsing_traits/traits.hpp
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@@ -1,53 +0,0 @@
#pragma once
#ifndef PARSING_TRAITS_HPP
#define PARSING_TRAITS_HPP
#include <string>
#include <stdexcept>
namespace argument_parser::parsing_traits {
template <typename T_>
struct parser_trait {
using type = T_;
static T_ parse(const std::string& input);
};
template <>
struct parser_trait<std::string> {
static std::string parse(const std::string& input) {
return input;
}
};
template<>
struct parser_trait<bool> {
static bool parse(const std::string& input) {
if (input == "t" || input == "true" || input == "1") return true;
if (input == "f" || input == "false" || input == "0") return false;
throw std::runtime_error("Invalid boolean value: " + input);
}
};
template <>
struct parser_trait<int> {
static int parse(const std::string& input) {
return std::stoi(input);
}
};
template <>
struct parser_trait<float> {
static float parse(const std::string& input) {
return std::stof(input);
}
};
template <>
struct parser_trait<double> {
static double parse(const std::string& input) {
return std::stod(input);
}
};
}
#endif

25
include/parser/platform_headers/linux_parser.hpp
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@@ -1,25 +0,0 @@
#pragma once
#ifdef __linux__
#ifndef LINUX_PARSER_HPP
#define LINUX_PARSER_HPP
#include <fstream>
#include <string>
#include <argument_parser.hpp>
namespace argument_parser {
class linux_parser : public base_parser {
public:
linux_parser() {
std::ifstream command_line_file{"/proc/self/cmdline"};
std::getline(command_line_file, program_name, '\0');
for(std::string line; std::getline(command_line_file, line, '\0');) {
parsed_arguments.emplace_back(line);
}
}
};
}
#endif
#endif

42
include/parser/platform_headers/macos_parser.hpp
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@@ -1,42 +0,0 @@
#pragma once
#ifdef __APPLE__
#ifndef MACOS_PARSER_HPP
#define MACOS_PARSER_HPP
#include <argument_parser.hpp>
#include <crt_externs.h>
#include <parser_v2.hpp>
#include <string>
namespace argument_parser {
class macos_parser : public base_parser {
public:
macos_parser() {
const int argc = *_NSGetArgc();
if (char **argv = *_NSGetArgv(); argc > 0 && argv != nullptr && argv[0] != nullptr) {
program_name = (argv[0]);
for (int i = 1; i < argc; ++i) {
if (argv[i] != nullptr) parsed_arguments.emplace_back(argv[i]);
}
}
}
};
namespace v2 {
class macos_parser : public v2::base_parser {
public:
macos_parser() {
const int argc = *_NSGetArgc();
if (char **argv = *_NSGetArgv(); argc > 0 && argv != nullptr && argv[0] != nullptr) {
set_program_name(argv[0]);
for (int i = 1; i < argc; ++i) {
if (argv[i] != nullptr) ref_parsed_args().emplace_back(argv[i]);
}
}
}
};
}
}
#endif
#endif

61
include/parser/platform_headers/windows_parser.hpp
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@@ -1,61 +0,0 @@
#pragma once
#ifdef _WIN32
#include <argument_parser.hpp>
#include <memory>
#include <string>
#include <windows.h>
#include <shellapi.h>
namespace argument_parser {
class windows_parser : public base_parser {
public:
windows_parser() {
int nArgs = 0;
LPWSTR* raw = ::CommandLineToArgvW(::GetCommandLineW(), &nArgs);
if (!raw) {
throw std::runtime_error("CommandLineToArgvW failed (" +
std::to_string(::GetLastError()) + ")");
}
std::unique_ptr<LPWSTR, void(*)(LPWSTR*)> argvW{ raw, [](LPWSTR* p){ if (p) ::LocalFree(p); } };
if (nArgs <= 0) {
throw std::runtime_error("No command line arguments found.");
}
{
std::wstring w0 = argvW.get()[0];
auto pos = w0.find_last_of(L"\\/");
std::wstring base = (pos == std::wstring::npos) ? w0 : w0.substr(pos + 1);
program_name = utf8_from_wstring(base);
}
parsed_arguments.reserve(static_cast<size_t>(nArgs > 0 ? nArgs - 1 : 0));
for (int i = 1; i < nArgs; ++i) {
parsed_arguments.emplace_back(utf8_from_wstring(argvW.get()[i]));
}
}
private:
static std::string utf8_from_wstring(const std::wstring& w) {
if (w.empty()) return {};
int needed = ::WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS,
w.c_str(), -1, nullptr, 0, nullptr, nullptr);
if (needed <= 0) {
throw std::runtime_error("WideCharToMultiByte sizing failed (" +
std::to_string(::GetLastError()) + ")");
}
std::string out;
out.resize(static_cast<size_t>(needed - 1));
int written = ::WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS,
w.c_str(), -1, out.data(), needed - 1, nullptr, nullptr);
if (written <= 0) {
throw std::runtime_error("WideCharToMultiByte convert failed (" +
std::to_string(::GetLastError()) + ")");
}
return out;
}
};
}
#endif

18
include/argparse → src/headers/argparse
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@@ -6,17 +6,29 @@
#ifdef __linux__ #ifdef __linux__
#include <linux_parser.hpp> #include <linux_parser.hpp>
namespace argument_parser { namespace argument_parser {
using parser = linux_parser; using parser = linux_parser;
}
namespace argument_parser::v2 {
using parser = linux_parser;
} }
#elif __APPLE__ #elif __APPLE__
#include <macos_parser.hpp> #include <macos_parser.hpp>
namespace argument_parser { namespace argument_parser {
using parser = macos_parser; using parser = macos_parser;
}
namespace argument_parser::v2 {
using parser = macos_parser;
} }
#elif _WIN32 #elif _WIN32
#include <windows_parser.hpp> #include <windows_parser.hpp>
namespace argument_parser { namespace argument_parser {
using parser = windows_parser; using parser = windows_parser;
}
namespace argument_parser::v2 {
using parser = windows_parser;
} }
#else #else
#error "Unsupported platform" #error "Unsupported platform"

34
src/headers/conventions/base_convention.hpp Normal file
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@@ -0,0 +1,34 @@
#pragma once
#include <string>
#include <utility>
#ifndef BASE_CONVENTION_HPP
#define BASE_CONVENTION_HPP
namespace argument_parser::conventions {
enum class argument_type { SHORT, LONG, POSITIONAL, INTERCHANGABLE, ERROR };
using parsed_argument = std::pair<argument_type, std::string>;
class base_convention {
public:
virtual std::string extract_value(std::string const &) const = 0;
virtual parsed_argument get_argument(std::string const &) const = 0;
virtual bool requires_next_token() const = 0;
virtual std::string name() const = 0;
virtual std::string short_prec() const = 0;
virtual std::string long_prec() const = 0;
protected:
base_convention() = default;
~base_convention() = default;
};
using convention = base_convention;
} // namespace argument_parser::conventions
namespace argument_parser::conventions::helpers {
std::string to_lower(std::string s);
std::string to_upper(std::string s);
} // namespace argument_parser::conventions::helpers
#endif

48
src/headers/conventions/implementations/gnu_argument_convention.hpp Normal file
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#pragma once
#include "base_convention.hpp"
#ifndef GNU_ARGUMENT_CONVENTION_HPP
#define GNU_ARGUMENT_CONVENTION_HPP
namespace argument_parser::conventions::implementations {
class gnu_argument_convention : public base_convention {
public:
parsed_argument get_argument(std::string const &raw) const override;
std::string extract_value(std::string const & /*raw*/) const override;
bool requires_next_token() const override;
std::string name() const override;
std::string short_prec() const override;
std::string long_prec() const override;
static gnu_argument_convention instance;
private:
gnu_argument_convention() = default;
};
class gnu_equal_argument_convention : public base_convention {
public:
parsed_argument get_argument(std::string const &raw) const override;
std::string extract_value(std::string const &raw) const override;
bool requires_next_token() const override;
std::string name() const override;
std::string short_prec() const override;
std::string long_prec() const override;
static gnu_equal_argument_convention instance;
private:
gnu_equal_argument_convention() = default;
};
inline gnu_argument_convention gnu_argument_convention::instance{};
inline gnu_equal_argument_convention gnu_equal_argument_convention::instance{};
} // namespace argument_parser::conventions::implementations
namespace argument_parser::conventions {
static const implementations::gnu_argument_convention gnu_argument_convention =
implementations::gnu_argument_convention::instance;
static const implementations::gnu_equal_argument_convention gnu_equal_argument_convention =
implementations::gnu_equal_argument_convention::instance;
} // namespace argument_parser::conventions
#endif

55
src/headers/conventions/implementations/windows_argument_convention.hpp Normal file
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@@ -0,0 +1,55 @@
#pragma once
#include "base_convention.hpp"
#ifndef WINDOWS_ARGUMENT_CONVENTION_HPP
#define WINDOWS_ARGUMENT_CONVENTION_HPP
#ifndef ALLOW_DASH_FOR_WINDOWS
#define ALLOW_DASH_FOR_WINDOWS 1
#endif
namespace argument_parser::conventions::implementations {
class windows_argument_convention : public base_convention {
public:
explicit windows_argument_convention(bool accept_dash = true);
parsed_argument get_argument(std::string const &raw) const override;
std::string extract_value(std::string const & /*raw*/) const override;
bool requires_next_token() const override;
std::string name() const override;
std::string short_prec() const override;
std::string long_prec() const override;
static windows_argument_convention instance;
private:
bool accept_dash_;
};
class windows_kv_argument_convention : public base_convention {
public:
explicit windows_kv_argument_convention(bool accept_dash = true);
parsed_argument get_argument(std::string const &raw) const override;
std::string extract_value(std::string const &raw) const override;
bool requires_next_token() const override;
std::string name() const override;
std::string short_prec() const override;
std::string long_prec() const override;
static windows_kv_argument_convention instance;
private:
bool accept_dash_;
};
inline windows_argument_convention windows_argument_convention::instance =
windows_argument_convention(bool(ALLOW_DASH_FOR_WINDOWS));
inline windows_kv_argument_convention windows_kv_argument_convention::instance =
windows_kv_argument_convention(bool(ALLOW_DASH_FOR_WINDOWS));
} // namespace argument_parser::conventions::implementations
namespace argument_parser::conventions {
static inline const implementations::windows_argument_convention windows_argument_convention =
implementations::windows_argument_convention::instance;
static inline const implementations::windows_kv_argument_convention windows_equal_argument_convention =
implementations::windows_kv_argument_convention::instance;
} // namespace argument_parser::conventions
#endif // WINDOWS_ARGUMENT_CONVENTION_HPP

236
src/headers/parser/argument_parser.hpp Normal file
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#pragma once
#include <list>
#include <optional>
#include <type_traits>
#ifndef ARGUMENT_PARSER_HPP
#define ARGUMENT_PARSER_HPP
#include <any>
#include <atomic>
#include <base_convention.hpp>
#include <functional>
#include <initializer_list>
#include <memory>
#include <stdexcept>
#include <string>
#include <traits.hpp>
#include <unordered_map>
#include <utility>
#include <vector>
namespace argument_parser {
class action_base {
public:
virtual ~action_base() = default;
[[nodiscard]] virtual bool expects_parameter() const = 0;
virtual void invoke() const = 0;
virtual void invoke_with_parameter(const std::string &param) const = 0;
[[nodiscard]] virtual std::unique_ptr<action_base> clone() const = 0;
};
template <typename T> class parametered_action : public action_base {
public:
explicit parametered_action(std::function<void(const T &)> const &handler) : handler(handler) {}
using parameter_type = T;
void invoke(const T &arg) const {
handler(arg);
}
[[nodiscard]] bool expects_parameter() const override {
return true;
}
void invoke() const override {
throw std::runtime_error("Parametered action requires a parameter");
}
void invoke_with_parameter(const std::string &param) const override {
T parsed_value = parsing_traits::parser_trait<T>::parse(param);
invoke(parsed_value);
}
[[nodiscard]] std::unique_ptr<action_base> clone() const override {
return std::make_unique<parametered_action<T>>(handler);
}
private:
std::function<void(const T &)> handler;
};
class non_parametered_action : public action_base {
public:
explicit non_parametered_action(std::function<void()> const &handler) : handler(handler) {}
void invoke() const override {
handler();
}
[[nodiscard]] bool expects_parameter() const override {
return false;
}
void invoke_with_parameter(const std::string &param) const override {
invoke();
}
[[nodiscard]] std::unique_ptr<action_base> clone() const override {
return std::make_unique<non_parametered_action>(handler);
}
private:
std::function<void()> handler;
};
class base_parser;
class argument {
public:
argument();
template <typename ActionType>
argument(const int id, std::string name, ActionType const &action)
: id(id), name(std::move(name)), action(action.clone()), required(false), invoked(false) {}
argument(const argument &other);
argument &operator=(const argument &other);
argument(argument &&other) noexcept = default;
argument &operator=(argument &&other) noexcept = default;
[[nodiscard]] bool is_required() const;
[[nodiscard]] std::string get_name() const;
[[nodiscard]] bool is_invoked() const;
[[nodiscard]] bool expects_parameter() const;
[[nodiscard]] std::string get_help_text() const;
private:
void set_required(bool val);
void set_invoked(bool val);
void set_help_text(std::string const &text);
friend class base_parser;
int id;
std::string name;
std::unique_ptr<action_base> action;
bool required;
bool invoked;
std::string help_text;
};
namespace helpers {
template <typename T>
static parametered_action<T> make_parametered_action(std::function<void(const T &)> const &function) {
return parametered_action<T>(function);
}
static non_parametered_action make_non_parametered_action(std::function<void()> const &function) {
return non_parametered_action(function);
}
} // namespace helpers
class base_parser {
public:
template <typename T>
void add_argument(std::string const &short_arg, std::string const &long_arg, std::string const &help_text,
parametered_action<T> const &action, bool required) {
base_add_argument(short_arg, long_arg, help_text, action, required);
}
template <typename T>
void add_argument(std::string const &short_arg, std::string const &long_arg, std::string const &help_text,
bool required) {
base_add_argument<T>(short_arg, long_arg, help_text, required);
}
void add_argument(std::string const &short_arg, std::string const &long_arg, std::string const &help_text,
non_parametered_action const &action, bool required) {
base_add_argument(short_arg, long_arg, help_text, action, required);
}
void add_argument(std::string const &short_arg, std::string const &long_arg, std::string const &help_text,
bool required) {
base_add_argument<void>(short_arg, long_arg, help_text, required);
}
void on_complete(std::function<void(base_parser const &)> const &action);
template <typename T> std::optional<T> get_optional(std::string const &arg) const {
auto id = find_argument_id(arg);
if (id.has_value()) {
auto value = stored_arguments.find(id.value());
if (value != stored_arguments.end() && value->second.has_value()) {
return std::any_cast<T>(value->second);
}
}
return std::nullopt;
}
[[nodiscard]] std::string
build_help_text(std::initializer_list<conventions::convention const *const> convention_types) const;
argument &get_argument(conventions::parsed_argument const &arg);
[[nodiscard]] std::optional<int> find_argument_id(std::string const &arg) const;
void handle_arguments(std::initializer_list<conventions::convention const *const> convention_types);
void display_help(std::initializer_list<conventions::convention const *const> convention_types) const;
protected:
base_parser() = default;
std::string program_name;
std::vector<std::string> parsed_arguments;
private:
void assert_argument_not_exist(std::string const &short_arg, std::string const &long_arg) const;
static void set_argument_status(bool is_required, std::string const &help_text, argument &arg);
void place_argument(int id, argument const &arg, std::string const &short_arg, std::string const &long_arg);
template <typename ActionType>
void base_add_argument(std::string const &short_arg, std::string const &long_arg, std::string const &help_text,
ActionType const &action, bool required) {
assert_argument_not_exist(short_arg, long_arg);
int id = id_counter.fetch_add(1);
argument arg(id, short_arg + "|" + long_arg, action);
set_argument_status(required, help_text, arg);
place_argument(id, arg, short_arg, long_arg);
}
template <typename StoreType = void>
void base_add_argument(std::string const &short_arg, std::string const &long_arg, std::string const &help_text,
bool required) {
assert_argument_not_exist(short_arg, long_arg);
int id = id_counter.fetch_add(1);
if constexpr (std::is_same_v<StoreType, void>) {
auto action =
helpers::make_non_parametered_action([id, this] { stored_arguments[id] = std::any{true}; });
argument arg(id, short_arg + "|" + long_arg, action);
set_argument_status(required, help_text, arg);
place_argument(id, arg, short_arg, long_arg);
} else {
auto action = helpers::make_parametered_action<StoreType>(
[id, this](StoreType const &value) { stored_arguments[id] = std::any{value}; });
argument arg(id, short_arg + "|" + long_arg, action);
set_argument_status(required, help_text, arg);
place_argument(id, arg, short_arg, long_arg);
}
}
void check_for_required_arguments(std::initializer_list<conventions::convention const *const> convention_types);
void fire_on_complete_events() const;
inline static std::atomic_int id_counter = 0;
std::unordered_map<int, std::any> stored_arguments;
std::unordered_map<int, argument> argument_map;
std::unordered_map<std::string, int> short_arguments;
std::unordered_map<int, std::string> reverse_short_arguments;
std::unordered_map<std::string, int> long_arguments;
std::unordered_map<int, std::string> reverse_long_arguments;
std::list<std::function<void(base_parser const &)>> on_complete_events;
friend class linux_parser;
friend class windows_parser;
friend class macos_parser;
friend class fake_parser;
};
} // namespace argument_parser
#endif // ARGUMENT_PARSER_HPP

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#pragma once
#ifndef FAKE_PARSER_HPP
#define FAKE_PARSER_HPP
#include <argument_parser.hpp>
#include <initializer_list>
#include <string>
namespace argument_parser {
class fake_parser : public base_parser {
public:
fake_parser() = default;
fake_parser(std::string program_name, std::vector<std::string> const &arguments);
fake_parser(std::string const &program_name, std::vector<std::string> &&arguments);
fake_parser(std::string const &program_name, std::initializer_list<std::string> const &arguments);
void set_program_name(std::string const &program_name);
void set_parsed_arguments(std::vector<std::string> const &parsed_arguments);
};
} // namespace argument_parser
#endif

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#pragma once
#include <argument_parser.hpp>
#include <array>
#include <cstdlib>
#include <fake_parser.hpp>
#include <initializer_list>
#include <memory>
#include <optional>
#include <stdexcept>
#include <string>
#include <string_view>
#include <unordered_map>
#include <variant>
#include <vector>
namespace argument_parser::v2 {
namespace internal {
static inline fake_parser fake_parser{};
}
enum class add_argument_flags { ShortArgument, LongArgument, HelpText, Action, Required };
namespace flags {
constexpr static inline add_argument_flags ShortArgument = add_argument_flags::ShortArgument;
constexpr static inline add_argument_flags LongArgument = add_argument_flags::LongArgument;
constexpr static inline add_argument_flags HelpText = add_argument_flags::HelpText;
constexpr static inline add_argument_flags Action = add_argument_flags::Action;
constexpr static inline add_argument_flags Required = add_argument_flags::Required;
} // namespace flags
class base_parser : private argument_parser::base_parser {
public:
template <typename T> using typed_flag_value = std::variant<std::string, parametered_action<T>, bool>;
using non_typed_flag_value = std::variant<std::string, non_parametered_action, bool>;
template <typename T> using typed_argument_pair = std::pair<add_argument_flags, typed_flag_value<T>>;
using non_typed_argument_pair = std::pair<add_argument_flags, non_typed_flag_value>;
template <typename T>
void add_argument(std::unordered_map<add_argument_flags, typed_flag_value<T>> const &argument_pairs) {
add_argument_impl<true, parametered_action<T>, T>(argument_pairs);
}
template <typename T> void add_argument(std::initializer_list<typed_argument_pair<T>> const &pairs) {
std::unordered_map<add_argument_flags, typed_flag_value<T>> args;
for (auto &[k, v] : pairs) {
args[k] = v;
}
add_argument<T>(args);
}
void add_argument(std::initializer_list<non_typed_argument_pair> const &pairs) {
std::unordered_map<add_argument_flags, non_typed_flag_value> args;
for (auto &[k, v] : pairs) {
args[k] = v;
}
add_argument(args);
}
void add_argument(std::unordered_map<add_argument_flags, non_typed_flag_value> const &argument_pairs) {
add_argument_impl<false, non_parametered_action, void>(argument_pairs);
}
argument_parser::base_parser &to_v1() {
return *this;
}
void handle_arguments(std::initializer_list<conventions::convention const *const> convention_types) {
base::handle_arguments(convention_types);
}
template <typename T> std::optional<T> get_optional(std::string const &arg) {
return base::get_optional<T>(arg);
}
void on_complete(std::function<void(argument_parser::base_parser const &)> const &action) {
base::on_complete(action);
}
protected:
void set_program_name(std::string p) {
base::program_name = std::move(p);
}
std::vector<std::string> &ref_parsed_args() {
return base::parsed_arguments;
}
private:
template <bool IsTyped, typename ActionType, typename T, typename ArgsMap>
void add_argument_impl(ArgsMap const &argument_pairs) {
std::unordered_map<extended_add_argument_flags, bool> found_params{
{extended_add_argument_flags::IsTyped, IsTyped}};
std::string short_arg, long_arg, help_text;
std::unique_ptr<action_base> action;
bool required = false;
if (argument_pairs.find(add_argument_flags::ShortArgument) != argument_pairs.end()) {
found_params[extended_add_argument_flags::ShortArgument] = true;
short_arg = get_or_throw<std::string>(argument_pairs.at(add_argument_flags::ShortArgument), "short");
}
if (argument_pairs.find(add_argument_flags::LongArgument) != argument_pairs.end()) {
found_params[extended_add_argument_flags::LongArgument] = true;
long_arg = get_or_throw<std::string>(argument_pairs.at(add_argument_flags::LongArgument), "long");
if (short_arg.empty())
short_arg = long_arg;
} else {
if (!short_arg.empty())
long_arg = short_arg;
}
if (argument_pairs.find(add_argument_flags::Action) != argument_pairs.end()) {
found_params[extended_add_argument_flags::Action] = true;
action = get_or_throw<ActionType>(argument_pairs.at(add_argument_flags::Action), "action").clone();
}
if (argument_pairs.find(add_argument_flags::HelpText) != argument_pairs.end()) {
help_text = get_or_throw<std::string>(argument_pairs.at(add_argument_flags::HelpText), "help");
} else {
help_text = short_arg + ", " + long_arg;
}
if (argument_pairs.find(add_argument_flags::Required) != argument_pairs.end() &&
get_or_throw<bool>(argument_pairs.at(add_argument_flags::Required), "required")) {
required = true;
}
auto suggested_add = suggest_candidate(found_params);
if (suggested_add == candidate_type::unknown) {
throw std::runtime_error("Could not match any add argument overload to given parameters. Are you "
"missing some required parameter?");
}
if constexpr (IsTyped) {
switch (suggested_add) {
case candidate_type::typed_action:
base::add_argument(short_arg, long_arg, help_text, *static_cast<ActionType *>(&(*action)),
required);
break;
case candidate_type::store_other:
base::add_argument<T>(short_arg, long_arg, help_text, required);
break;
default:
throw std::runtime_error("Could not match the arguments against any overload.");
}
} else {
switch (suggested_add) {
case candidate_type::non_typed_action:
base::add_argument(short_arg, long_arg, help_text, *static_cast<ActionType *>(&(*action)),
required);
break;
case candidate_type::store_boolean:
base::add_argument(short_arg, long_arg, help_text, required);
break;
default:
throw std::runtime_error(
"Could not match the arguments against any overload. The suggested candidate was: " +
std::to_string((int(suggested_add))));
}
}
}
using base = argument_parser::base_parser;
enum class extended_add_argument_flags { ShortArgument, LongArgument, Action, IsTyped };
enum class candidate_type { store_boolean, store_other, typed_action, non_typed_action, unknown };
template <typename T, size_t S>
bool satisfies_at_least_one(std::array<T, S> const &arr, std::unordered_map<T, bool> const &map) {
for (const auto &req : arr) {
if (map.find(req) != map.end())
return true;
}
return false;
}
candidate_type suggest_candidate(std::unordered_map<extended_add_argument_flags, bool> const &available_vars) {
auto constexpr required_at_least_one = std::array<extended_add_argument_flags, 2>{
extended_add_argument_flags::ShortArgument, extended_add_argument_flags::LongArgument};
if (!satisfies_at_least_one(required_at_least_one, available_vars))
return candidate_type::unknown;
if (available_vars.find(extended_add_argument_flags::Action) != available_vars.end()) {
if (available_vars.at(extended_add_argument_flags::IsTyped))
return candidate_type::typed_action;
else
return candidate_type::non_typed_action;
}
if (available_vars.at(extended_add_argument_flags::IsTyped))
return candidate_type::store_other;
return candidate_type::store_boolean;
}
template <typename T, typename I> T get_or_throw(typed_flag_value<I> const &v, std::string_view key) {
if (auto p = std::get_if<T>(&v))
return *p;
throw std::invalid_argument(std::string("variant type mismatch for key: ") + std::string(key));
}
template <typename T> T get_or_throw(non_typed_flag_value const &v, std::string_view key) {
if (auto p = std::get_if<T>(&v))
return *p;
throw std::invalid_argument(std::string("variant type mismatch for key: ") + std::string(key));
}
};
} // namespace argument_parser::v2

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#pragma once
#ifndef PARSING_TRAITS_HPP
#define PARSING_TRAITS_HPP
#include <string>
namespace argument_parser::parsing_traits {
template <typename T_> struct parser_trait {
using type = T_;
static T_ parse(const std::string &input);
};
template <> struct parser_trait<std::string> {
static std::string parse(const std::string &input);
};
template <> struct parser_trait<bool> {
static bool parse(const std::string &input);
};
template <> struct parser_trait<int> {
static int parse(const std::string &input);
};
template <> struct parser_trait<float> {
static float parse(const std::string &input);
};
template <> struct parser_trait<double> {
static double parse(const std::string &input);
};
} // namespace argument_parser::parsing_traits
#endif

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#pragma once
#ifdef __linux__
#ifndef LINUX_PARSER_HPP
#define LINUX_PARSER_HPP
#include <argument_parser.hpp>
#include <parser_v2.hpp>
namespace argument_parser {
class linux_parser : public base_parser {
public:
linux_parser();
};
namespace v2 {
class linux_parser : public v2::base_parser {
public:
linux_parser();
};
} // namespace v2
} // namespace argument_parser
#endif
#endif

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#pragma once
#ifdef __APPLE__
#ifndef MACOS_PARSER_HPP
#define MACOS_PARSER_HPP
#include <argument_parser.hpp>
#include <crt_externs.h>
#include <parser_v2.hpp>
#include <string>
namespace argument_parser {
class macos_parser : public base_parser {
public:
macos_parser();
};
namespace v2 {
class macos_parser : public v2::base_parser {
public:
macos_parser();
};
} // namespace v2
} // namespace argument_parser
#endif
#endif

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#pragma once
#ifdef _WIN32
#include <argument_parser.hpp>
#include <parser_v2.hpp>
namespace argument_parser {
class windows_parser : public base_parser {
public:
windows_parser();
};
namespace v2 {
class windows_parser : public v2::base_parser {
public:
windows_parser();
};
} // namespace v2
} // namespace argument_parser
#endif

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#include "macos_parser.hpp"
#include <string> #include <string>
#define ALLOW_DASH_FOR_WINDOWS 0 #define ALLOW_DASH_FOR_WINDOWS 0
#include <parser_v2.hpp>
#include <argparse> #include <argparse>
#include <expected>
#include <iostream>
#include <fstream> #include <fstream>
#include <iostream>
#include <parser_v2.hpp>
#include <regex> #include <regex>
#include <sstream>
#include <vector> #include <vector>
struct Point { struct Point {
int x, y; int x, y;
}; };
template<> template <> struct argument_parser::parsing_traits::parser_trait<Point> {
struct argument_parser::parsing_traits::parser_trait<Point> { static Point parse(const std::string &input) {
static Point parse(const std::string& input) { auto comma_pos = input.find(',');
auto comma_pos = input.find(','); if (comma_pos == std::string::npos) {
if (comma_pos == std::string::npos) { throw std::runtime_error("Invalid Point format. Expected 'x,y'.");
throw std::runtime_error("Invalid Point format. Expected 'x,y'."); }
} int x = std::stoi(input.substr(0, comma_pos));
int x = std::stoi(input.substr(0, comma_pos)); int y = std::stoi(input.substr(comma_pos + 1));
int y = std::stoi(input.substr(comma_pos + 1)); return {x, y};
return {x, y};
}
};
template<>
struct argument_parser::parsing_traits::parser_trait<std::regex> {
static std::regex parse(const std::string& input) {
return std::regex(input);
}
};
template<>
struct argument_parser::parsing_traits::parser_trait<std::vector<int>> {
static std::vector<int> parse(const std::string& input) {
std::vector<int> result;
std::stringstream ss(input);
std::string item;
while (std::getline(ss, item, ',')) {
result.push_back(std::stoi(item));
}
return result;
}
};
template<>
struct argument_parser::parsing_traits::parser_trait<std::vector<std::string>> {
static std::vector<std::string> parse(const std::string& input) {
std::vector<std::string> result;
auto copyInput = input;
if (input.starts_with("[")) {
copyInput = input.substr(1, input.size());
if (copyInput.ends_with("]")) {
copyInput = copyInput.substr(0, copyInput.size() - 1);
} else {
throw std::runtime_error("Invalid vector<string> format. Expected closing ']'.");
}
}
std::stringstream ss(copyInput);
std::string item;
while (std::getline(ss, item, ',')) {
result.push_back(item);
}
return result;
}
};
const std::initializer_list<argument_parser::conventions::convention const* const> conventions = {
&argument_parser::conventions::gnu_argument_convention,
&argument_parser::conventions::gnu_equal_argument_convention,
&argument_parser::conventions::windows_argument_convention,
&argument_parser::conventions::windows_equal_argument_convention
};
const auto echo = argument_parser::helpers::make_parametered_action<std::string>([](std::string const& text) {
std::cout << text << std::endl;
});
const auto echo_point = argument_parser::helpers::make_parametered_action<Point>([](Point const& point) {
std::cout << "Point(" << point.x << ", " << point.y << ")" << std::endl;
});
const auto cat = argument_parser::helpers::make_parametered_action<std::string>([](std::string const& file_name) {
std::ifstream file(file_name);
if (!file.is_open()) {
throw std::runtime_error("Could not open file");
}
std::string line;
while (std::getline(file, line)) {
std::cout << line << std::endl;
}
file.close();
});
auto grep(argument_parser::base_parser const& parser, std::string const& filename, std::regex const& pattern) {
if (filename.empty()) {
std::cerr << "Missing filename" << std::endl;
parser.display_help(conventions);
exit(-1);
}
std::ifstream file(filename);
if (!file.is_open()) {
std::cerr << "Could not open file: \"" << filename << '"' << std::endl;
exit(-1);
}
for (std::string line; std::getline(file, line);) {
if (std::regex_search(line, pattern)) {
std::cout << line << std::endl;
}
}
file.close();
}
void run_grep(argument_parser::base_parser const& parser) {
auto filename = parser.get_optional<std::string>("file");
auto pattern = parser.get_optional<std::regex>("grep");
if (filename && pattern) {
grep(parser, filename.value(), pattern.value());
} else if (filename) {
std::cerr << "Missing grep pattern" << std::endl;
parser.display_help(conventions);
exit(-1);
} else if (pattern) {
std::cerr << "Missing filename" << std::endl;
parser.display_help(conventions);
exit(-1);
}
}
int v1Examples() {
auto parser = argument_parser::parser{};
parser.add_argument("e", "echo", "echoes given variable", echo, false);
parser.add_argument("ep", "echo-point", "echoes given point", echo_point, false);
parser.add_argument<std::string>("f", "file", "File to grep, required only if using grep", false);
parser.add_argument<std::regex>("g", "grep", "Grep pattern, required only if using grep", false);
parser.add_argument("c", "cat", "Prints the content of the file", cat, false);
parser.add_argument("h", "help", "Displays this help text.", argument_parser::helpers::make_non_parametered_action([&parser]{
parser.display_help(conventions);
}), false);
parser.add_argument<Point>("p", "point", "Test point", false);
parser.add_argument<std::vector<int>>("t", "test", "Test vector<int>", false);
parser.add_argument<std::vector<std::string>>("ts", "test-strings", "Test vector<string>", false);
parser.on_complete(::run_grep);
try {
parser.handle_arguments(conventions);
} catch(std::exception const& e) {
std::cerr << "Error: " << e.what() << std::endl;
parser.display_help(conventions);
return -1;
} }
};
auto test = parser.get_optional<std::vector<int>>("test");
if (test) {
for (auto const& item : test.value()) {
std::cout << item << std::endl;
}
}
auto test_strings = parser.get_optional<std::vector<std::string>>("test-strings"); template <> struct argument_parser::parsing_traits::parser_trait<std::regex> {
if (test_strings) { static std::regex parse(const std::string &input) {
for (auto const& item : test_strings.value()) { return std::regex(input);
std::cout << item << std::endl; }
} };
}
return 0; template <> struct argument_parser::parsing_traits::parser_trait<std::vector<int>> {
static std::vector<int> parse(const std::string &input) {
std::vector<int> result;
std::stringstream ss{input};
std::string item;
while (std::getline(ss, item, ',')) {
result.push_back(std::stoi(item));
}
return result;
}
};
template <> struct argument_parser::parsing_traits::parser_trait<std::vector<std::string>> {
static std::vector<std::string> parse(const std::string &input) {
std::vector<std::string> result;
std::stringstream ss{input};
std::string item;
while (std::getline(ss, item, ',')) {
result.push_back(item);
}
return result;
}
};
const std::initializer_list<argument_parser::conventions::convention const *const> conventions = {
&argument_parser::conventions::gnu_argument_convention,
&argument_parser::conventions::gnu_equal_argument_convention,
&argument_parser::conventions::windows_argument_convention,
&argument_parser::conventions::windows_equal_argument_convention};
const auto echo = argument_parser::helpers::make_parametered_action<std::string>(
[](std::string const &text) { std::cout << text << std::endl; });
const auto echo_point = argument_parser::helpers::make_parametered_action<Point>(
[](Point const &point) { std::cout << "Point(" << point.x << ", " << point.y << ")" << std::endl; });
const auto cat = argument_parser::helpers::make_parametered_action<std::string>([](std::string const &file_name) {
std::ifstream file(file_name);
if (!file.is_open()) {
throw std::runtime_error("Could not open file");
}
std::string line;
while (std::getline(file, line)) {
std::cout << line << std::endl;
}
file.close();
});
auto grep(argument_parser::base_parser const &parser, std::string const &filename, std::regex const &pattern) {
if (filename.empty()) {
std::cerr << "Missing filename" << std::endl;
parser.display_help(conventions);
exit(-1);
}
std::ifstream file(filename);
if (!file.is_open()) {
std::cerr << "Could not open file: \"" << filename << '"' << std::endl;
exit(-1);
}
for (std::string line; std::getline(file, line);) {
if (std::regex_search(line, pattern)) {
std::cout << line << std::endl;
}
}
file.close();
}
void run_grep(argument_parser::base_parser const &parser) {
auto filename = parser.get_optional<std::string>("file");
auto pattern = parser.get_optional<std::regex>("grep");
if (filename && pattern) {
grep(parser, filename.value(), pattern.value());
} else if (filename) {
std::cerr << "Missing grep pattern" << std::endl;
parser.display_help(conventions);
exit(-1);
} else if (pattern) {
std::cerr << "Missing filename" << std::endl;
parser.display_help(conventions);
exit(-1);
}
}
void run_store_point(argument_parser::base_parser const &parser) {
auto point = parser.get_optional<Point>("store-point");
if (point) {
std::cout << "Point(" << point->x << ", " << point->y << ")" << std::endl;
}
} }
int v2Examples() { int v2Examples() {
using namespace argument_parser::v2::flags; using namespace argument_parser::v2::flags;
argument_parser::v2::macos_parser parser; argument_parser::v2::parser parser;
parser.add_argument<std::string>({ parser.add_argument<std::string>(
{ ShortArgument, "e" }, {{ShortArgument, "e"}, {LongArgument, "echo"}, {Action, echo}, {HelpText, "echoes given variable"}});
{ LongArgument, "echo" },
{ Action, echo }
});
parser.add_argument<Point>({ parser.add_argument<Point>(
{ ShortArgument, "ep" }, {{ShortArgument, "ep"}, {LongArgument, "echo-point"}, {Action, echo_point}, {HelpText, "echoes given point"}});
{ LongArgument, "echo-point" },
{ Action, echo_point }
});
parser.add_argument<std::string>({ // stores string for f/file flag parser.add_argument<std::string>({
{ ShortArgument, "f" }, // stores string for f/file flag
{ LongArgument, "file"}, {ShortArgument, "f"},
// if no action, falls to store operation with given type. {LongArgument, "file"},
}); {HelpText, "File to grep, required only if using grep"},
// if no action, falls to store operation with given type.
});
parser.add_argument<std::regex>({ // stores string for g/grep flag parser.add_argument<std::regex>({
{ ShortArgument, "g" }, // stores string for g/grep flag
{ LongArgument, "grep" }, {ShortArgument, "g"},
// same as 'file' flag {LongArgument, "grep"},
}); {HelpText, "Grep pattern, required only if using file"},
// same as 'file' flag
});
parser.add_argument<std::string>({ parser.add_argument<std::string>(
{ ShortArgument, "c" }, {{ShortArgument, "c"}, {LongArgument, "cat"}, {Action, cat}, {HelpText, "Prints the content of the file"}});
{ LongArgument, "cat" },
{ Action, cat }
});
parser.add_argument<Point>({ parser.add_argument<Point>({
// { ShortArgument, "sp" }, // now if ShortArgument or LongArgument is missing, it will use it for the other. // { ShortArgument, "sp" }, // now if ShortArgument or LongArgument is missing, it will use it for the other.
{ LongArgument, "store-point" }, {LongArgument, "store-point"},
{ Required, true } // makes this flag required {Required, true} // makes this flag required
}); });
parser.on_complete(::run_grep); parser.on_complete(::run_grep);
parser.on_complete(::run_store_point);
parser.handle_arguments(conventions); parser.handle_arguments(conventions);
return 0; return 0;
} }
int main() { int main() {
return v2Examples(); try {
return v2Examples();
} catch (std::exception const &e) {
std::cerr << "Error: " << e.what() << std::endl;
return -1;
}
} }

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#include "base_convention.hpp"
#include <algorithm>
namespace argument_parser::conventions::helpers {
std::string to_lower(std::string s) {
std::transform(s.begin(), s.end(), s.begin(), [](unsigned char c) { return std::tolower(c); });
return s;
}
std::string to_upper(std::string s) {
std::transform(s.begin(), s.end(), s.begin(), [](unsigned char c) { return std::toupper(c); });
return s;
}
} // namespace argument_parser::conventions::helpers

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src/source/conventions/implementations/gnu_argument_convention.cpp Normal file
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#include "gnu_argument_convention.hpp"
#include "base_convention.hpp"
#include <stdexcept>
bool starts_with(std::string const &s, std::string const &prefix) {
return s.rfind(prefix, 0) == 0;
}
namespace argument_parser::conventions::implementations {
parsed_argument gnu_argument_convention::get_argument(std::string const &raw) const {
if (starts_with(raw, long_prec()))
return {argument_type::LONG, raw.substr(2)};
else if (starts_with(raw, short_prec()))
return {argument_type::SHORT, raw.substr(1)};
else
return {argument_type::ERROR, "GNU standard convention does not allow arguments without a preceding dash."};
}
std::string gnu_argument_convention::extract_value(std::string const & /*raw*/) const {
throw std::runtime_error("No inline value in standard GNU convention.");
}
bool gnu_argument_convention::requires_next_token() const {
return true;
}
std::string gnu_argument_convention::name() const {
return "GNU-style long options";
}
std::string gnu_argument_convention::short_prec() const {
return "-";
}
std::string gnu_argument_convention::long_prec() const {
return "--";
}
} // namespace argument_parser::conventions::implementations
namespace argument_parser::conventions::implementations {
parsed_argument gnu_equal_argument_convention::get_argument(std::string const &raw) const {
auto pos = raw.find('=');
auto arg = pos != std::string::npos ? raw.substr(0, pos) : raw;
if (starts_with(arg, long_prec()))
return {argument_type::LONG, arg.substr(2)};
else if (starts_with(arg, short_prec()))
return {argument_type::SHORT, arg.substr(1)};
else
return {argument_type::ERROR, "GNU standard convention does not allow arguments without a preceding dash."};
}
std::string gnu_equal_argument_convention::extract_value(std::string const &raw) const {
auto pos = raw.find('=');
if (pos == std::string::npos || pos + 1 >= raw.size())
throw std::runtime_error("Expected value after '='.");
return raw.substr(pos + 1);
}
bool gnu_equal_argument_convention::requires_next_token() const {
return false;
}
std::string gnu_equal_argument_convention::name() const {
return "GNU-style long options (equal signed form)";
}
std::string gnu_equal_argument_convention::short_prec() const {
return "-";
}
std::string gnu_equal_argument_convention::long_prec() const {
return "--";
}
} // namespace argument_parser::conventions::implementations

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#include "windows_argument_convention.hpp"
#include <stdexcept>
namespace argument_parser::conventions::implementations {
windows_argument_convention::windows_argument_convention(bool accept_dash) : accept_dash_(accept_dash) {}
parsed_argument windows_argument_convention::get_argument(std::string const &raw) const {
if (raw.empty()) {
return {argument_type::ERROR, "Empty argument token."};
}
const char c0 = raw[0];
const bool ok_prefix = (c0 == '/') || (accept_dash_ && c0 == '-');
if (!ok_prefix) {
return {argument_type::ERROR,
accept_dash_ ? "Windows-style expects options to start with '/' (or '-' in compat mode)."
: "Windows-style expects options to start with '/'."};
}
if (raw.find_first_of("=:") != std::string::npos) {
return {argument_type::ERROR,
"Inline values are not allowed in this convention; provide the value in the next token."};
}
std::string name = helpers::to_lower(raw.substr(1));
if (name.empty()) {
return {argument_type::ERROR, "Option name cannot be empty after '/'."};
}
return {argument_type::INTERCHANGABLE, std::move(name)};
}
std::string windows_argument_convention::extract_value(std::string const & /*raw*/) const {
throw std::runtime_error("No inline value; value must be provided in the next token.");
}
bool windows_argument_convention::requires_next_token() const {
return true;
}
std::string windows_argument_convention::name() const {
return "Windows style options (next-token values)";
}
std::string windows_argument_convention::short_prec() const {
return accept_dash_ ? "-" : "/";
}
std::string windows_argument_convention::long_prec() const {
return "/";
}
} // namespace argument_parser::conventions::implementations
namespace argument_parser::conventions::implementations {
windows_kv_argument_convention::windows_kv_argument_convention(bool accept_dash) : accept_dash_(accept_dash) {}
parsed_argument windows_kv_argument_convention::get_argument(std::string const &raw) const {
if (raw.empty()) {
return {argument_type::ERROR, "Empty argument token."};
}
const char c0 = raw[0];
const bool ok_prefix = (c0 == '/') || (accept_dash_ && c0 == '-');
if (!ok_prefix) {
return {argument_type::ERROR,
accept_dash_ ? "Windows-style expects options to start with '/' (or '-' in compat mode)."
: "Windows-style expects options to start with '/'."};
}
const std::size_t sep = raw.find_first_of("=:");
if (sep == std::string::npos) {
return {argument_type::ERROR,
"Expected an inline value using '=' or ':' (e.g., /opt=value or /opt:value)."};
}
if (sep == 1) {
return {argument_type::ERROR, "Option name cannot be empty before '=' or ':'."};
}
std::string name = helpers::to_lower(raw.substr(1, sep - 1));
return {argument_type::INTERCHANGABLE, std::move(name)};
}
std::string windows_kv_argument_convention::extract_value(std::string const &raw) const {
const std::size_t sep = raw.find_first_of("=:");
if (sep == std::string::npos || sep + 1 >= raw.size())
throw std::runtime_error("Expected a value after '=' or ':'.");
return raw.substr(sep + 1);
}
bool windows_kv_argument_convention::requires_next_token() const {
return false;
}
std::string windows_kv_argument_convention::name() const {
return "Windows-style options (inline values via '=' or ':')";
}
std::string windows_kv_argument_convention::short_prec() const {
return accept_dash_ ? "-" : "/";
}
std::string windows_kv_argument_convention::long_prec() const {
return "/";
}
} // namespace argument_parser::conventions::implementations

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#include "argument_parser.hpp"
#include <iostream>
#include <sstream>
bool contains(std::unordered_map<std::string, int> const &map, std::string const &key) {
return map.find(key) != map.end();
}
namespace argument_parser {
argument::argument()
: id(0), name(), action(std::make_unique<non_parametered_action>([]() {})), required(false), invoked(false) {}
argument::argument(const argument &other)
: id(other.id), name(other.name), action(other.action->clone()), required(other.required),
invoked(other.invoked), help_text(other.help_text) {}
argument &argument::operator=(const argument &other) {
if (this != &other) {
id = other.id;
name = other.name;
action = other.action->clone();
required = other.required;
invoked = other.invoked;
help_text = other.help_text;
}
return *this;
}
bool argument::expects_parameter() const {
return action->expects_parameter();
}
bool argument::is_required() const {
return required;
}
bool argument::is_invoked() const {
return invoked;
}
std::string argument::get_name() const {
return name;
}
std::string argument::get_help_text() const {
return help_text;
}
void argument::set_required(bool val) {
required = val;
}
void argument::set_invoked(bool val) {
invoked = val;
}
void argument::set_help_text(std::string const &text) {
help_text = text;
}
void base_parser::on_complete(std::function<void(base_parser const &)> const &handler) {
on_complete_events.emplace_back(handler);
}
std::string
base_parser::build_help_text(std::initializer_list<conventions::convention const *const> convention_types) const {
std::stringstream ss;
ss << "Usage: " << program_name << " [OPTIONS]...\n";
for (auto const &[id, arg] : argument_map) {
auto short_arg = reverse_short_arguments.at(id);
auto long_arg = reverse_long_arguments.at(id);
ss << "\t";
for (auto const &convention : convention_types) {
ss << convention->short_prec() << short_arg << ", " << convention->long_prec() << long_arg << "\t";
}
ss << arg.help_text << "\n";
}
return ss.str();
}
argument &base_parser::get_argument(conventions::parsed_argument const &arg) {
if (arg.first == conventions::argument_type::LONG) {
auto long_pos = long_arguments.find(arg.second);
if (long_pos != long_arguments.end())
return argument_map.at(long_pos->second);
} else if (arg.first == conventions::argument_type::SHORT) {
auto short_pos = short_arguments.find(arg.second);
if (short_pos != short_arguments.end())
return argument_map.at(short_pos->second);
} else if (arg.first == conventions::argument_type::INTERCHANGABLE) {
auto long_pos = long_arguments.find(arg.second);
if (long_pos != long_arguments.end())
return argument_map.at(long_pos->second);
auto short_pos = short_arguments.find(arg.second);
if (short_pos != short_arguments.end())
return argument_map.at(short_pos->second);
}
throw std::runtime_error("Unknown argument: " + arg.second);
}
void base_parser::handle_arguments(std::initializer_list<conventions::convention const *const> convention_types) {
for (auto it = parsed_arguments.begin(); it != parsed_arguments.end(); ++it) {
std::stringstream error_stream;
bool arg_correctly_handled = false;
for (auto const &convention_type : convention_types) {
auto extracted = convention_type->get_argument(*it);
if (extracted.first == conventions::argument_type::ERROR) {
error_stream << "Convention \"" << convention_type->name() << "\" failed with: " << extracted.second
<< "\n";
continue;
}
try {
argument &corresponding_argument = get_argument(extracted);
if (corresponding_argument.expects_parameter()) {
if (convention_type->requires_next_token() && (it + 1) == parsed_arguments.end()) {
throw std::runtime_error("expected value for argument " + extracted.second);
}
auto value_raw =
convention_type->requires_next_token() ? *(++it) : convention_type->extract_value(*it);
corresponding_argument.action->invoke_with_parameter(value_raw);
} else {
corresponding_argument.action->invoke();
}
corresponding_argument.set_invoked(true);
arg_correctly_handled = true;
break; // Convention succeeded, move to the next argument token
} catch (const std::runtime_error &e) {
error_stream << "Convention \"" << convention_type->name() << "\" failed with: " << e.what()
<< "\n";
}
}
if (!arg_correctly_handled) {
throw std::runtime_error("All trials for argument: \n\t\"" + *it + "\"\n failed with: \n" +
error_stream.str());
}
}
check_for_required_arguments(convention_types);
fire_on_complete_events();
}
void base_parser::display_help(std::initializer_list<conventions::convention const *const> convention_types) const {
std::cout << build_help_text(convention_types);
}
std::optional<int> base_parser::find_argument_id(std::string const &arg) const {
auto long_pos = long_arguments.find(arg);
auto short_post = short_arguments.find(arg);
if (long_pos != long_arguments.end())
return long_pos->second;
if (short_post != short_arguments.end())
return short_post->second;
return std::nullopt;
}
void base_parser::assert_argument_not_exist(std::string const &short_arg, std::string const &long_arg) const {
if (contains(short_arguments, short_arg) || contains(long_arguments, long_arg)) {
throw std::runtime_error("The key already exists!");
}
}
void base_parser::set_argument_status(bool is_required, std::string const &help_text, argument &arg) {
arg.set_required(is_required);
arg.set_help_text(help_text);
}
void base_parser::place_argument(int id, argument const &arg, std::string const &short_arg,
std::string const &long_arg) {
argument_map[id] = arg;
short_arguments[short_arg] = id;
reverse_short_arguments[id] = short_arg;
long_arguments[long_arg] = id;
reverse_long_arguments[id] = long_arg;
}
void base_parser::check_for_required_arguments(
std::initializer_list<conventions::convention const *const> convention_types) {
std::vector<std::pair<std::string, std::string>> required_args;
for (auto const &[key, arg] : argument_map) {
if (arg.is_required() && !arg.is_invoked()) {
required_args.emplace_back<std::pair<std::string, std::string>>(
{reverse_short_arguments[key], reverse_long_arguments[key]});
}
}
if (!required_args.empty()) {
std::cerr << "These arguments were expected but not provided: ";
for (auto const &[s, l] : required_args) {
std::cerr << "[-" << s << ", --" << l << "] ";
}
std::cerr << "\n";
display_help(convention_types);
}
}
void base_parser::fire_on_complete_events() const {
for (auto const &event : on_complete_events) {
event(*this);
}
}
} // namespace argument_parser

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#include "fake_parser.hpp"
namespace argument_parser {
fake_parser::fake_parser(std::string program_name, std::vector<std::string> const &arguments) {
this->program_name = std::move(program_name);
parsed_arguments = arguments;
}
fake_parser::fake_parser(std::string const &program_name, std::vector<std::string> &&arguments) {
this->program_name = program_name;
parsed_arguments = std::move(arguments);
}
fake_parser::fake_parser(std::string const &program_name, std::initializer_list<std::string> const &arguments)
: fake_parser(program_name, std::vector<std::string>(arguments)) {}
void fake_parser::set_program_name(std::string const &program_name) {
this->program_name = program_name;
}
void fake_parser::set_parsed_arguments(std::vector<std::string> const &parsed_arguments) {
this->parsed_arguments = parsed_arguments;
}
} // namespace argument_parser

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#include "traits.hpp"
#include <stdexcept>
namespace argument_parser::parsing_traits {
std::string parser_trait<std::string>::parse(const std::string &input) {
return input;
}
bool parser_trait<bool>::parse(const std::string &input) {
if (input == "t" || input == "true" || input == "1")
return true;
if (input == "f" || input == "false" || input == "0")
return false;
throw std::runtime_error("Invalid boolean value: " + input);
}
int parser_trait<int>::parse(const std::string &input) {
return std::stoi(input);
}
float parser_trait<float>::parse(const std::string &input) {
return std::stof(input);
}
double parser_trait<double>::parse(const std::string &input) {
return std::stod(input);
}
} // namespace argument_parser::parsing_traits

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src/source/parser/platform_parsers/linux_parser.cpp Normal file
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#ifdef __linux__
#include "linux_parser.hpp"
#include <fstream>
#include <string>
namespace argument_parser {
linux_parser::linux_parser() {
std::ifstream command_line_file{"/proc/self/cmdline"};
std::getline(command_line_file, program_name, '\0');
for (std::string line; std::getline(command_line_file, line, '\0');) {
parsed_arguments.emplace_back(line);
}
}
namespace v2 {
linux_parser::linux_parser() {
std::ifstream command_line_file{"/proc/self/cmdline"};
std::string program_name;
std::getline(command_line_file, program_name, '\0');
set_program_name(program_name);
for (std::string line; std::getline(command_line_file, line, '\0');) {
parsed_arguments.emplace_back(line);
}
}
} // namespace v2
} // namespace argument_parser
#endif

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src/source/parser/platform_parsers/macos_parser.cpp Normal file
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#ifdef __APPLE__
#include "macos_parser.hpp"
namespace argument_parser {
macos_parser::macos_parser() {
const int argc = *_NSGetArgc();
if (char **argv = *_NSGetArgv(); argc > 0 && argv != nullptr && argv[0] != nullptr) {
program_name = (argv[0]);
for (int i = 1; i < argc; ++i) {
if (argv[i] != nullptr)
parsed_arguments.emplace_back(argv[i]);
}
}
}
namespace v2 {
macos_parser::macos_parser() {
const int argc = *_NSGetArgc();
if (char **argv = *_NSGetArgv(); argc > 0 && argv != nullptr && argv[0] != nullptr) {
set_program_name(argv[0]);
for (int i = 1; i < argc; ++i) {
if (argv[i] != nullptr)
ref_parsed_args().emplace_back(argv[i]);
}
}
}
} // namespace v2
} // namespace argument_parser
#endif

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#ifdef _WIN32
#include "windows_parser.hpp"
#include <Windows.h>
#include <iostream>
#include <memory>
#include <shellapi.h>
#include <stdexcept>
#include <string>
using namespace std::string_literals;
struct local_free_deleter {
void operator()(void *ptr) const {
if (ptr == nullptr) {
return;
}
LocalFree(static_cast<HLOCAL>(ptr));
}
};
std::string windows_error_message(DWORD error_code) {
LPSTR messageBuffer = nullptr;
size_t size = FormatMessageA(
FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, nullptr,
error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), reinterpret_cast<LPSTR>(&messageBuffer), 0, nullptr);
if (size == 0 || !messageBuffer) {
return "Unknown Error ("s + std::to_string(error_code) + ")";
}
std::unique_ptr<char, local_free_deleter> smartBuffer(messageBuffer);
std::string result(smartBuffer.get(), size);
result.erase(result.find_last_not_of(" \n\r\t") + 1);
return result;
}
std::string utf8_from_wstring(const std::wstring &w) {
if (w.empty())
return {};
int needed = ::WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, w.data(), static_cast<int>(w.size()), nullptr, 0,
nullptr, nullptr);
if (needed <= 0) {
throw std::runtime_error("WideCharToMultiByte sizing failed ("s + windows_error_message(::GetLastError()) +
")");
}
std::string out;
out.resize(needed);
int written = ::WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS, w.data(), static_cast<int>(w.size()), out.data(),
needed, nullptr, nullptr);
if (written <= 0) {
throw std::runtime_error(
"WideCharToMultiByte convert failed, Error("s + windows_error_message(::GetLastError()) + ")" +
" Size (Needed): " + std::to_string(needed) + " Size (Written): " + std::to_string(written) +
" Size (Allocated): " + std::to_string(out.size()));
}
return out;
}
void parse_windows_arguments(std::vector<std::string> &parsed_arguments,
std::function<void(std::string)> const &setProgramName) {
int argc_w;
std::unique_ptr<LPWSTR[], local_free_deleter> argv_w(CommandLineToArgvW(GetCommandLineW(), &argc_w));
if (argv_w == nullptr) {
throw std::runtime_error("CommandLineToArgvW failed");
}
if (argc_w <= 0) {
return;
}
setProgramName(utf8_from_wstring(argv_w[0]));
for (int i = 1; i < argc_w; i++) {
try {
std::string arg = utf8_from_wstring(argv_w[i]);
parsed_arguments.emplace_back(arg);
} catch (std::runtime_error e) {
std::cerr << "Error: " << e.what() << std::endl;
}
}
}
namespace argument_parser {
windows_parser::windows_parser() {
parse_windows_arguments(parsed_arguments,
[this](std::string const &program_name) { this->program_name = program_name; });
}
} // namespace argument_parser
namespace argument_parser::v2 {
windows_parser::windows_parser() {
parse_windows_arguments(ref_parsed_args(),
[this](std::string const &program_name) { this->set_program_name(program_name); });
}
} // namespace argument_parser::v2
#endif