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// Copyright (c) 2012-2013 The Cryptonote developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#pragma once
#include <iostream>
#include <type_traits>
#include <boost/program_options/parsers.hpp>
#include <boost/program_options/options_description.hpp>
#include <boost/program_options/variables_map.hpp>
#include "include_base_utils.h"
namespace command_line
{
template<typename T, bool required = false>
struct arg_descriptor;
template<typename T>
struct arg_descriptor<T, false>
{
typedef T value_type;
const char* name;
const char* description;
T default_value;
bool not_use_default;
};
template<typename T>
struct arg_descriptor<std::vector<T>, false>
{
typedef std::vector<T> value_type;
const char* name;
const char* description;
};
template<typename T>
struct arg_descriptor<T, true>
{
static_assert(!std::is_same<T, bool>::value, "Boolean switch can't be required");
typedef T value_type;
const char* name;
const char* description;
};
template<typename T>
boost::program_options::typed_value<T, char>* make_semantic(const arg_descriptor<T, true>& /*arg*/)
{
return boost::program_options::value<T>()->required();
}
template<typename T>
boost::program_options::typed_value<T, char>* make_semantic(const arg_descriptor<T, false>& arg)
{
auto semantic = boost::program_options::value<T>();
if (!arg.not_use_default)
semantic->default_value(arg.default_value);
return semantic;
}
template<typename T>
boost::program_options::typed_value<T, char>* make_semantic(const arg_descriptor<T, false>& arg, const T& def)
{
auto semantic = boost::program_options::value<T>();
if (!arg.not_use_default)
semantic->default_value(def);
return semantic;
}
template<typename T>
boost::program_options::typed_value<std::vector<T>, char>* make_semantic(const arg_descriptor<std::vector<T>, false>& /*arg*/)
{
auto semantic = boost::program_options::value< std::vector<T> >();
semantic->default_value(std::vector<T>(), "");
return semantic;
}
template<typename T, bool required>
void add_arg(boost::program_options::options_description& description, const arg_descriptor<T, required>& arg, bool unique = true)
{
if (0 != description.find_nothrow(arg.name, false))
{
CHECK_AND_ASSERT_MES(!unique, void(), "Argument already exists: " << arg.name);
return;
}
description.add_options()(arg.name, make_semantic(arg), arg.description);
}
template<typename T>
void add_arg(boost::program_options::options_description& description, const arg_descriptor<T, false>& arg, const T& def, bool unique = true)
{
if (0 != description.find_nothrow(arg.name, false))
{
CHECK_AND_ASSERT_MES(!unique, void(), "Argument already exists: " << arg.name);
return;
}
description.add_options()(arg.name, make_semantic(arg, def), arg.description);
}
template<>
inline void add_arg(boost::program_options::options_description& description, const arg_descriptor<bool, false>& arg, bool unique)
{
if (0 != description.find_nothrow(arg.name, false))
{
CHECK_AND_ASSERT_MES(!unique, void(), "Argument already exists: " << arg.name);
return;
}
description.add_options()(arg.name, boost::program_options::bool_switch(), arg.description);
}
template<typename charT>
boost::program_options::basic_parsed_options<charT> parse_command_line(int argc, const charT* const argv[],
const boost::program_options::options_description& desc, bool allow_unregistered = false)
{
auto parser = boost::program_options::command_line_parser(argc, argv);
parser.options(desc);
if (allow_unregistered)
{
parser.allow_unregistered();
}
return parser.run();
}
template<typename F>
bool handle_error_helper(const boost::program_options::options_description& desc, F parser)
{
try
{
return parser();
}
catch (std::exception& e)
{
std::cerr << "Failed to parse arguments: " << e.what() << std::endl;
std::cerr << desc << std::endl;
return false;
}
catch (...)
{
std::cerr << "Failed to parse arguments: unknown exception" << std::endl;
std::cerr << desc << std::endl;
return false;
}
}
template<typename T, bool required>
bool has_arg(const boost::program_options::variables_map& vm, const arg_descriptor<T, required>& arg)
{
auto value = vm[arg.name];
return !value.empty();
}
template<typename T, bool required>
T get_arg(const boost::program_options::variables_map& vm, const arg_descriptor<T, required>& arg)
{
return vm[arg.name].template as<T>();
}
template<>
inline bool has_arg<bool, false>(const boost::program_options::variables_map& vm, const arg_descriptor<bool, false>& arg)
{
return get_arg<bool, false>(vm, arg);
}
extern const arg_descriptor<bool> arg_help;
extern const arg_descriptor<bool> arg_version;
extern const arg_descriptor<std::string> arg_data_dir;
}
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