cxxopts/src/cxxopts.cpp

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2014-09-27 11:04:58 +04:00
#include "cxxopts.hpp"
namespace cxxopts
{
std::basic_regex<char> option_matcher
("--([[:alpha:]][-_[:alpha:]]+)(=(.*))?|-([a-zA-Z]+)");
std::basic_regex<char> option_specifier
("(([a-zA-Z]),)?([a-zA-Z][-_a-zA-Z]+)");
OptionAdder
Options::add_options()
{
return OptionAdder(*this);
}
OptionAdder&
OptionAdder::operator()
(
const std::string& opts,
const std::string& desc
)
{
std::match_results<const char*> result;
std::regex_match(opts.c_str(), result, option_specifier);
if (result.empty())
{
throw invalid_option_format_error(opts);
}
const auto& s = result[2];
const auto& l = result[3];
auto option = std::make_shared<OptionDetails>(desc);
if (s.length() != 0)
{
auto result = m_options.m_short.insert(std::make_pair(s.str()[0], option));
if (!result.second)
{
throw option_exists_error(s.str());
}
}
if (l.length() != 0)
{
auto result = m_options.m_long.insert(std::make_pair(l, option));
if (!result.second)
{
throw option_exists_error(l.str());
}
}
return *this;
}
}