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Contents
// Copyright (c) 2020-2022 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
#ifndef TAO_PEGTL_CONTRIB_INTERNAL_SET_STACK_GUARD_HPP
#define TAO_PEGTL_CONTRIB_INTERNAL_SET_STACK_GUARD_HPP
#include <set>
#include <utility>
#include "../../config.hpp"
namespace TAO_PEGTL_NAMESPACE::internal
{
template< typename... Cs >
class [[nodiscard]] set_stack_guard
{
public:
template< typename... Ts >
set_stack_guard( std::set< Cs... >& set, Ts&&... ts )
: m_i( set.emplace( std::forward< Ts >( ts )... ) ),
m_s( set )
{}
set_stack_guard( set_stack_guard&& ) = delete;
set_stack_guard( const set_stack_guard& ) = delete;
set_stack_guard& operator=( set_stack_guard&& ) = delete;
set_stack_guard& operator=( const set_stack_guard& ) = delete;
~set_stack_guard()
{
if( m_i.second ) {
m_s.erase( m_i.first );
}
}
explicit operator bool() const noexcept
{
return m_i.second;
}
private:
const std::pair< typename std::set< Cs... >::iterator, bool > m_i;
std::set< Cs... >& m_s;
};
template< typename... Cs >
set_stack_guard( std::set< Cs... >&, const typename std::set< Cs... >::value_type& ) -> set_stack_guard< Cs... >;
} // namespace TAO_PEGTL_NAMESPACE::internal
#endif
Version data entries
13 entries across 13 versions & 1 rubygems