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Contents
// Copyright (c) 2014-2022 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
#ifndef TAO_PEGTL_INTERNAL_MARKER_HPP
#define TAO_PEGTL_INTERNAL_MARKER_HPP
#include "../config.hpp"
#include "../rewind_mode.hpp"
namespace TAO_PEGTL_NAMESPACE::internal
{
template< typename Iterator, rewind_mode M >
class [[nodiscard]] marker
{
public:
static constexpr rewind_mode next_rewind_mode = M;
explicit marker( const Iterator& /*unused*/ ) noexcept
{}
marker( const marker& ) = delete;
marker( marker&& ) = delete;
~marker() = default;
marker& operator=( const marker& ) = delete;
marker& operator=( marker&& ) = delete;
[[nodiscard]] bool operator()( const bool result ) const noexcept
{
return result;
}
};
template< typename Iterator >
class [[nodiscard]] marker< Iterator, rewind_mode::required >
{
public:
static constexpr rewind_mode next_rewind_mode = rewind_mode::active;
explicit marker( Iterator& i ) noexcept
: m_saved( i ),
m_input( &i )
{}
marker( const marker& ) = delete;
marker( marker&& ) = delete;
~marker()
{
if( m_input != nullptr ) {
( *m_input ) = m_saved;
}
}
marker& operator=( const marker& ) = delete;
marker& operator=( marker&& ) = delete;
[[nodiscard]] bool operator()( const bool result ) noexcept
{
if( result ) {
m_input = nullptr;
return true;
}
return false;
}
[[nodiscard]] const Iterator& iterator() const noexcept
{
return m_saved;
}
private:
const Iterator m_saved;
Iterator* m_input;
};
} // namespace TAO_PEGTL_NAMESPACE::internal
#endif
Version data entries
13 entries across 13 versions & 1 rubygems