mirror of
https://github.com/geode-sdk/geode.git
synced 2024-12-03 20:51:02 -05:00
80 lines
2.7 KiB
C++
Executable file
80 lines
2.7 KiB
C++
Executable file
// 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_VISIT_HPP
|
|
#define TAO_PEGTL_VISIT_HPP
|
|
|
|
#include <type_traits>
|
|
|
|
#include "config.hpp"
|
|
#include "type_list.hpp"
|
|
|
|
namespace TAO_PEGTL_NAMESPACE
|
|
{
|
|
namespace internal
|
|
{
|
|
template< typename Type, typename... Types >
|
|
inline constexpr bool contains_v = ( std::is_same_v< Type, Types > || ... );
|
|
|
|
template< typename Type, typename... Types >
|
|
struct contains
|
|
: std::bool_constant< contains_v< Type, Types... > >
|
|
{};
|
|
|
|
template< typename Type, typename... Types >
|
|
struct contains< Type, type_list< Types... > >
|
|
: contains< Type, Types... >
|
|
{};
|
|
|
|
template< typename Rules, typename Todo, typename Done >
|
|
struct filter
|
|
{
|
|
using type = Todo;
|
|
};
|
|
|
|
template< typename Rule, typename... Rules, typename... Todo, typename... Done >
|
|
struct filter< type_list< Rule, Rules... >, type_list< Todo... >, type_list< Done... > >
|
|
: filter< type_list< Rules... >, std::conditional_t< contains_v< Rule, Todo..., Done... >, type_list< Todo... >, type_list< Rule, Todo... > >, type_list< Done... > >
|
|
{};
|
|
|
|
template< typename Rules, typename Todo, typename Done >
|
|
using filter_t = typename filter< Rules, Todo, Done >::type;
|
|
|
|
template< typename Done, typename... Rules >
|
|
struct visit_list
|
|
{
|
|
using NextDone = type_list_concat_t< type_list< Rules... >, Done >;
|
|
using NextSubs = type_list_concat_t< typename Rules::subs_t... >;
|
|
using NextTodo = filter_t< NextSubs, empty_list, NextDone >;
|
|
|
|
using type = typename std::conditional_t< std::is_same_v< NextTodo, empty_list >, type_list_concat< NextDone >, visit_list< NextDone, NextTodo > >::type;
|
|
};
|
|
|
|
template< typename Done, typename... Rules >
|
|
struct visit_list< Done, type_list< Rules... > >
|
|
: visit_list< Done, Rules... >
|
|
{};
|
|
|
|
template< template< typename... > class Func, typename... Args, typename... Rules >
|
|
void visit( type_list< Rules... > /*unused*/, Args&&... args )
|
|
{
|
|
( Func< Rules >::visit( args... ), ... );
|
|
}
|
|
|
|
} // namespace internal
|
|
|
|
template< typename Grammar >
|
|
using rule_list_t = typename internal::visit_list< empty_list, Grammar >::type;
|
|
|
|
template< typename Grammar, typename Rule >
|
|
inline constexpr bool contains_v = internal::contains< Rule, rule_list_t< Grammar > >::value;
|
|
|
|
template< typename Rule, template< typename... > class Func, typename... Args >
|
|
void visit( Args&&... args )
|
|
{
|
|
internal::visit< Func >( rule_list_t< Rule >(), args... );
|
|
}
|
|
|
|
} // namespace TAO_PEGTL_NAMESPACE
|
|
|
|
#endif
|