geode/codegen/Broma/PEGTL-3.2.7/include/tao/pegtl/internal/ranges.hpp
2022-07-30 19:24:03 +03:00

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2.5 KiB
C++
Executable file

// 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_RANGES_HPP
#define TAO_PEGTL_INTERNAL_RANGES_HPP
#include "../config.hpp"
#include <utility>
#include "bump_help.hpp"
#include "enable_control.hpp"
#include "failure.hpp"
#include "one.hpp"
#include "range.hpp"
#include "../type_list.hpp"
namespace TAO_PEGTL_NAMESPACE::internal
{
template< typename Char, Char Lo, Char Hi >
constexpr bool validate_range( Char c ) noexcept
{
static_assert( Lo <= Hi, "invalid range" );
return ( Lo <= c ) && ( c <= Hi );
}
template< typename Peek, typename Peek::data_t... Cs >
struct ranges
{
using peek_t = Peek;
using data_t = typename Peek::data_t;
using rule_t = ranges;
using subs_t = empty_list;
template< std::size_t... Is >
[[nodiscard]] static constexpr bool test( std::index_sequence< Is... > /*unused*/, const data_t c ) noexcept
{
constexpr const data_t cs[] = { Cs... };
if constexpr( sizeof...( Cs ) % 2 == 0 ) {
return ( validate_range< data_t, cs[ 2 * Is ], cs[ 2 * Is + 1 ] >( c ) || ... );
}
else {
return ( validate_range< data_t, cs[ 2 * Is ], cs[ 2 * Is + 1 ] >( c ) || ... ) || ( c == cs[ sizeof...( Cs ) - 1 ] );
}
}
[[nodiscard]] static constexpr bool test( const data_t c ) noexcept
{
return test( std::make_index_sequence< sizeof...( Cs ) / 2 >(), c );
}
template< int Eol >
static constexpr bool can_match_eol = test( Eol );
template< typename ParseInput >
[[nodiscard]] static bool match( ParseInput& in ) noexcept( noexcept( Peek::peek( in ) ) )
{
if( const auto t = Peek::peek( in ) ) {
if( test( t.data ) ) {
bump_help< ranges >( in, t.size );
return true;
}
}
return false;
}
};
template< typename Peek, typename Peek::data_t Lo, typename Peek::data_t Hi >
struct ranges< Peek, Lo, Hi >
: range< result_on_found::success, Peek, Lo, Hi >
{};
template< typename Peek, typename Peek::data_t C >
struct ranges< Peek, C >
: one< result_on_found::success, Peek, C >
{};
template< typename Peek >
struct ranges< Peek >
: failure
{};
template< typename Peek, typename Peek::data_t... Cs >
inline constexpr bool enable_control< ranges< Peek, Cs... > > = false;
} // namespace TAO_PEGTL_NAMESPACE::internal
#endif