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68 lines
1.6 KiB
C++
68 lines
1.6 KiB
C++
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// Copyright (c) 2014-2022 Dr. Colin Hirsch and Daniel Frey
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// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
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#ifndef TAO_PEGTL_INTERNAL_STRING_HPP
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#define TAO_PEGTL_INTERNAL_STRING_HPP
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#include <cstring>
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#include <utility>
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#include "../config.hpp"
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#include "bump_help.hpp"
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#include "enable_control.hpp"
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#include "one.hpp"
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#include "result_on_found.hpp"
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#include "success.hpp"
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#include "../type_list.hpp"
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namespace TAO_PEGTL_NAMESPACE::internal
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{
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[[nodiscard]] inline bool unsafe_equals( const char* s, const std::initializer_list< char >& l ) noexcept
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{
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return std::memcmp( s, &*l.begin(), l.size() ) == 0;
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}
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template< char... Cs >
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struct string;
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template<>
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struct string<>
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: success
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{};
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// template< char C >
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// struct string
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// : one< C >
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// {};
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template< char... Cs >
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struct string
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{
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using rule_t = string;
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using subs_t = empty_list;
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template< int Eol >
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static constexpr bool can_match_eol = one< result_on_found::success, peek_char, Cs... >::template can_match_eol< Eol >;
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template< typename ParseInput >
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[[nodiscard]] static bool match( ParseInput& in ) noexcept( noexcept( in.size( 0 ) ) )
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{
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if( in.size( sizeof...( Cs ) ) >= sizeof...( Cs ) ) {
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if( unsafe_equals( in.current(), { Cs... } ) ) {
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bump_help< string >( in, sizeof...( Cs ) );
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return true;
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}
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}
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return false;
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}
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};
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template< char... Cs >
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inline constexpr bool enable_control< string< Cs... > > = false;
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} // namespace TAO_PEGTL_NAMESPACE::internal
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#endif
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