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Contents
// Copyright (c) 2014-2020 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
#ifndef TAO_JSON_PEGTL_INTERNAL_ISTRING_HPP
#define TAO_JSON_PEGTL_INTERNAL_ISTRING_HPP
#include <type_traits>
#include "../config.hpp"
#include "bump_help.hpp"
#include "result_on_found.hpp"
#include "skip_control.hpp"
#include "trivial.hpp"
#include "../analysis/counted.hpp"
namespace TAO_JSON_PEGTL_NAMESPACE::internal
{
template< char C >
inline constexpr bool is_alpha = ( ( 'a' <= C ) && ( C <= 'z' ) ) || ( ( 'A' <= C ) && ( C <= 'Z' ) );
template< char C >
[[nodiscard]] bool ichar_equal( const char c ) noexcept
{
if constexpr( is_alpha< C > ) {
return ( C | 0x20 ) == ( c | 0x20 );
}
else {
return c == C;
}
}
template< char... Cs >
[[nodiscard]] bool istring_equal( const char* r ) noexcept
{
return ( ichar_equal< Cs >( *r++ ) && ... );
}
template< char... Cs >
struct istring;
template<>
struct istring<>
: trivial< true >
{
};
template< char... Cs >
struct istring
{
using analyze_t = analysis::counted< analysis::rule_type::any, sizeof...( Cs ) >;
template< typename Input >
[[nodiscard]] static bool match( Input& in ) noexcept( noexcept( in.size( 0 ) ) )
{
if( in.size( sizeof...( Cs ) ) >= sizeof...( Cs ) ) {
if( istring_equal< Cs... >( in.current() ) ) {
bump_help< result_on_found::success, Input, char, Cs... >( in, sizeof...( Cs ) );
return true;
}
}
return false;
}
};
template< char... Cs >
inline constexpr bool skip_control< istring< Cs... > > = true;
} // namespace TAO_JSON_PEGTL_NAMESPACE::internal
#endif
Version data entries
24 entries across 24 versions & 1 rubygems