93 lines
2.7 KiB
C++
93 lines
2.7 KiB
C++
// Copyright (c) 2014-2015 Dr. Colin Hirsch and Daniel Frey
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// Please see LICENSE for license or visit https://github.com/ColinH/PEGTL/
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#ifndef TAO_CPP_PEGTL_INTERNAL_RANGES_HH
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#define TAO_CPP_PEGTL_INTERNAL_RANGES_HH
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#include "any.hh"
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#include "range.hh"
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#include "bump_util.hh"
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#include "skip_control.hh"
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#include "../analysis/generic.hh"
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namespace tao_json_pegtl
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{
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namespace internal
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{
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template< int Eol, typename Char, Char ... Cs > struct ranges_impl;
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template< int Eol, typename Char >
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struct ranges_impl< Eol, Char >
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{
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static constexpr bool can_match_eol = false;
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static bool match( const Char )
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{
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return false;
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}
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};
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template< int Eol, typename Char, Char Eq >
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struct ranges_impl< Eol, Char, Eq >
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{
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static constexpr bool can_match_eol = ( Eq == Eol );
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static bool match( const Char c )
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{
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return c == Eq;
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}
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};
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template< int Eol, typename Char, Char Lo, Char Hi, Char ... Cs >
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struct ranges_impl< Eol, Char, Lo, Hi, Cs ... >
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{
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static constexpr bool can_match_eol = ( ( ( Lo <= Eol ) && ( Eol <= Hi ) ) || ranges_impl< Eol, Char, Cs ... >::can_match_eol );
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static bool match( const Char c )
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{
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return ( ( Lo <= c ) && ( c <= Hi ) ) || ranges_impl< Eol, Char, Cs ... >::match( c );
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}
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};
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template< typename Peek, typename Peek::data_t ... Cs >
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struct ranges
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{
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using analyze_t = analysis::generic< analysis::rule_type::ANY >;
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template< int Eol >
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struct can_match_eol
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{
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static constexpr bool value = ranges_impl< Eol, typename Peek::data_t, Cs ... >::can_match_eol;
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};
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template< typename Input >
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static bool match( Input & in )
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{
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using eol_t = typename Input::eol_t;
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if ( ! in.empty() ) {
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if ( const auto t = Peek::peek( in ) ) {
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if ( ranges_impl< eol_t::ch, typename Peek::data_t, Cs ... >::match( t.data ) ) {
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bump_impl< can_match_eol< eol_t::ch >::value >::bump( in, t.size );
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return true;
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}
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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< typename Peek, typename Peek::data_t Lo, typename Peek::data_t Hi >
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struct ranges< Peek, Lo, Hi >
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: range< result_on_found::SUCCESS, Peek, Lo, Hi > {};
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template< typename Peek, typename Peek::data_t ... Cs >
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struct skip_control< ranges< Peek, Cs ... > > : std::true_type {};
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} // namespace internal
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} // namespace tao_json_pegtl
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#endif
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