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43 lines
952 B
C++
43 lines
952 B
C++
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// Copyright (c) 2016-2022 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_REQUIRE_HPP
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#define TAO_PEGTL_INTERNAL_REQUIRE_HPP
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#include "../config.hpp"
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#include "enable_control.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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template< unsigned Amount >
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struct require;
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template<>
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struct require< 0 >
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: success
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{};
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template< unsigned Amount >
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struct require
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{
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using rule_t = require;
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using subs_t = empty_list;
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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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return in.size( Amount ) >= Amount;
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}
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};
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template< unsigned Amount >
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inline constexpr bool enable_control< require< Amount > > = false;
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} // namespace TAO_PEGTL_NAMESPACE::internal
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#endif
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