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35 lines
1.1 KiB
C++
35 lines
1.1 KiB
C++
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// Copyright (c) 2017-2022 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_APPLY_SINGLE_HPP
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#define TAO_PEGTL_INTERNAL_APPLY_SINGLE_HPP
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#include "../config.hpp"
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#include <type_traits>
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namespace TAO_PEGTL_NAMESPACE::internal
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{
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template< typename Action >
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struct apply_single
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{
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template< typename ActionInput, typename... States >
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[[nodiscard]] static auto match( const ActionInput& in, States&&... st ) noexcept( noexcept( Action::apply( in, st... ) ) )
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-> std::enable_if_t< std::is_same_v< decltype( Action::apply( in, st... ) ), void >, bool >
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{
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Action::apply( in, st... );
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return true;
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}
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template< typename ActionInput, typename... States >
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[[nodiscard]] static auto match( const ActionInput& in, States&&... st ) noexcept( noexcept( Action::apply( in, st... ) ) )
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-> std::enable_if_t< std::is_same_v< decltype( Action::apply( in, st... ) ), bool >, bool >
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{
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return Action::apply( in, st... );
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}
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};
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} // namespace TAO_PEGTL_NAMESPACE::internal
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#endif
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