46 lines
1.0 KiB
C++
46 lines
1.0 KiB
C++
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// Copyright (c) 2014-2019 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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#include <iostream>
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#include <string>
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#include <tao/pegtl.hpp>
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namespace pegtl = tao::pegtl;
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namespace hello
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{
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// clang-format off
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struct prefix : pegtl::string< 'H', 'e', 'l', 'l', 'o', ',', ' ' > {};
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struct name : pegtl::plus< pegtl::alpha > {};
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struct grammar : pegtl::must< prefix, name, pegtl::one< '!' >, pegtl::eof > {};
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// clang-format on
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template< typename Rule >
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struct action : pegtl::nothing<Rule>
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{};
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template<>
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struct action< name >
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{
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template< typename Input >
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static void apply( const Input& in, std::string& v )
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{
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v = in.string();
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}
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};
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} // namespace hello
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int main( int argc, char** argv )
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{
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if( argc > 1 ) {
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std::string name;
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pegtl::argv_input<> in( argv, 1 );
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pegtl::parse< hello::grammar, hello::action >( in, name );
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std::cout << "Good bye, " << name << "!" << std::endl;
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}
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}
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