proto3_parse.cpp

// Copyright (c) 2017-2026 Dr. Colin Hirsch and Daniel Frey
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt)

#if !defined( __cpp_exceptions )
#include <iostream>
int main()
{
   std::cerr << "Exception support required, example unavailable." << std::endl;
   return 1;
}
#else

#include <iomanip>
#include <iostream>

#include <tao/pegtl.hpp>
#include <tao/pegtl/example/proto3.hpp>

namespace pegtl = TAO_PEGTL_NAMESPACE;

int main( int argc, char** argv )  // NOLINT(bugprone-exception-escape)
{
   using input_t = pegtl::text_file_input< pegtl::scan::lf_crlf >;
   for( int i = 1; i < argc; ++i ) {
      input_t in( argv[ i ] );
      try {
         pegtl::parse< pegtl::proto3::proto >( in );
      }
      catch( const decltype( in )::parse_error_t& e ) {
         const auto& p = e.position_object();
         std::cerr << e.what() << '\n'
                   << in.line_view_at( p ) << '\n'
                   << std::setw( int( p.column ) ) << '^' << '\n';
      }
   }
   return 0;
}

#endif