// Copyright (c) 2014-2020 Dr. Colin Hirsch and Daniel Frey

// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/

#ifndef TAO_PEGTL_INTERNAL_PEEK_CHAR_HPP

#define TAO_PEGTL_INTERNAL_PEEK_CHAR_HPP

#include <cstddef>

#include "../config.hpp"

#include "input_pair.hpp"

namespace tao

{

   namespace TAO_PEGTL_NAMESPACE

   {

      namespace internal

      {

         struct peek_char

         {

            using data_t = char;

            using pair_t = input_pair< char >;

            template< typename Input >

            static pair_t peek( Input& in ) noexcept( noexcept( in.empty() ) )

            {

               if( in.empty() ) {

                  return { 0, 0 };

               }

               return { in.peek_char(), 1 };

            }

         };

      }  // namespace internal

   }  // namespace TAO_PEGTL_NAMESPACE

}  // namespace tao

#endif