// Copyright (c) 2017-2020 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/

#ifndef TAO_PEGTL_ARGV_INPUT_HPP
#define TAO_PEGTL_ARGV_INPUT_HPP

#include <cstddef>
#include <sstream>
#include <string>
#include <utility>

#include "config.hpp"
#include "eol.hpp"
#include "memory_input.hpp"
#include "tracking_mode.hpp"

namespace TAO_PEGTL_NAMESPACE
{
   namespace internal
   {
      [[nodiscard]] inline std::string make_argv_source( const std::size_t argn )
      {
         std::ostringstream os;
         os << "argv[" << argn << ']';
         return os.str();
      }

   }  // namespace internal

   template< tracking_mode P = tracking_mode::eager, typename Eol = eol::lf_crlf >
   struct argv_input
      : memory_input< P, Eol >
   {
      template< typename T >
      argv_input( char** argv, const std::size_t argn, T&& in_source )
         : memory_input< P, Eol >( static_cast< const char* >( argv[ argn ] ), std::forward< T >( in_source ) )
      {}

      argv_input( char** argv, const std::size_t argn )
         : argv_input( argv, argn, internal::make_argv_source( argn ) )
      {}
   };

   template< typename... Ts >
   argv_input( Ts&&... ) -> argv_input<>;

}  // namespace TAO_PEGTL_NAMESPACE

#endif