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// Copyright (c) 2019-2020 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
#ifndef TAO_JSON_PEGTL_CONTRIB_REMOVE_FIRST_STATE_HPP
#define TAO_JSON_PEGTL_CONTRIB_REMOVE_FIRST_STATE_HPP
#include <type_traits>
#include "../config.hpp"
#include "../internal/has_unwind.hpp"
namespace TAO_JSON_PEGTL_NAMESPACE
{
// Applies to start(), success(), failure(), raise(), apply(), and apply0():
// The first state is removed when the call is forwarded to Base.
template< typename Base >
struct remove_first_state
: Base
{
template< typename ParseInput, typename State, typename... States >
static void start( const ParseInput& in, State&& /*unused*/, States&&... st ) noexcept( noexcept( Base::start( in, st... ) ) )
{
Base::start( in, st... );
}
template< typename ParseInput, typename State, typename... States >
static void success( const ParseInput& in, State&& /*unused*/, States&&... st ) noexcept( noexcept( Base::success( in, st... ) ) )
{
Base::success( in, st... );
}
template< typename ParseInput, typename State, typename... States >
static void failure( const ParseInput& in, State&& /*unused*/, States&&... st ) noexcept( noexcept( Base::failure( in, st... ) ) )
{
Base::failure( in, st... );
}
template< typename ParseInput, typename State, typename... States >
[[noreturn]] static void raise( const ParseInput& in, State&& /*unused*/, States&&... st )
{
Base::raise( in, st... );
}
template< typename ParseInput, typename State, typename... States >
static auto unwind( const ParseInput& in, State&& /*unused*/, States&&... st )
-> std::enable_if_t< internal::has_unwind< Base, void, const ParseInput&, States... > >
{
Base::unwind( in, st... );
}
template< template< typename... > class Action, typename Iterator, typename ParseInput, typename State, typename... States >
static auto apply( const Iterator& begin, const ParseInput& in, State&& /*unused*/, States&&... st ) noexcept( noexcept( Base::template apply< Action >( begin, in, st... ) ) )
-> decltype( Base::template apply< Action >( begin, in, st... ) )
{
return Base::template apply< Action >( begin, in, st... );
}
template< template< typename... > class Action, typename ParseInput, typename State, typename... States >
static auto apply0( const ParseInput& in, State&& /*unused*/, States&&... st ) noexcept( noexcept( Base::template apply0< Action >( in, st... ) ) )
-> decltype( Base::template apply0< Action >( in, st... ) )
{
return Base::template apply0< Action >( in, st... );
}
};
} // namespace TAO_JSON_PEGTL_NAMESPACE
#endif
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