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// Copyright (c) 2017 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
#ifndef TAOCPP_PEGTL_INCLUDE_INTERNAL_APPLY0_HPP
#define TAOCPP_PEGTL_INCLUDE_INTERNAL_APPLY0_HPP
#include "../config.hpp"
#include "skip_control.hpp"
#include "trivial.hpp"
#include "../analysis/counted.hpp"
namespace tao
{
namespace TAOCPP_PEGTL_NAMESPACE
{
namespace internal
{
template< apply_mode A, typename... Actions >
struct apply0_impl;
template< typename... Actions >
struct apply0_impl< apply_mode::ACTION, Actions... >
{
template< typename... States >
static bool match( States&&... st )
{
#ifdef __cpp_fold_expressions
( Actions::apply0( st... ), ... );
#else
using swallow = bool[];
(void)swallow{ ( Actions::apply0( st... ), true )..., true };
#endif
return true;
}
};
template< typename... Actions >
struct apply0_impl< apply_mode::NOTHING, Actions... >
{
template< typename... States >
static bool match( States&&... )
{
return true;
}
};
template< typename... Actions >
struct apply0
{
using analyze_t = analysis::counted< analysis::rule_type::ANY, 0 >;
template< apply_mode A,
rewind_mode M,
template< typename... > class Action,
template< typename... > class Control,
typename Input,
typename... States >
static bool match( Input&, States&&... st )
{
return apply0_impl< A, Actions... >::match( st... );
}
};
template< typename... Actions >
struct skip_control< apply0< Actions... > > : std::true_type
{
};
} // namespace internal
} // namespace TAOCPP_PEGTL_NAMESPACE
} // namespace tao
#endif
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