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Contents
// Copyright (c) 2018-2020 Dr. Colin Hirsch and Daniel Frey
// Please see LICENSE for license or visit https://github.com/taocpp/PEGTL/
#ifndef TAO_JSON_PEGTL_CONTRIB_IF_THEN_HPP
#define TAO_JSON_PEGTL_CONTRIB_IF_THEN_HPP
#include <type_traits>
#include "../config.hpp"
#include "../internal/if_then_else.hpp"
#include "../internal/seq.hpp"
#include "../internal/skip_control.hpp"
#include "../internal/trivial.hpp"
namespace TAO_JSON_PEGTL_NAMESPACE
{
namespace internal
{
template< typename Cond, typename Then >
struct if_pair
{
};
template< typename... Pairs >
struct if_then;
template< typename Cond, typename Then, typename... Pairs >
struct if_then< if_pair< Cond, Then >, Pairs... >
: if_then_else< Cond, Then, if_then< Pairs... > >
{
template< typename ElseCond, typename... Thens >
using else_if_then = if_then< if_pair< Cond, Then >, Pairs..., if_pair< ElseCond, seq< Thens... > > >;
template< typename... Thens >
using else_then = if_then_else< Cond, Then, if_then< Pairs..., if_pair< trivial< true >, seq< Thens... > > > >;
};
template<>
struct if_then<>
: trivial< false >
{
};
template< typename... Pairs >
inline constexpr bool skip_control< if_then< Pairs... > > = true;
} // namespace internal
template< typename Cond, typename... Thens >
using if_then = internal::if_then< internal::if_pair< Cond, internal::seq< Thens... > > >;
} // namespace TAO_JSON_PEGTL_NAMESPACE
#endif
Version data entries
24 entries across 24 versions & 1 rubygems