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// Copyright 2017 Elias Kosunen
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
// This file is a part of scnlib:
// https://github.com/eliaskosunen/scnlib
#ifndef SCN_UTIL_META_H
#define SCN_UTIL_META_H
#include "../detail/fwd.h"
#include <type_traits>
namespace scn {
SCN_BEGIN_NAMESPACE
namespace detail {
template <typename... Ts>
struct make_void {
using type = void;
};
template <typename... Ts>
using void_t = typename make_void<Ts...>::type;
template <typename... T>
void valid_expr(T&&...);
template <typename T>
struct remove_cvref {
using type = typename std::remove_cv<
typename std::remove_reference<T>::type>::type;
};
template <typename T>
using remove_cvref_t = typename remove_cvref<T>::type;
// Stolen from range-v3
template <typename T>
struct static_const {
static constexpr T value{};
};
template <typename T>
constexpr T static_const<T>::value;
template <std::size_t I>
struct priority_tag : priority_tag<I - 1> {
};
template <>
struct priority_tag<0> {
};
struct dummy_type {
};
template <typename T>
struct dependent_false : std::false_type {
};
template <typename T>
using integer_type_for_char = typename std::
conditional<std::is_signed<T>::value, int, unsigned>::type;
} // namespace detail
SCN_END_NAMESPACE
} // namespace scn
#endif
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