common.h

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// Copyright 2024 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
#ifndef V8_BASE_TEMPLATE_META_PROGRAMMING_COMMON_H_
#define V8_BASE_TEMPLATE_META_PROGRAMMING_COMMON_H_
 
#include <type_traits>
 
#define TYPENAME1     \
  template <typename> \
  typename
 
namespace v8::base::tmp {
 
template <typename T, typename U>
struct equals : std::bool_constant<false> {};
template <typename T>
struct equals<T, T> : std::bool_constant<true> {};
 
template <TYPENAME1 T, TYPENAME1 U>
struct equals1 : std::bool_constant<false> {};
template <TYPENAME1 T>
struct equals1<T, T> : std::bool_constant<true> {};
 
template <TYPENAME1 T, typename U>
struct instantiate {
  using type = T<U>;
};
 
template <typename I, TYPENAME1 T>
struct is_instantiation_of : std::bool_constant<false> {};
template <typename U, TYPENAME1 T>
struct is_instantiation_of<T<U>, T> : std::bool_constant<true> {};
 
}  // namespace v8::base::tmp
 
#undef TYPENAME1
 
#endif  // V8_BASE_TEMPLATE_META_PROGRAMMING_COMMON_H_