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// Copyright Catch2 Authors
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
// SPDX-License-Identifier: BSL-1.0
#ifndef CATCH_UNIQUE_PTR_HPP_INCLUDED
#define CATCH_UNIQUE_PTR_HPP_INCLUDED
#include <cassert>
#include <type_traits>
#include <catch2/internal/catch_move_and_forward.hpp>
namespace Catch {
namespace Detail {
/**
* A reimplementation of `std::unique_ptr` for improved compilation performance
*
* Does not support arrays nor custom deleters.
*/
template <typename T>
class unique_ptr {
T* m_ptr;
public:
constexpr unique_ptr(std::nullptr_t = nullptr):
m_ptr{}
{}
explicit constexpr unique_ptr(T* ptr):
m_ptr(ptr)
{}
template <typename U, typename = std::enable_if_t<std::is_base_of<T, U>::value>>
unique_ptr(unique_ptr<U>&& from):
m_ptr(from.release())
{}
template <typename U, typename = std::enable_if_t<std::is_base_of<T, U>::value>>
unique_ptr& operator=(unique_ptr<U>&& from) {
reset(from.release());
return *this;
}
unique_ptr(unique_ptr const&) = delete;
unique_ptr& operator=(unique_ptr const&) = delete;
unique_ptr(unique_ptr&& rhs) noexcept:
m_ptr(rhs.m_ptr) {
rhs.m_ptr = nullptr;
}
unique_ptr& operator=(unique_ptr&& rhs) noexcept {
reset(rhs.release());
return *this;
}
~unique_ptr() {
delete m_ptr;
}
T& operator*() {
assert(m_ptr);
return *m_ptr;
}
T const& operator*() const {
assert(m_ptr);
return *m_ptr;
}
T* operator->() noexcept {
assert(m_ptr);
return m_ptr;
}
T const* operator->() const noexcept {
assert(m_ptr);
return m_ptr;
}
T* get() { return m_ptr; }
T const* get() const { return m_ptr; }
void reset(T* ptr = nullptr) {
delete m_ptr;
m_ptr = ptr;
}
T* release() {
auto temp = m_ptr;
m_ptr = nullptr;
return temp;
}
explicit operator bool() const {
return m_ptr;
}
friend void swap(unique_ptr& lhs, unique_ptr& rhs) {
auto temp = lhs.m_ptr;
lhs.m_ptr = rhs.m_ptr;
rhs.m_ptr = temp;
}
};
//! Specialization to cause compile-time error for arrays
template <typename T>
class unique_ptr<T[]>;
template <typename T, typename... Args>
unique_ptr<T> make_unique(Args&&... args) {
return unique_ptr<T>(new T(CATCH_FORWARD(args)...));
}
} // end namespace Detail
} // end namespace Catch
#endif // CATCH_UNIQUE_PTR_HPP_INCLUDED
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