mirror of
https://github.com/carbon-language/carbon-lang.git
synced 2026-09-25 09:20:12 +01:00
44 lines
1.0 KiB
C++
44 lines
1.0 KiB
C++
// Part of the Carbon Language project, under the Apache License v2.0 with LLVM
|
|
// Exceptions. See /LICENSE for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
|
|
#ifndef EXECUTABLE_SEMANTICS_COMMON_PTR_H_
|
|
#define EXECUTABLE_SEMANTICS_COMMON_PTR_H_
|
|
|
|
#include <memory>
|
|
#include <vector>
|
|
|
|
#include "common/check.h"
|
|
|
|
namespace Carbon {
|
|
|
|
// A non-nullable pointer. Written as `Ptr<T>` instead of `T*`.
|
|
template <typename T>
|
|
class Ptr {
|
|
public:
|
|
explicit Ptr(T* ptr) : ptr(ptr) { CHECK(ptr != nullptr); }
|
|
|
|
template <typename OtherT,
|
|
std::enable_if_t<std::is_convertible_v<OtherT*, T*>>* = nullptr>
|
|
Ptr(Ptr<OtherT> other) {
|
|
return Ptr<OtherT>(other.ptr);
|
|
}
|
|
|
|
Ptr(std::nullptr_t) = delete;
|
|
|
|
Ptr(const Ptr& other) = default;
|
|
Ptr& operator=(const Ptr& rhs) = default;
|
|
|
|
auto operator*() const -> T& { return *ptr; }
|
|
auto operator->() const -> T* { return ptr; }
|
|
|
|
T* Get() const { return ptr; }
|
|
|
|
private:
|
|
T* ptr;
|
|
};
|
|
|
|
} // namespace Carbon
|
|
|
|
#endif // EXECUTABLE_SEMANTICS_COMMON_PTR_H_
|