================ @@ -0,0 +1,155 @@ +========================= +C++ Type Aware Allocators +========================= + +.. contents:: + :local: + +Introduction +============ + +Clang includes an implementation of P2719 "Type-aware allocation and deallocation +functions". + +This is a feature that extends the semantics of `new`, `new[]`, `delete` and +`delete[]` operators to expose the type being allocated to the operator. This +can be used to customize allocation of types without needing to modify the +type declaration, or via template definitions fully generic type aware +allocators. + +P2719 introduces a type-identity tag as valid parameter type for all allocation +operators. This tag is a default initialized value of type `std::type_identity<T>` +where T is the type being allocated or deallocated. Unlike the other placement +arguments this tag is passed as the first parameter to the operator. + +The most basic use case is as follows + +.. code-block:: c++ + + #include <new> + #include <type_identity> ---------------- zwuis wrote:
`<type_traits>` https://github.com/llvm/llvm-project/pull/148576 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
