[clang] [clang-tools-extra] [libcxx] [clang] Enable sized deallocation by default in C++14 onwards (PR #83774)

[Chuanqi Xu via cfe-commits]

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@@ -0,0 +1,44 @@
+//===------- SizedDellocation.h - Sized Deallocation ------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+///
+/// \file
+/// Defines a function that returns the minimum OS versions supporting
+/// C++14's sized deallocation functions.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_BASIC_SIZEDDEALLOCATION_H
+#define LLVM_CLANG_BASIC_SIZEDDEALLOCATION_H
+
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/VersionTuple.h"
+#include "llvm/TargetParser/Triple.h"
+
+namespace clang {
+inline llvm::VersionTuple sizedDeallocMinVersion(llvm::Triple::OSType OS) {
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ChuanqiXu9 wrote:

If I read correctly, this is only used in `Darwin.cpp`, so it would be better to inline the function there.

https://github.com/llvm/llvm-project/pull/83774