1 /*===---- __stddef_nullptr_t.h - Definition of nullptr_t -------------------=== 2 * 3 * Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 * See https://llvm.org/LICENSE.txt for license information. 5 * SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 * 7 *===-----------------------------------------------------------------------=== 8 */ 9 10 /* 11 * When -fbuiltin-headers-in-system-modules is set this is a non-modular header 12 * and needs to behave as if it was textual. 13 */ 14 #if !defined(_NULLPTR_T) || \ 15 (__has_feature(modules) && !__building_module(_Builtin_stddef)) 16 #define _NULLPTR_T 17 18 #ifdef __cplusplus 19 #if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED) 20 namespace std { 21 typedef decltype(nullptr) nullptr_t; 22 } 23 using ::std::nullptr_t; 24 #endif 25 #elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L 26 typedef typeof(nullptr) nullptr_t; 27 #endif 28 29 #endif 30