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 #ifndef _NULLPTR_T 11 #define _NULLPTR_T 12 13 #ifdef __cplusplus 14 #if defined(_MSC_EXTENSIONS) && defined(_NATIVE_NULLPTR_SUPPORTED) 15 namespace std { 16 typedef decltype(nullptr) nullptr_t; 17 } 18 using ::std::nullptr_t; 19 #endif 20 #elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L 21 typedef typeof(nullptr) nullptr_t; 22 #endif 23 24 #endif 25