clang/lib/Headers/__stdarg_va_arg.h

   1 /*===---- __stdarg_va_arg.h - Definitions of va_start, va_arg, va_end-------===
   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 va_arg
  11
  12 #if defined(__STDC_VERSION__) && __STDC_VERSION__ >= 202311L
  13 /* C23 does not require the second parameter for va_start. */
  14 #define va_start(ap, ...) __builtin_va_start(ap, 0)
  15 #else
  16 /* Versions before C23 do require the second parameter. */
  17 #define va_start(ap, param) __builtin_va_start(ap, param)
  18 #endif
  19 #define va_end(ap) __builtin_va_end(ap)
  20 #define va_arg(ap, type) __builtin_va_arg(ap, type)
  21
  22 #endif