libcxx/test/std/language.support/support.runtime/csetjmp.pass.cpp

   1 //===----------------------------------------------------------------------===//
   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 // test <csetjmp>
  10
  11 #include <csetjmp>
  12 #include <cassert>
  13 #include <type_traits>
  14
  15 int main(int, char**) {
  16   std::jmp_buf jb;
  17
  18   switch (setjmp(jb)) {
  19   // First time we set the buffer, the function should return 0
  20   case 0:
  21     break;
  22
  23   // If it returned 42, then we're coming from the std::longjmp call below
  24   case 42:
  25     return 0;
  26
  27   // Otherwise, something is wrong
  28   default:
  29     return 1;
  30   }
  31
  32   std::longjmp(jb, 42);
  33   static_assert(std::is_same<decltype(std::longjmp(jb, 0)), void>::value, "");
  34
  35   return 1;
  36 }