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 // MSVC warning C4611: interaction between '_setjmp' and C++ object destruction is non-portable
  10 // ADDITIONAL_COMPILE_FLAGS(cl-style-warnings): /wd4611
  11
  12 // test <csetjmp>
  13
  14 #include <csetjmp>
  15 #include <cassert>
  16 #include <type_traits>
  17
  18 int main(int, char**) {
  19   std::jmp_buf jb;
  20
  21   switch (setjmp(jb)) {
  22   // First time we set the buffer, the function should return 0
  23   case 0:
  24     break;
  25
  26   // If it returned 42, then we're coming from the std::longjmp call below
  27   case 42:
  28     return 0;
  29
  30   // Otherwise, something is wrong
  31   default:
  32     return 1;
  33   }
  34
  35   std::longjmp(jb, 42);
  36   static_assert(std::is_same<decltype(std::longjmp(jb, 0)), void>::value, "");
  37
  38   return 1;
  39 }