clang/test/SemaCXX/coroutine-vla.cpp

   1 // RUN: %clang_cc1 %s -std=c++20 -fsyntax-only -Wno-vla-cxx-extension -verify
   2 #include "Inputs/std-coroutine.h"
   3
   4 struct promise;
   5
   6 struct coroutine : std::coroutine_handle<promise> {
   7   using promise_type = ::promise;
   8 };
   9
  10 struct promise
  11 {
  12     coroutine get_return_object();
  13     std::suspend_always initial_suspend() noexcept;
  14     std::suspend_always final_suspend() noexcept;
  15     void return_void();
  16     void unhandled_exception();
  17 };
  18
  19 // Test that we won't report the error incorrectly.
  20 void bar(int n) {
  21   int array[n];
  22   return;
  23 }
  24
  25 coroutine foo(int n) {
  26   int array[n]; // expected-error {{variable length arrays in a coroutine are not supported}}
  27   co_return;
  28 }
  29
  30 void lambda() {
  31   [](int n) -> coroutine {
  32     int array[n]; // expected-error {{variable length arrays in a coroutine are not supported}}
  33     co_return;
  34   }(10);
  35 }