59 lines · cpp
1// Verify that we synthesized the coroutine for a lambda inside of a function template.2// RUN: %clang_cc1 -std=c++20 -triple=x86_64-unknown-linux-gnu -emit-llvm -o - %s -fexceptions -fcxx-exceptions -disable-llvm-passes | FileCheck %s3 4namespace std {5template <typename R, typename... T> struct coroutine_traits {6 using promise_type = typename R::promise_type;7};8 9template <class Promise = void> struct coroutine_handle;10template <> struct coroutine_handle<void> {11 static coroutine_handle from_address(void *) noexcept;12 coroutine_handle() = default;13 template <class PromiseType>14 coroutine_handle(coroutine_handle<PromiseType>) noexcept;15};16template <class Promise> struct coroutine_handle : coroutine_handle<void> {17 coroutine_handle() = default;18 static coroutine_handle from_address(void *) noexcept;19};20} // namespace std21 22struct suspend_always {23 bool await_ready() noexcept;24 void await_suspend(std::coroutine_handle<>) noexcept;25 void await_resume() noexcept;26};27 28struct Task {29 struct promise_type {30 Task get_return_object();31 void return_void() {}32 suspend_always initial_suspend() noexcept;33 suspend_always final_suspend() noexcept;34 void unhandled_exception() noexcept;35 };36};37 38template <typename _AwrT> auto SyncAwait(_AwrT &&A) {39 if (!A.await_ready()) {40 auto AwaitAsync = [&]() -> Task {41 try { (void)(co_await A); } catch (...) {}42 };43 Task t = AwaitAsync();44 }45 return A.await_resume();46}47 48void f() {49 suspend_always test;50 SyncAwait(test);51}52 53// Verify that we synthesized the coroutine for a lambda inside SyncAwait54// CHECK-LABEL: define linkonce_odr void @_ZZ9SyncAwaitIR14suspend_alwaysEDaOT_ENKUlvE_clEv(55// CHECK: alloca %"struct.Task::promise_type"56// CHECK: call token @llvm.coro.id(57// CHECK: call i8 @llvm.coro.suspend(58// CHECK: call void @llvm.coro.end(59