1 // RUN: %clang_cc1 -fsyntax-only -Wunused-parameter -verify -std=c++20 %s 2 3 #include "Inputs/std-coroutine.h" 4 5 struct awaitable { 6 bool await_ready() noexcept; 7 void await_resume() noexcept; 8 void await_suspend(std::coroutine_handle<>) noexcept; 9 }; 10 11 struct task : awaitable { 12 struct promise_type { 13 task get_return_object() noexcept; 14 awaitable initial_suspend() noexcept; 15 awaitable final_suspend() noexcept; 16 void unhandled_exception() noexcept; 17 void return_void() noexcept; 18 }; 19 }; 20 foo(int a)21task foo(int a) { // expected-warning{{unused parameter 'a'}} 22 co_return; 23 } 24 bar(int a,int b)25task bar(int a, int b) { // expected-warning{{unused parameter 'b'}} 26 a = a + 1; 27 co_return; 28 } 29 create_closure()30void create_closure() { 31 auto closure = [](int c) -> task { // expected-warning{{unused parameter 'c'}} 32 co_return; 33 }; 34 } 35