forked from OSchip/llvm-project
908 lines
32 KiB
C++
908 lines
32 KiB
C++
// RUN: %clang_cc1 -std=c++14 -fcoroutines-ts -verify %s -fcxx-exceptions -fexceptions
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void no_coroutine_traits_bad_arg_await() {
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co_await a; // expected-error {{include <experimental/coroutine>}}
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// expected-error@-1 {{use of undeclared identifier 'a'}}
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}
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void no_coroutine_traits_bad_arg_yield() {
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co_yield a; // expected-error {{include <experimental/coroutine>}}
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// expected-error@-1 {{use of undeclared identifier 'a'}}
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}
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void no_coroutine_traits_bad_arg_return() {
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co_return a; // expected-error {{include <experimental/coroutine>}}
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// expected-error@-1 {{use of undeclared identifier 'a'}}
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}
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void no_coroutine_traits() {
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co_await 4; // expected-error {{std::experimental::coroutine_traits type was not found; include <experimental/coroutine>}}
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}
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namespace std {
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namespace experimental {
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template <typename... T>
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struct coroutine_traits; // expected-note {{declared here}}
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}} // namespace std::experimental
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template<typename Promise> struct coro {};
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template <typename Promise, typename... Ps>
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struct std::experimental::coroutine_traits<coro<Promise>, Ps...> {
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using promise_type = Promise;
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};
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struct awaitable {
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bool await_ready();
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template <typename F> void await_suspend(F);
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void await_resume();
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} a;
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struct suspend_always {
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bool await_ready() { return false; }
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template <typename F> void await_suspend(F);
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void await_resume() {}
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};
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struct suspend_never {
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bool await_ready() { return true; }
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template <typename F> void await_suspend(F);
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void await_resume() {}
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};
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void no_specialization() {
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co_await a; // expected-error {{implicit instantiation of undefined template 'std::experimental::coroutine_traits<void>'}}
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}
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template <typename... T>
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struct std::experimental::coroutine_traits<int, T...> {};
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int no_promise_type() { // expected-error {{this function cannot be a coroutine: 'std::experimental::coroutine_traits<int>' has no member named 'promise_type'}}
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co_await a;
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}
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template <>
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struct std::experimental::coroutine_traits<double, double> { typedef int promise_type; };
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double bad_promise_type(double) { // expected-error {{this function cannot be a coroutine: 'experimental::coroutine_traits<double, double>::promise_type' (aka 'int') is not a class}}
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co_await a;
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}
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template <>
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struct std::experimental::coroutine_traits<double, int> {
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struct promise_type {};
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};
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double bad_promise_type_2(int) { // expected-error {{no member named 'initial_suspend'}}
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co_yield 0; // expected-error {{no member named 'yield_value' in 'std::experimental::coroutine_traits<double, int>::promise_type'}}
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}
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struct promise; // expected-note {{forward declaration}}
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struct promise_void;
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struct void_tag {};
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template <typename... T>
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struct std::experimental::coroutine_traits<void, T...> { using promise_type = promise; };
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template <typename... T>
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struct std::experimental::coroutine_traits<void, void_tag, T...>
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{ using promise_type = promise_void; };
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// FIXME: This diagnostic is terrible.
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void undefined_promise() { // expected-error {{this function cannot be a coroutine: 'experimental::coroutine_traits<void>::promise_type' (aka 'promise') is an incomplete type}}
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co_await a;
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}
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struct yielded_thing { const char *p; short a, b; };
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struct not_awaitable {};
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struct promise {
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void get_return_object();
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suspend_always initial_suspend();
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suspend_always final_suspend();
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awaitable yield_value(int); // expected-note 2{{candidate}}
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awaitable yield_value(yielded_thing); // expected-note 2{{candidate}}
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not_awaitable yield_value(void()); // expected-note 2{{candidate}}
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void return_value(int); // expected-note 2{{here}}
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void unhandled_exception();
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};
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struct promise_void {
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void get_return_object();
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suspend_always initial_suspend();
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suspend_always final_suspend();
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void return_void();
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void unhandled_exception();
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};
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void no_coroutine_handle() { // expected-error {{std::experimental::coroutine_handle type was not found; include <experimental/coroutine> before defining a coroutine}}
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//expected-note@-1 {{call to 'initial_suspend' implicitly required by the initial suspend point}}
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co_return 5; //expected-note {{function is a coroutine due to use of 'co_return' here}}
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}
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namespace std {
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namespace experimental {
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template <class PromiseType = void>
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struct coroutine_handle {
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static coroutine_handle from_address(void *);
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};
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template <>
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struct coroutine_handle<void> {
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template <class PromiseType>
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coroutine_handle(coroutine_handle<PromiseType>);
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static coroutine_handle from_address(void *);
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};
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}} // namespace std::experimental
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void yield() {
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co_yield 0;
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co_yield {"foo", 1, 2};
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co_yield {1e100}; // expected-error {{cannot be narrowed}} expected-note {{explicit cast}} expected-warning {{changes value}} expected-warning {{braces around scalar}}
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co_yield {"foo", __LONG_LONG_MAX__}; // expected-error {{cannot be narrowed}} expected-note {{explicit cast}} expected-warning {{changes value}}
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co_yield {"foo"};
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co_yield "foo"; // expected-error {{no matching}}
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co_yield 1.0;
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co_yield yield; // expected-error {{no member named 'await_ready' in 'not_awaitable'}}
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}
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void coreturn(int n) {
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co_await a;
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if (n == 0)
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co_return 3;
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if (n == 1)
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co_return {4}; // expected-warning {{braces around scalar initializer}}
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if (n == 2)
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co_return "foo"; // expected-error {{cannot initialize a parameter of type 'int' with an lvalue of type 'const char [4]'}}
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co_return 42;
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}
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template <class T>
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void co_await_non_dependent_arg(T) {
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co_await a;
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}
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template void co_await_non_dependent_arg(int);
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void mixed_yield() {
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co_yield 0; // expected-note {{use of 'co_yield'}}
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return; // expected-error {{not allowed in coroutine}}
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}
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void mixed_yield_invalid() {
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co_yield blah; // expected-error {{use of undeclared identifier}}
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// expected-note@-1 {{function is a coroutine due to use of 'co_yield'}}
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return; // expected-error {{return statement not allowed in coroutine}}
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}
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template <class T>
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void mixed_yield_template(T) {
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co_yield blah; // expected-error {{use of undeclared identifier}}
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// expected-note@-1 {{function is a coroutine due to use of 'co_yield'}}
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return; // expected-error {{return statement not allowed in coroutine}}
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}
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template <class T>
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void mixed_yield_template2(T) {
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co_yield 42;
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// expected-note@-1 {{function is a coroutine due to use of 'co_yield'}}
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return; // expected-error {{return statement not allowed in coroutine}}
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}
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template <class T>
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void mixed_yield_template3(T v) {
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co_yield blah(v);
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// expected-note@-1 {{function is a coroutine due to use of 'co_yield'}}
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return; // expected-error {{return statement not allowed in coroutine}}
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}
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void mixed_await() {
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co_await a; // expected-note {{use of 'co_await'}}
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return; // expected-error {{not allowed in coroutine}}
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}
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void mixed_await_invalid() {
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co_await 42; // expected-error {{'int' is not a structure or union}}
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// expected-note@-1 {{function is a coroutine due to use of 'co_await'}}
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return; // expected-error {{not allowed in coroutine}}
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}
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template <class T>
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void mixed_await_template(T) {
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co_await 42;
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// expected-note@-1 {{function is a coroutine due to use of 'co_await'}}
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return; // expected-error {{not allowed in coroutine}}
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}
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template <class T>
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void mixed_await_template2(T v) {
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co_await v; // expected-error {{'long' is not a structure or union}}
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// expected-note@-1 {{function is a coroutine due to use of 'co_await'}}
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return; // expected-error {{not allowed in coroutine}}
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}
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template void mixed_await_template2(long); // expected-note {{requested here}}
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void only_coreturn(void_tag) {
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co_return; // OK
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}
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void mixed_coreturn(void_tag, bool b) {
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if (b)
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co_return; // expected-note {{use of 'co_return'}}
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else
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return; // expected-error {{not allowed in coroutine}}
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}
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void mixed_coreturn_invalid(bool b) {
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if (b)
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co_return; // expected-note {{use of 'co_return'}}
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// expected-error@-1 {{no member named 'return_void' in 'promise'}}
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else
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return; // expected-error {{not allowed in coroutine}}
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}
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template <class T>
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void mixed_coreturn_template(void_tag, bool b, T v) {
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if (b)
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co_return v; // expected-note {{use of 'co_return'}}
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// expected-error@-1 {{no member named 'return_value' in 'promise_void'}}
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else
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return; // expected-error {{not allowed in coroutine}}
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}
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template void mixed_coreturn_template(void_tag, bool, int); // expected-note {{requested here}}
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template <class T>
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void mixed_coreturn_template2(bool b, T) {
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if (b)
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co_return v; // expected-note {{use of 'co_return'}}
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// expected-error@-1 {{use of undeclared identifier 'v'}}
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else
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return; // expected-error {{not allowed in coroutine}}
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}
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struct CtorDtor {
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CtorDtor() {
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co_yield 0; // expected-error {{'co_yield' cannot be used in a constructor}}
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}
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CtorDtor(awaitable a) {
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// The spec doesn't say this is ill-formed, but it must be.
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co_await a; // expected-error {{'co_await' cannot be used in a constructor}}
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}
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~CtorDtor() {
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co_return 0; // expected-error {{'co_return' cannot be used in a destructor}}
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}
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// FIXME: The spec says this is ill-formed.
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void operator=(CtorDtor&) {
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co_yield 0; // expected-error {{'co_yield' cannot be used in a copy assignment operator}}
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}
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void operator=(CtorDtor const &) {
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co_yield 0; // expected-error {{'co_yield' cannot be used in a copy assignment operator}}
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}
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void operator=(CtorDtor &&) {
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co_await a; // expected-error {{'co_await' cannot be used in a move assignment operator}}
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}
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void operator=(CtorDtor const &&) {
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co_await a; // expected-error {{'co_await' cannot be used in a move assignment operator}}
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}
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void operator=(int) {
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co_await a; // OK. Not a special member
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}
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};
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void unevaluated() {
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decltype(co_await a); // expected-error {{cannot be used in an unevaluated context}}
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sizeof(co_await a); // expected-error {{cannot be used in an unevaluated context}}
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typeid(co_await a); // expected-error {{cannot be used in an unevaluated context}}
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decltype(co_yield a); // expected-error {{cannot be used in an unevaluated context}}
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sizeof(co_yield a); // expected-error {{cannot be used in an unevaluated context}}
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typeid(co_yield a); // expected-error {{cannot be used in an unevaluated context}}
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}
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constexpr auto constexpr_deduced_return_coroutine() {
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co_yield 0; // expected-error {{'co_yield' cannot be used in a constexpr function}}
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// expected-error@-1 {{'co_yield' cannot be used in a function with a deduced return type}}
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}
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void varargs_coroutine(const char *, ...) {
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co_await a; // expected-error {{'co_await' cannot be used in a varargs function}}
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}
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auto deduced_return_coroutine() {
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co_await a; // expected-error {{'co_await' cannot be used in a function with a deduced return type}}
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}
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struct outer {};
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struct await_arg_1 {};
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struct await_arg_2 {};
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namespace adl_ns {
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struct coawait_arg_type {};
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awaitable operator co_await(coawait_arg_type);
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}
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namespace dependent_operator_co_await_lookup {
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template<typename T> void await_template(T t) {
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// no unqualified lookup results
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co_await t; // expected-error {{no member named 'await_ready' in 'dependent_operator_co_await_lookup::not_awaitable'}}
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// expected-error@-1 {{call to function 'operator co_await' that is neither visible in the template definition nor found by argument-dependent lookup}}
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};
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template void await_template(awaitable);
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struct indirectly_awaitable { indirectly_awaitable(outer); };
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awaitable operator co_await(indirectly_awaitable); // expected-note {{should be declared prior to}}
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template void await_template(indirectly_awaitable);
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struct not_awaitable {};
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template void await_template(not_awaitable); // expected-note {{instantiation}}
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template<typename T> void await_template_2(T t) {
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// one unqualified lookup result
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co_await t;
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};
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template void await_template(outer); // expected-note {{instantiation}}
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template void await_template_2(outer);
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struct transform_awaitable {};
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struct transformed {};
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struct transform_promise {
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typedef transform_awaitable await_arg;
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coro<transform_promise> get_return_object();
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transformed initial_suspend();
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::adl_ns::coawait_arg_type final_suspend();
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transformed await_transform(transform_awaitable);
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void unhandled_exception();
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void return_void();
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};
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template <class AwaitArg>
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struct basic_promise {
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typedef AwaitArg await_arg;
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coro<basic_promise> get_return_object();
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awaitable initial_suspend();
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awaitable final_suspend();
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void unhandled_exception();
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void return_void();
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};
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awaitable operator co_await(await_arg_1);
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template <typename T, typename U>
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coro<T> await_template_3(U t) {
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co_await t;
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}
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template coro<basic_promise<await_arg_1>> await_template_3<basic_promise<await_arg_1>>(await_arg_1);
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template <class T, int I = 0>
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struct dependent_member {
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coro<T> mem_fn() const {
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co_await typename T::await_arg{}; // expected-error {{call to function 'operator co_await'}}}
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}
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template <class U>
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coro<T> dep_mem_fn(U t) {
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co_await t;
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}
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};
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template <>
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struct dependent_member<long> {
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// FIXME this diagnostic is terrible
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coro<transform_promise> mem_fn() const { // expected-error {{no member named 'await_ready' in 'dependent_operator_co_await_lookup::transformed'}}
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// expected-note@-1 {{call to 'initial_suspend' implicitly required by the initial suspend point}}
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// expected-note@+1 {{function is a coroutine due to use of 'co_await' here}}
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co_await transform_awaitable{};
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// expected-error@-1 {{no member named 'await_ready'}}
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}
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template <class R, class U>
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coro<R> dep_mem_fn(U u) { co_await u; }
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};
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awaitable operator co_await(await_arg_2); // expected-note {{'operator co_await' should be declared prior to the call site}}
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template struct dependent_member<basic_promise<await_arg_1>, 0>;
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template struct dependent_member<basic_promise<await_arg_2>, 0>; // expected-note {{in instantiation}}
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template <>
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coro<transform_promise>
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// FIXME this diagnostic is terrible
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dependent_member<long>::dep_mem_fn<transform_promise>(int) { // expected-error {{no member named 'await_ready' in 'dependent_operator_co_await_lookup::transformed'}}
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//expected-note@-1 {{call to 'initial_suspend' implicitly required by the initial suspend point}}
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//expected-note@+1 {{function is a coroutine due to use of 'co_await' here}}
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co_await transform_awaitable{};
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// expected-error@-1 {{no member named 'await_ready'}}
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}
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void operator co_await(transform_awaitable) = delete;
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awaitable operator co_await(transformed);
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template coro<transform_promise>
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dependent_member<long>::dep_mem_fn<transform_promise>(transform_awaitable);
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template <>
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coro<transform_promise> dependent_member<long>::dep_mem_fn<transform_promise>(long) {
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co_await transform_awaitable{};
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}
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template <>
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struct dependent_member<int> {
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coro<transform_promise> mem_fn() const {
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co_await transform_awaitable{};
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}
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};
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template coro<transform_promise> await_template_3<transform_promise>(transform_awaitable);
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template struct dependent_member<transform_promise>;
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template coro<transform_promise> dependent_member<transform_promise>::dep_mem_fn(transform_awaitable);
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}
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struct yield_fn_tag {};
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template <>
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struct std::experimental::coroutine_traits<void, yield_fn_tag> {
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struct promise_type {
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// FIXME: add an await_transform overload for functions
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awaitable yield_value(int());
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void return_value(int());
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suspend_never initial_suspend();
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suspend_never final_suspend();
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void get_return_object();
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void unhandled_exception();
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};
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};
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namespace placeholder {
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awaitable f(), f(int); // expected-note 4{{possible target}}
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int g(), g(int); // expected-note 2{{candidate}}
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void x() {
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co_await f; // expected-error {{reference to overloaded function}}
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}
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void y() {
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co_yield g; // expected-error {{no matching member function for call to 'yield_value'}}
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}
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void z() {
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co_await a;
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co_return g; // expected-error {{address of overloaded function 'g' does not match required type 'int'}}
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}
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void x(yield_fn_tag) {
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co_await f; // expected-error {{reference to overloaded function}}
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}
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void y(yield_fn_tag) {
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co_yield g;
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}
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void z(yield_fn_tag) {
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co_await a;
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co_return g;
|
|
}
|
|
}
|
|
|
|
struct bad_promise_1 {
|
|
suspend_always initial_suspend();
|
|
suspend_always final_suspend();
|
|
void unhandled_exception();
|
|
void return_void();
|
|
};
|
|
coro<bad_promise_1> missing_get_return_object() { // expected-error {{no member named 'get_return_object' in 'bad_promise_1'}}
|
|
co_await a;
|
|
}
|
|
|
|
struct bad_promise_2 {
|
|
coro<bad_promise_2> get_return_object();
|
|
// FIXME: We shouldn't offer a typo-correction here!
|
|
suspend_always final_suspend(); // expected-note {{here}}
|
|
void unhandled_exception();
|
|
void return_void();
|
|
};
|
|
// FIXME: This shouldn't happen twice
|
|
coro<bad_promise_2> missing_initial_suspend() { // expected-error {{no member named 'initial_suspend' in 'bad_promise_2'}}
|
|
co_await a;
|
|
}
|
|
|
|
struct bad_promise_3 {
|
|
coro<bad_promise_3> get_return_object();
|
|
// FIXME: We shouldn't offer a typo-correction here!
|
|
suspend_always initial_suspend(); // expected-note {{here}}
|
|
void unhandled_exception();
|
|
void return_void();
|
|
};
|
|
coro<bad_promise_3> missing_final_suspend() { // expected-error {{no member named 'final_suspend' in 'bad_promise_3'}}
|
|
co_await a;
|
|
}
|
|
|
|
struct bad_promise_4 {
|
|
coro<bad_promise_4> get_return_object();
|
|
not_awaitable initial_suspend();
|
|
suspend_always final_suspend();
|
|
void return_void();
|
|
};
|
|
// FIXME: This diagnostic is terrible.
|
|
coro<bad_promise_4> bad_initial_suspend() { // expected-error {{no member named 'await_ready' in 'not_awaitable'}}
|
|
// expected-note@-1 {{call to 'initial_suspend' implicitly required by the initial suspend point}}
|
|
co_await a; // expected-note {{function is a coroutine due to use of 'co_await' here}}
|
|
}
|
|
|
|
struct bad_promise_5 {
|
|
coro<bad_promise_5> get_return_object();
|
|
suspend_always initial_suspend();
|
|
not_awaitable final_suspend();
|
|
void return_void();
|
|
};
|
|
// FIXME: This diagnostic is terrible.
|
|
coro<bad_promise_5> bad_final_suspend() { // expected-error {{no member named 'await_ready' in 'not_awaitable'}}
|
|
// expected-note@-1 {{call to 'final_suspend' implicitly required by the final suspend point}}
|
|
co_await a; // expected-note {{function is a coroutine due to use of 'co_await' here}}
|
|
}
|
|
|
|
struct bad_promise_6 {
|
|
coro<bad_promise_6> get_return_object();
|
|
suspend_always initial_suspend();
|
|
suspend_always final_suspend();
|
|
void unhandled_exception();
|
|
void return_void(); // expected-note 2 {{member 'return_void' first declared here}}
|
|
void return_value(int) const; // expected-note 2 {{member 'return_value' first declared here}}
|
|
void return_value(int);
|
|
};
|
|
coro<bad_promise_6> bad_implicit_return() { // expected-error {{'bad_promise_6' declares both 'return_value' and 'return_void'}}
|
|
co_await a;
|
|
}
|
|
|
|
template <class T>
|
|
coro<T> bad_implicit_return_dependent(T) { // expected-error {{'bad_promise_6' declares both 'return_value' and 'return_void'}}
|
|
co_await a;
|
|
}
|
|
template coro<bad_promise_6> bad_implicit_return_dependent(bad_promise_6); // expected-note {{in instantiation}}
|
|
|
|
struct bad_promise_7 { // expected-note 2 {{defined here}}
|
|
coro<bad_promise_7> get_return_object();
|
|
suspend_always initial_suspend();
|
|
suspend_always final_suspend();
|
|
void return_void();
|
|
};
|
|
coro<bad_promise_7> no_unhandled_exception() { // expected-error {{'bad_promise_7' is required to declare the member 'unhandled_exception()'}}
|
|
co_await a;
|
|
}
|
|
|
|
template <class T>
|
|
coro<T> no_unhandled_exception_dependent(T) { // expected-error {{'bad_promise_7' is required to declare the member 'unhandled_exception()'}}
|
|
co_await a;
|
|
}
|
|
template coro<bad_promise_7> no_unhandled_exception_dependent(bad_promise_7); // expected-note {{in instantiation}}
|
|
|
|
struct bad_promise_base {
|
|
private:
|
|
void return_void();
|
|
};
|
|
struct bad_promise_8 : bad_promise_base {
|
|
coro<bad_promise_8> get_return_object();
|
|
suspend_always initial_suspend();
|
|
suspend_always final_suspend();
|
|
void unhandled_exception() __attribute__((unavailable)); // expected-note 2 {{made unavailable}}
|
|
void unhandled_exception() const; // expected-note 2 {{candidate}}
|
|
void unhandled_exception(void *) const; // expected-note 2 {{requires 1 argument, but 0 were provided}}
|
|
};
|
|
coro<bad_promise_8> calls_unhandled_exception() {
|
|
// expected-error@-1 {{call to unavailable member function 'unhandled_exception'}}
|
|
// FIXME: also warn about private 'return_void' here. Even though building
|
|
// the call to unhandled_exception has already failed.
|
|
co_await a;
|
|
}
|
|
|
|
template <class T>
|
|
coro<T> calls_unhandled_exception_dependent(T) {
|
|
// expected-error@-1 {{call to unavailable member function 'unhandled_exception'}}
|
|
co_await a;
|
|
}
|
|
template coro<bad_promise_8> calls_unhandled_exception_dependent(bad_promise_8); // expected-note {{in instantiation}}
|
|
|
|
struct bad_promise_9 {
|
|
coro<bad_promise_9> get_return_object();
|
|
suspend_always initial_suspend();
|
|
suspend_always final_suspend();
|
|
void await_transform(void *); // expected-note {{candidate}}
|
|
awaitable await_transform(int) __attribute__((unavailable)); // expected-note {{explicitly made unavailable}}
|
|
void return_void();
|
|
void unhandled_exception();
|
|
};
|
|
coro<bad_promise_9> calls_await_transform() {
|
|
co_await 42; // expected-error {{call to unavailable member function 'await_transform'}}
|
|
// expected-note@-1 {{call to 'await_transform' implicitly required by 'co_await' here}}
|
|
}
|
|
|
|
struct bad_promise_10 {
|
|
coro<bad_promise_10> get_return_object();
|
|
suspend_always initial_suspend();
|
|
suspend_always final_suspend();
|
|
int await_transform;
|
|
void return_void();
|
|
void unhandled_exception();
|
|
};
|
|
coro<bad_promise_10> bad_coawait() {
|
|
// FIXME this diagnostic is terrible
|
|
co_await 42; // expected-error {{called object type 'int' is not a function or function pointer}}
|
|
// expected-note@-1 {{call to 'await_transform' implicitly required by 'co_await' here}}
|
|
}
|
|
|
|
struct call_operator {
|
|
template <class... Args>
|
|
awaitable operator()(Args...) const { return a; }
|
|
};
|
|
void ret_void();
|
|
struct good_promise_1 {
|
|
coro<good_promise_1> get_return_object();
|
|
suspend_always initial_suspend();
|
|
suspend_always final_suspend();
|
|
void unhandled_exception();
|
|
static const call_operator await_transform;
|
|
using Fn = void (*)();
|
|
Fn return_void = ret_void;
|
|
};
|
|
const call_operator good_promise_1::await_transform;
|
|
coro<good_promise_1> ok_static_coawait() {
|
|
// FIXME this diagnostic is terrible
|
|
co_await 42;
|
|
}
|
|
|
|
template<> struct std::experimental::coroutine_traits<int, int, const char**>
|
|
{ using promise_type = promise; };
|
|
|
|
int main(int, const char**) {
|
|
co_await a; // expected-error {{'co_await' cannot be used in the 'main' function}}
|
|
}
|
|
|
|
struct good_promise_2 {
|
|
float get_return_object();
|
|
suspend_always initial_suspend();
|
|
suspend_always final_suspend();
|
|
void return_void();
|
|
void unhandled_exception();
|
|
};
|
|
template<> struct std::experimental::coroutine_handle<good_promise_2> {};
|
|
|
|
template<> struct std::experimental::coroutine_traits<float>
|
|
{ using promise_type = good_promise_2; };
|
|
|
|
float badly_specialized_coro_handle() { // expected-error {{std::experimental::coroutine_handle missing a member named 'from_address'}}
|
|
//expected-note@-1 {{call to 'initial_suspend' implicitly required by the initial suspend point}}
|
|
co_return; //expected-note {{function is a coroutine due to use of 'co_return' here}}
|
|
}
|
|
|
|
namespace std {
|
|
struct nothrow_t {};
|
|
constexpr nothrow_t nothrow = {};
|
|
}
|
|
|
|
using SizeT = decltype(sizeof(int));
|
|
|
|
void* operator new(SizeT __sz, const std::nothrow_t&) noexcept;
|
|
void operator delete(void* __p, const std::nothrow_t&) noexcept;
|
|
|
|
|
|
|
|
struct promise_on_alloc_failure_tag {};
|
|
|
|
template<>
|
|
struct std::experimental::coroutine_traits<int, promise_on_alloc_failure_tag> {
|
|
struct promise_type {
|
|
int get_return_object() {}
|
|
suspend_always initial_suspend() { return {}; }
|
|
suspend_always final_suspend() { return {}; }
|
|
void return_void() {}
|
|
int get_return_object_on_allocation_failure(); // expected-error{{'promise_type': 'get_return_object_on_allocation_failure()' must be a static member function}}
|
|
void unhandled_exception();
|
|
};
|
|
};
|
|
|
|
extern "C" int f(promise_on_alloc_failure_tag) {
|
|
co_return; //expected-note {{function is a coroutine due to use of 'co_return' here}}
|
|
}
|
|
|
|
struct bad_promise_11 {
|
|
coro<bad_promise_11> get_return_object();
|
|
suspend_always initial_suspend();
|
|
suspend_always final_suspend();
|
|
void unhandled_exception();
|
|
void return_void();
|
|
|
|
private:
|
|
static coro<bad_promise_11> get_return_object_on_allocation_failure(); // expected-note 2 {{declared private here}}
|
|
};
|
|
coro<bad_promise_11> private_alloc_failure_handler() {
|
|
// expected-error@-1 {{'get_return_object_on_allocation_failure' is a private member of 'bad_promise_11'}}
|
|
co_return; // FIXME: Add a "declared coroutine here" note.
|
|
}
|
|
|
|
template <class T>
|
|
coro<T> dependent_private_alloc_failure_handler(T) {
|
|
// expected-error@-1 {{'get_return_object_on_allocation_failure' is a private member of 'bad_promise_11'}}
|
|
co_return; // FIXME: Add a "declared coroutine here" note.
|
|
}
|
|
template coro<bad_promise_11> dependent_private_alloc_failure_handler(bad_promise_11);
|
|
// expected-note@-1 {{requested here}}
|
|
|
|
struct bad_promise_12 {
|
|
coro<bad_promise_12> get_return_object();
|
|
suspend_always initial_suspend();
|
|
suspend_always final_suspend();
|
|
void unhandled_exception();
|
|
void return_void();
|
|
static coro<bad_promise_12> get_return_object_on_allocation_failure();
|
|
|
|
static void* operator new(SizeT);
|
|
// expected-error@-1 2 {{'operator new' is required to have a non-throwing noexcept specification when the promise type declares 'get_return_object_on_allocation_failure()'}}
|
|
};
|
|
coro<bad_promise_12> throwing_in_class_new() { // expected-note {{call to 'operator new' implicitly required by coroutine function here}}
|
|
co_return;
|
|
}
|
|
|
|
template <class T>
|
|
coro<T> dependent_throwing_in_class_new(T) { // expected-note {{call to 'operator new' implicitly required by coroutine function here}}
|
|
co_return;
|
|
}
|
|
template coro<bad_promise_12> dependent_throwing_in_class_new(bad_promise_12); // expected-note {{requested here}}
|
|
|
|
|
|
struct good_promise_13 {
|
|
coro<good_promise_13> get_return_object();
|
|
suspend_always initial_suspend();
|
|
suspend_always final_suspend();
|
|
void unhandled_exception();
|
|
void return_void();
|
|
static coro<good_promise_13> get_return_object_on_allocation_failure();
|
|
};
|
|
coro<good_promise_13> uses_nothrow_new() {
|
|
co_return;
|
|
}
|
|
|
|
template <class T>
|
|
coro<T> dependent_uses_nothrow_new(T) {
|
|
co_return;
|
|
}
|
|
template coro<good_promise_13> dependent_uses_nothrow_new(good_promise_13);
|
|
|
|
struct mismatch_gro_type_tag1 {};
|
|
template<>
|
|
struct std::experimental::coroutine_traits<int, mismatch_gro_type_tag1> {
|
|
struct promise_type {
|
|
void get_return_object() {} //expected-note {{member 'get_return_object' declared here}}
|
|
suspend_always initial_suspend() { return {}; }
|
|
suspend_always final_suspend() { return {}; }
|
|
void return_void() {}
|
|
void unhandled_exception();
|
|
};
|
|
};
|
|
|
|
extern "C" int f(mismatch_gro_type_tag1) {
|
|
// expected-error@-1 {{cannot initialize return object of type 'int' with an rvalue of type 'void'}}
|
|
co_return; //expected-note {{function is a coroutine due to use of 'co_return' here}}
|
|
}
|
|
|
|
struct mismatch_gro_type_tag2 {};
|
|
template<>
|
|
struct std::experimental::coroutine_traits<int, mismatch_gro_type_tag2> {
|
|
struct promise_type {
|
|
void *get_return_object() {} //expected-note {{member 'get_return_object' declared here}}
|
|
suspend_always initial_suspend() { return {}; }
|
|
suspend_always final_suspend() { return {}; }
|
|
void return_void() {}
|
|
void unhandled_exception();
|
|
};
|
|
};
|
|
|
|
extern "C" int f(mismatch_gro_type_tag2) {
|
|
// expected-error@-1 {{cannot initialize return object of type 'int' with an lvalue of type 'void *'}}
|
|
co_return; //expected-note {{function is a coroutine due to use of 'co_return' here}}
|
|
}
|
|
|
|
struct mismatch_gro_type_tag3 {};
|
|
template<>
|
|
struct std::experimental::coroutine_traits<int, mismatch_gro_type_tag3> {
|
|
struct promise_type {
|
|
int get_return_object() {}
|
|
static void get_return_object_on_allocation_failure() {} //expected-note {{member 'get_return_object_on_allocation_failure' declared here}}
|
|
suspend_always initial_suspend() { return {}; }
|
|
suspend_always final_suspend() { return {}; }
|
|
void return_void() {}
|
|
void unhandled_exception();
|
|
};
|
|
};
|
|
|
|
extern "C" int f(mismatch_gro_type_tag3) {
|
|
// expected-error@-1 {{cannot initialize return object of type 'int' with an rvalue of type 'void'}}
|
|
co_return; //expected-note {{function is a coroutine due to use of 'co_return' here}}
|
|
}
|
|
|
|
|
|
struct mismatch_gro_type_tag4 {};
|
|
template<>
|
|
struct std::experimental::coroutine_traits<int, mismatch_gro_type_tag4> {
|
|
struct promise_type {
|
|
int get_return_object() {}
|
|
static char *get_return_object_on_allocation_failure() {} //expected-note {{member 'get_return_object_on_allocation_failure' declared}}
|
|
suspend_always initial_suspend() { return {}; }
|
|
suspend_always final_suspend() { return {}; }
|
|
void return_void() {}
|
|
void unhandled_exception();
|
|
};
|
|
};
|
|
|
|
extern "C" int f(mismatch_gro_type_tag4) {
|
|
// expected-error@-1 {{cannot initialize return object of type 'int' with an rvalue of type 'char *'}}
|
|
co_return; //expected-note {{function is a coroutine due to use of 'co_return' here}}
|
|
}
|
|
|
|
struct bad_promise_no_return_func { // expected-note {{'bad_promise_no_return_func' defined here}}
|
|
coro<bad_promise_no_return_func> get_return_object();
|
|
suspend_always initial_suspend();
|
|
suspend_always final_suspend();
|
|
void unhandled_exception();
|
|
};
|
|
// FIXME: The PDTS currently specifies this as UB, technically forbidding a
|
|
// diagnostic.
|
|
coro<bad_promise_no_return_func> no_return_value_or_return_void() {
|
|
// expected-error@-1 {{'bad_promise_no_return_func' must declare either 'return_value' or 'return_void'}}
|
|
co_await a;
|
|
}
|
|
|
|
struct bad_await_suspend_return {
|
|
bool await_ready();
|
|
// expected-error@+1 {{return type of 'await_suspend' is required to be 'void' or 'bool' (have 'char')}}
|
|
char await_suspend(std::experimental::coroutine_handle<>);
|
|
void await_resume();
|
|
};
|
|
struct bad_await_ready_return {
|
|
// expected-note@+1 {{return type of 'await_ready' is required to be contextually convertible to 'bool'}}
|
|
void await_ready();
|
|
bool await_suspend(std::experimental::coroutine_handle<>);
|
|
void await_resume();
|
|
};
|
|
struct await_ready_explicit_bool {
|
|
struct BoolT {
|
|
explicit operator bool() const;
|
|
};
|
|
BoolT await_ready();
|
|
void await_suspend(std::experimental::coroutine_handle<>);
|
|
void await_resume();
|
|
};
|
|
template <class SuspendTy>
|
|
struct await_suspend_type_test {
|
|
bool await_ready();
|
|
// expected-error@+2 {{return type of 'await_suspend' is required to be 'void' or 'bool' (have 'bool &')}}
|
|
// expected-error@+1 {{return type of 'await_suspend' is required to be 'void' or 'bool' (have 'bool &&')}}
|
|
SuspendTy await_suspend(std::experimental::coroutine_handle<>);
|
|
void await_resume();
|
|
};
|
|
void test_bad_suspend() {
|
|
{
|
|
// FIXME: The actual error emitted here is terrible, and no number of notes can save it.
|
|
bad_await_ready_return a;
|
|
// expected-error@+1 {{value of type 'void' is not contextually convertible to 'bool'}}
|
|
co_await a; // expected-note {{call to 'await_ready' implicitly required by coroutine function here}}
|
|
}
|
|
{
|
|
bad_await_suspend_return b;
|
|
co_await b; // expected-note {{call to 'await_suspend' implicitly required by coroutine function here}}
|
|
}
|
|
{
|
|
await_ready_explicit_bool c;
|
|
co_await c; // OK
|
|
}
|
|
{
|
|
await_suspend_type_test<bool &&> a;
|
|
await_suspend_type_test<bool &> b;
|
|
await_suspend_type_test<const void> c;
|
|
await_suspend_type_test<const volatile bool> d;
|
|
co_await a; // expected-note {{call to 'await_suspend' implicitly required by coroutine function here}}
|
|
co_await b; // expected-note {{call to 'await_suspend' implicitly required by coroutine function here}}
|
|
co_await c; // OK
|
|
co_await d; // OK
|
|
}
|
|
}
|
|
|
|
template <int ID = 0>
|
|
struct NoCopy {
|
|
NoCopy(NoCopy const&) = delete; // expected-note 2 {{deleted here}}
|
|
};
|
|
template <class T, class U>
|
|
void test_dependent_param(T t, U) {
|
|
// expected-error@-1 {{call to deleted constructor of 'NoCopy<0>'}}
|
|
// expected-error@-2 {{call to deleted constructor of 'NoCopy<1>'}}
|
|
((void)t);
|
|
co_return 42;
|
|
}
|
|
template void test_dependent_param(NoCopy<0>, NoCopy<1>); // expected-note {{requested here}}
|