ec117158a3
Now in libcxx and clang, all the coroutine components are defined in std::experimental namespace. And now the coroutine TS is merged into C++20. So in the working draft like N4892, we could find the coroutine components is defined in std namespace instead of std::experimental namespace. And the coroutine support in clang seems to be relatively stable. So I think it may be suitable to move the coroutine component into the experiment namespace now. This patch would make clang lookup coroutine_traits in std namespace first. For the compatibility consideration, clang would lookup in std::experimental namespace if it can't find definitions in std namespace. So the existing codes wouldn't be break after update compiler. And in case the compiler found std::coroutine_traits and std::experimental::coroutine_traits at the same time, it would emit an error for it. The support for looking up std::experimental::coroutine_traits would be removed in Clang16. Reviewed By: lxfind, Quuxplusone Differential Revision: https://reviews.llvm.org/D108696
86 lines
2.2 KiB
C++
86 lines
2.2 KiB
C++
// Test this without pch.
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// RUN: %clang_cc1 -include %s -verify -std=c++1z -fcoroutines-ts %s
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// Test with pch.
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// RUN: %clang_cc1 -std=c++1z -fcoroutines-ts -emit-pch -o %t %s
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// RUN: %clang_cc1 -include-pch %t -verify -std=c++1z -fcoroutines-ts %s
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#ifndef HEADER
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#define HEADER
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namespace std {
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template <typename... T> struct coroutine_traits;
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template <class Promise = void> struct coroutine_handle {
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coroutine_handle() = default;
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static coroutine_handle from_address(void *) noexcept;
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};
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template <> struct coroutine_handle<void> {
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static coroutine_handle from_address(void *) noexcept;
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coroutine_handle() = default;
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template <class PromiseType>
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coroutine_handle(coroutine_handle<PromiseType>) noexcept;
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};
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} // namespace std
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struct suspend_always {
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bool await_ready() noexcept;
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void await_suspend(std::coroutine_handle<>) noexcept;
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void await_resume() noexcept;
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};
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template <typename... Args> struct std::coroutine_traits<void, Args...> {
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struct promise_type {
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void get_return_object() noexcept;
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suspend_always initial_suspend() noexcept;
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suspend_always final_suspend() noexcept;
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void return_void() noexcept;
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suspend_always yield_value(int) noexcept;
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promise_type();
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~promise_type() noexcept;
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void unhandled_exception() noexcept;
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};
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};
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template <typename... Args> struct std::coroutine_traits<int, Args...> {
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struct promise_type {
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int get_return_object() noexcept;
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suspend_always initial_suspend() noexcept;
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suspend_always final_suspend() noexcept;
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void return_value(int) noexcept;
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promise_type();
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~promise_type() noexcept;
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void unhandled_exception() noexcept;
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};
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};
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template <typename T>
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void f(T x) { // checks coawait_expr and coroutine_body_stmt
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co_yield 42; // checks coyield_expr
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co_await x; // checks dependent_coawait
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co_return; // checks coreturn_stmt
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}
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template <typename T>
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int f2(T x) { // checks coawait_expr and coroutine_body_stmt
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co_return x; // checks coreturn_stmt with expr
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}
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struct S {};
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S operator co_await(S) { return S(); }
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template <typename T>
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int f3(T x) {
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co_await x; // checks dependent_coawait with overloaded co_await operator
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}
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#else
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// expected-no-diagnostics
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void g() {
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f(suspend_always{});
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f2(42);
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}
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#endif
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