2fbd254aa4
Summary: 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. But move the coroutine component into the std namespace may be an break change. So I planned to split this change into two patch. One in clang and other in libcxx. 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 and emit a warning in this case. So the existing codes wouldn't be break after update compiler. Test Plan: check-clang, check-libcxx Reviewed By: lxfind Differential Revision: https://reviews.llvm.org/D108696
52 lines
1.4 KiB
C++
52 lines
1.4 KiB
C++
// RUN: %clang_cc1 -std=c++14 -fcoroutines-ts -triple=x86_64-unknown-linux-gnu -emit-llvm %s -o - -disable-llvm-passes | FileCheck %s
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#include "Inputs/coroutine.h"
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struct coro1 {
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struct promise_type {
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coro1 get_return_object();
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std::suspend_never initial_suspend();
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std::suspend_never final_suspend() noexcept;
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void return_void();
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};
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};
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coro1 f() {
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co_await std::suspend_never{};
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}
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// CHECK-LABEL: define{{.*}} void @_Z1fv(
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// CHECK: call void @_ZNSt13suspend_never12await_resumeEv(%"struct.std::suspend_never"*
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// CHECK: call void @_ZN5coro112promise_type11return_voidEv(%"struct.coro1::promise_type"* {{[^,]*}} %__promise)
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struct A {
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A();
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~A();
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};
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coro1 f2() {
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co_return (void) A{};
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}
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// CHECK-LABEL: define{{.*}} void @_Z2f2v(
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// CHECK: call void @_ZN1AC1Ev(%struct.A* {{[^,]*}} %[[AVar:.*]])
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// CHECK-NEXT: call void @_ZN1AD1Ev(%struct.A* {{[^,]*}} %[[AVar]])
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// CHECK-NEXT: call void @_ZN5coro112promise_type11return_voidEv(%"struct.coro1::promise_type"*
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struct coro2 {
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struct promise_type {
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coro2 get_return_object();
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std::suspend_never initial_suspend();
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std::suspend_never final_suspend() noexcept;
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void return_value(int);
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};
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};
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coro2 g() {
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co_return 42;
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}
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// CHECK-LABEL: define{{.*}} void @_Z1gv(
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// CHECK: call void @_ZNSt13suspend_never12await_resumeEv(%"struct.std::suspend_never"*
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// CHECK: call void @_ZN5coro212promise_type12return_valueEi(%"struct.coro2::promise_type"* {{[^,]*}} %__promise, i32 42)
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