d30ca5e2e2
This patch tries to implement RVO for coroutine's return object got from get_return_object. From [dcl.fct.def.coroutine]/p7 we could know that the return value of get_return_object is either a reference or a prvalue. So it makes sense to do copy elision for the return value. The return object should be constructed directly into the storage where they would otherwise be copied/moved to. Test Plan: folly, check-all Reviewed By: junparser Differential revision: https://reviews.llvm.org/D117087
27 lines
701 B
C++
27 lines
701 B
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin9 %s -std=c++20 -fsyntax-only -verify
|
|
// expected-no-diagnostics
|
|
|
|
#include "Inputs/std-coroutine.h"
|
|
|
|
class invoker {
|
|
public:
|
|
class invoker_promise {
|
|
public:
|
|
invoker get_return_object() { return invoker{}; }
|
|
auto initial_suspend() { return std::suspend_never{}; }
|
|
auto final_suspend() noexcept { return std::suspend_never{}; }
|
|
void return_void() {}
|
|
void unhandled_exception() {}
|
|
};
|
|
using promise_type = invoker_promise;
|
|
invoker() {}
|
|
invoker(const invoker &) = delete;
|
|
invoker &operator=(const invoker &) = delete;
|
|
invoker(invoker &&) = delete;
|
|
invoker &operator=(invoker &&) = delete;
|
|
};
|
|
|
|
invoker f() {
|
|
co_return;
|
|
}
|