Example from cppreference.com does not compile with MSVC

Question

Tried to compile the following example from cppreference.com:

#include <coroutine>

struct promise;
struct coroutine : std::coroutine_handle<promise>
{
    using promise_type = struct promise;
};

struct promise {
    coroutine get_return_object()
    {
        return { coroutine::from_promise(*this) };
    }
    std::suspend_always initial_suspend() noexcept { return {}; }
    std::suspend_never final_suspend() noexcept { return {}; }
    void return_void() {}
    void unhandled_exception() {}
};

struct S {
    int i;
    coroutine f() {
        std::cout << i;
        co_return;
    }
};

but got compiler error:

error C3789: this function cannot be a coroutine: 'coroutine::promise' does not declare the member 'get_return_object()'

Compiler: MSVC2019, /std:c++latest

Microsoft (R) C/C++ Optimizing Compiler Version 19.29.30137 for x86

But GCC12 compiles it, what is wrong with MSVC?

EDIT1

The same error with MSVC2022

Optimizing Compiler Version 19.30.30709 for x86

/std:c++latest

Answer 1

As the Site says:

Work in progress: This page is in progress of being updated to reflect the parts of Coroutines Technical Specification that were included in the working draft of C++20.

This example is not runnable with a MSVC2019 Compiler. You can install and try it with this version:

https://docs.microsoft.com/en-us/visualstudio/releases/2022/release-notes