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@@ -0,0 +1,46 @@
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+// -*- C++ -*-
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+//===----------------------------------------------------------------------===//
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+//
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+// The LLVM Compiler Infrastructure
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+//
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+// This file is dual licensed under the MIT and the University of Illinois Open
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+// Source Licenses. See LICENSE.TXT for details.
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+//
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+//===----------------------------------------------------------------------===//
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+
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+// UNSUPPORTED: c++98, c++03, c++11
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+// <experimental/coroutine>
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+
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+// template <class Promise = void>
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+// struct coroutine_handle;
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+
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+// static coroutine_handle from_address(void*) noexcept
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+
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+// Test that `from_address` is explicitly ill-formed when called with a typed
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+// pointer. The user cannot possibly have a typed pointer to the coroutine.
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+// FIXME: This behavior is an extension, and should upstreamed into the TS or
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+// the test removed if the TS changes are rejected.
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+
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+#include <experimental/coroutine>
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+#include <type_traits>
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+#include <cassert>
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+
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+namespace coro = std::experimental;
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+
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+int main()
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+{
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+ {
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+ using H = coro::coroutine_handle<>;
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+ // expected-error@experimental/coroutine:* 3 {{coroutine_handle<void>::from_address cannot be called with non-void pointers}}
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+ H::from_address((int*)nullptr); // expected-note {{requested here}}
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+ H::from_address((const void*)nullptr); // expected-note {{requested here}}
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+ H::from_address((const char*)nullptr); // expected-note {{requested here}}
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+ }
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+ {
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+ using H = coro::coroutine_handle<int>;
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+ // expected-error@experimental/coroutine:* 1 {{static_assert failed "coroutine_handle<promise_type>::from_address cannot be used with pointers to the coroutine's promise type; use 'from_promise' instead"}}
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+ H::from_address((const char*)nullptr); // expected-note {{requested here}}
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+ // expected-error@experimental/coroutine:* 1 {{coroutine_handle<promise_type>::from_address cannot be called with non-void pointers}}
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+ H::from_address((int*)nullptr); // expected-note {{requested here}}
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+ }
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+}
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