Vendor import of libc++ trunk r304222:vendor/libc++/libc++-trunk-r304222

https://llvm.org/svn/llvm-project/libcxx/trunk@304222

2 files changed, 55 insertions, 0 deletions

diff --git a/test/std/experimental/language.support/support.coroutines/coroutine.handle/coroutine.handle.export/from_address.fail.cpp b/test/std/experimental/language.support/support.coroutines/coroutine.handle/coroutine.handle.export/from_address.fail.cpp
new file mode 100644
index 000000000000..1c87b9443ecf
--- /dev/null
+++ b/test/std/experimental/language.support/support.coroutines/coroutine.handle/coroutine.handle.export/from_address.fail.cpp
@@ -0,0 +1,46 @@
+// -*- C++ -*-
+//===----------------------------------------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+// UNSUPPORTED: c++98, c++03, c++11
+// <experimental/coroutine>
+
+// template <class Promise = void>
+// struct coroutine_handle;
+
+// static coroutine_handle from_address(void*) noexcept
+
+// Test that `from_address` is explicitly ill-formed when called with a typed
+// pointer. The user cannot possibly have a typed pointer to the coroutine.
+// FIXME: This behavior is an extension, and should upstreamed into the TS or
+// the test removed if the TS changes are rejected.
+
+#include <experimental/coroutine>
+#include <type_traits>
+#include <cassert>
+
+namespace coro = std::experimental;
+
+int main()
+{
+  {
+    using H = coro::coroutine_handle<>;
+    // expected-error@experimental/coroutine:* 3 {{coroutine_handle<void>::from_address cannot be called with non-void pointers}}
+    H::from_address((int*)nullptr); // expected-note {{requested here}}
+    H::from_address((const void*)nullptr); // expected-note {{requested here}}
+    H::from_address((const char*)nullptr); // expected-note {{requested here}}
+  }
+  {
+    using H = coro::coroutine_handle<int>;
+    // 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"}}
+    H::from_address((const char*)nullptr); // expected-note {{requested here}}
+    // expected-error@experimental/coroutine:* 1 {{coroutine_handle<promise_type>::from_address cannot be called with non-void pointers}}
+    H::from_address((int*)nullptr); // expected-note {{requested here}}
+  }
+}
diff --git a/test/std/experimental/language.support/support.coroutines/lit.local.cfg b/test/std/experimental/language.support/support.coroutines/lit.local.cfg
new file mode 100644
index 000000000000..a0b3de8afaa3
--- /dev/null
+++ b/test/std/experimental/language.support/support.coroutines/lit.local.cfg
@@ -0,0 +1,9 @@
+# If the compiler doesn't support coroutines mark all of the tests under
+# this directory as unsupported. Otherwise add the required `-fcoroutines-ts`
+# flag.
+if 'fcoroutines-ts' not in config.available_features:
+  config.unsupported = True
+else:
+  import copy
+  config.test_format.cxx = copy.deepcopy(config.test_format.cxx)
+  config.test_format.cxx.compile_flags += ['-fcoroutines-ts']