[coroutines] Initial stub Sema functionality for handling coroutine await / yield / return.

llvm-svn: 250993

1 files changed, 51 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/coroutines.cpp b/clang/test/SemaCXX/coroutines.cpp
new file mode 100644
index 00000000000..ae24dd2979f
--- /dev/null
+++ b/clang/test/SemaCXX/coroutines.cpp
@@ -0,0 +1,51 @@
+// RUN: %clang_cc1 -std=c++14 -fcoroutines -verify %s
+
+void mixed_yield() {
+  // FIXME: diagnose
+  co_yield 0;
+  return;
+}
+
+void mixed_await() {
+  // FIXME: diagnose
+  co_await 0;
+  return;
+}
+
+void only_coreturn() {
+  // FIXME: diagnose
+  co_return;
+}
+
+void mixed_coreturn(bool b) {
+  // FIXME: diagnose
+  if (b)
+    co_return;
+  else
+    return;
+}
+
+struct CtorDtor {
+  CtorDtor() {
+    co_yield 0; // expected-error {{'co_yield' cannot be used in a constructor}}
+  }
+  CtorDtor(int n) {
+    // The spec doesn't say this is ill-formed, but it must be.
+    co_await n; // expected-error {{'co_await' cannot be used in a constructor}}
+  }
+  ~CtorDtor() {
+    co_return 0; // expected-error {{'co_return' cannot be used in a destructor}}
+  }
+  // FIXME: The spec says this is ill-formed.
+  void operator=(CtorDtor&) {
+    co_yield 0;
+  }
+};
+
+constexpr void constexpr_coroutine() {
+  co_yield 0; // expected-error {{'co_yield' cannot be used in a constexpr function}}
+}
+
+void varargs_coroutine(const char *, ...) {
+  co_await 0; // expected-error {{'co_await' cannot be used in a varargs function}}
+}