clang/test/SemaTemplate/late-parsing-eager-instantiation.cpp

   1 // RUN: %clang_cc1 -std=c++14 -verify %s
   2
   3 // pr33561
   4 class ArrayBuffer;
   5 template <typename T> class Trans_NS_WTF_RefPtr {
   6 public:
   7   ArrayBuffer *operator->() { return nullptr; }
   8 };
   9 Trans_NS_WTF_RefPtr<ArrayBuffer> get();
  10 template <typename _Visitor>
  11 constexpr void visit(_Visitor __visitor) {
  12   __visitor(get()); // expected-note {{in instantiation}}
  13 }
  14 class ArrayBuffer {
  15   char data() {
  16     visit([](auto buffer) -> char { // expected-note {{in instantiation}}
  17       buffer->data();
  18     }); // expected-warning {{non-void lambda does not return a value}}
  19   } // expected-warning {{non-void function does not return a value}}
  20 };
  21
  22 // pr34185
  23 template <typename Promise> struct coroutine_handle {
  24   Promise &promise() const { return
  25     *static_cast<Promise *>(nullptr); // expected-warning {{binding dereferenced null}}
  26   }
  27 };
  28
  29 template <typename Promise> auto GetCurrenPromise() {
  30   struct Awaiter { // expected-note {{in instantiation}}
  31     void await_suspend(coroutine_handle<Promise> h) {
  32       h.promise(); // expected-note {{in instantiation}}
  33     }
  34   };
  35   return Awaiter{};
  36 }
  37
  38 void foo() {
  39   auto &&p = GetCurrenPromise<int>(); // expected-note {{in instantiation}}
  40 }