clang/test/SemaCXX/subst-func-type-invalid-ret-type.cpp

   1 // RUN: %clang -fsyntax-only -std=c++17 %s -Xclang -verify
   2
   3 // The important part is that we do not crash.
   4
   5 template<typename T> T declval();
   6
   7 template <typename T>
   8 auto Call(T x) -> decltype(declval<T>()(0)) {} // expected-note{{candidate template ignored}}
   9
  10 class Status {};
  11
  12 void fun() {
  13   // The Status() (instead of Status) here used to cause a crash.
  14   Call([](auto x) -> Status() {}); // expected-error{{function cannot return function type 'Status ()}}
  15   // expected-error@-1{{no matching function for call to 'Call'}}
  16 }