clang/test/Sema/attr-availability-macosx.cpp

// RUN: %clang_cc1 "-triple" "arm64-apple-macosx10.15" -fsyntax-only -verify %s

__attribute__((availability(macos,introduced=11)))
inline bool try_acquire() {
  return true;
}

template <class T>
__attribute__((availability(macos,introduced=11)))
bool try_acquire_for(T duration) { // expected-note{{'try_acquire_for<int>' has been marked as being introduced in macOS 11 here, but the deployment target is macOS 10.15}}
  return try_acquire();
}

int main() {
  try_acquire_for(1); // expected-warning{{'try_acquire_for<int>' is only available on macOS 11 or newer}}
  // expected-note@-1{{enclose 'try_acquire_for<int>' in a __builtin_available check to silence this warning}}
}

namespace typename_template {
  struct [[clang::availability(macos, introduced = 16)]] A {};

  template<class T> struct B { using type = T; };
  template <class T> struct C {
    typename B<T>::type v;
  };

  struct [[clang::availability(macos, introduced = 16)]] D {
    C<A> c;
  };
} // namespace typename_template