1 files changed, 147 insertions, 0 deletions
diff --git a/test/SemaCXX/unaddressable-functions.cpp b/test/SemaCXX/unaddressable-functions.cpp
new file mode 100644
index 000000000000..286cbee5ea9b
--- /dev/null
+++ b/test/SemaCXX/unaddressable-functions.cpp
@@ -0,0 +1,147 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s -std=c++14
+
+namespace access_control {
+class Private {
+  void check(int *) __attribute__((enable_if(false, "")));
+  void check(double *) __attribute__((enable_if(true, "")));
+
+  static void checkStatic(int *) __attribute__((enable_if(false, "")));
+  static void checkStatic(double *) __attribute__((enable_if(true, "")));
+};
+
+auto Priv = reinterpret_cast<void (Private::*)(char *)>(&Private::check); // expected-error{{'check' is a private member of 'access_control::Private'}} expected-note@6{{implicitly declared private here}}
+
+auto PrivStatic = reinterpret_cast<void (*)(char *)>(&Private::checkStatic); // expected-error{{'checkStatic' is a private member of 'access_control::Private'}} expected-note@9{{implicitly declared private here}}
+
+class Protected {
+protected:
+  void check(int *) __attribute__((enable_if(false, "")));
+  void check(double *) __attribute__((enable_if(true, "")));
+
+  static void checkStatic(int *) __attribute__((enable_if(false, "")));
+  static void checkStatic(double *) __attribute__((enable_if(true, "")));
+};
+
+auto Prot = reinterpret_cast<void (Protected::*)(char *)>(&Protected::check); // expected-error{{'check' is a protected member of 'access_control::Protected'}} expected-note@19{{declared protected here}}
+
+auto ProtStatic = reinterpret_cast<void (*)(char *)>(&Protected::checkStatic); // expected-error{{'checkStatic' is a protected member of 'access_control::Protected'}} expected-note@22{{declared protected here}}
+}
+
+namespace unavailable {
+// Ensure that we check that the function can be called
+void foo() __attribute__((unavailable("don't call this")));
+void foo(int) __attribute__((enable_if(false, "")));
+
+void *Ptr = reinterpret_cast<void*>(foo); // expected-error{{'foo' is unavailable: don't call this}} expected-note@-3{{explicitly marked unavailable here}}
+}
+
+namespace template_deduction {
+void foo() __attribute__((enable_if(false, "")));
+
+void bar() __attribute__((enable_if(true, "")));
+void bar() __attribute__((enable_if(false, "")));
+
+void baz(int a) __attribute__((enable_if(true, "")));
+void baz(int a) __attribute__((enable_if(a, "")));
+void baz(int a) __attribute__((enable_if(false, "")));
+
+void qux(int a) __attribute__((enable_if(1, "")));
+void qux(int a) __attribute__((enable_if(true, "")));
+void qux(int a) __attribute__((enable_if(a, "")));
+void qux(int a) __attribute__((enable_if(false, "")));
+
+template <typename Fn, typename... Args> void call(Fn F, Args... As) {
+  F(As...);
+}
+
+void test() {
+  call(foo); // expected-error{{cannot take address of function 'foo'}}
+  call(bar);
+  call(baz, 0);
+  call(qux, 0); // expected-error{{no matching function for call to 'call'}} expected-note@53{{candidate template ignored: couldn't infer template argument 'Fn'}}
+
+  auto Ptr1 = foo; // expected-error{{cannot take address of function 'foo'}}
+  auto Ptr2 = bar;
+  auto Ptr3 = baz;
+  auto Ptr4 = qux; // expected-error{{variable 'Ptr4' with type 'auto' has incompatible initializer of type '<overloaded function type>'}}
+}
+
+template <typename Fn, typename T, typename... Args>
+void callMem(Fn F, T t, Args... As) {
+  (t.*F)(As...);
+}
+
+class Foo {
+  void bar() __attribute__((enable_if(true, "")));
+  void bar() __attribute__((enable_if(false, "")));
+
+  static void staticBar() __attribute__((enable_if(true, "")));
+  static void staticBar() __attribute__((enable_if(false, "")));
+};
+
+void testAccess() {
+  callMem(&Foo::bar, Foo()); // expected-error{{'bar' is a private member of 'template_deduction::Foo'}} expected-note@-8{{implicitly declared private here}}
+  call(&Foo::staticBar); // expected-error{{'staticBar' is a private member of 'template_deduction::Foo'}} expected-note@-6{{implicitly declared private here}}
+}
+}
+
+namespace template_template_deduction {
+void foo() __attribute__((enable_if(false, "")));
+template <typename T>
+T foo() __attribute__((enable_if(true, "")));
+
+template <typename Fn, typename... Args> auto call(Fn F, Args... As) {
+  return F(As...);
+}
+
+auto Ok = call(&foo<int>);
+auto Fail = call(&foo); // expected-error{{no matching function for call to 'call'}} expected-note@-5{{candidate template ignored: couldn't infer template argument 'Fn'}}
+
+auto PtrOk = &foo<int>;
+auto PtrFail = &foo; // expected-error{{variable 'PtrFail' with type 'auto' has incompatible initializer of type '<overloaded function type>'}}
+}
+
+namespace pointer_equality {
+  using FnTy = void (*)();
+
+  void bothEnableIf() __attribute__((enable_if(false, "")));
+  void bothEnableIf() __attribute__((enable_if(true, "")));
+
+  void oneEnableIf() __attribute__((enable_if(false, "")));
+  void oneEnableIf();
+
+  void test() {
+    FnTy Fn;
+    (void)(Fn == bothEnableIf);
+    (void)(Fn == &bothEnableIf);
+    (void)(Fn == oneEnableIf);
+    (void)(Fn == &oneEnableIf);
+  }
+
+  void unavailableEnableIf() __attribute__((enable_if(false, "")));
+  void unavailableEnableIf() __attribute__((unavailable("noooo"))); // expected-note 2{{marked unavailable here}}
+
+  void testUnavailable() {
+    FnTy Fn;
+    (void)(Fn == unavailableEnableIf); // expected-error{{is unavailable}}
+    (void)(Fn == &unavailableEnableIf); // expected-error{{is unavailable}}
+  }
+
+  class Foo {
+    static void staticAccessEnableIf(); // expected-note 2{{declared private here}}
+    void accessEnableIf(); // expected-note{{declared private here}}
+
+  public:
+    static void staticAccessEnableIf() __attribute__((enable_if(false, "")));
+    void accessEnableIf() __attribute__((enable_if(false, "")));
+  };
+
+  void testAccess() {
+    FnTy Fn;
+    (void)(Fn == Foo::staticAccessEnableIf); // expected-error{{is a private member}}
+    (void)(Fn == &Foo::staticAccessEnableIf); // expected-error{{is a private member}}
+
+    void (Foo::*MemFn)();
+    (void)(MemFn == &Foo::accessEnableIf); // expected-error{{is a private member}}
+  }
+}