clang/test/Frontend/backend-attribute-error-warning.cpp

   1 // REQUIRES: x86-registered-target
   2 // RUN: %clang_cc1 -triple x86_64-linux-gnu -verify=expected,enabled -emit-codegen-only %s
   3 // RUN: %clang_cc1 -verify -triple x86_64-linux-gnu -emit-codegen-only -Wno-attribute-warning %s
   4
   5 __attribute__((error("oh no foo"))) void foo(void);
   6
   7 __attribute__((error("oh no bar"))) void bar(void);
   8
   9 int x(void) {
  10   return 8 % 2 == 1;
  11 }
  12
  13 __attribute__((warning("oh no quux"))) void quux(void);
  14
  15 __attribute__((error("demangle me"))) void __compiletime_assert_455(void);
  16
  17 __attribute__((error("one"), error("two"))) // expected-warning {{attribute 'error' is already applied with different arguments}}
  18 void                                        // expected-note@-1 {{previous attribute is here}}
  19 duplicate_errors(void);
  20
  21 __attribute__((warning("one"), warning("two"))) // expected-warning {{attribute 'warning' is already applied with different arguments}}
  22 void                                            // expected-note@-1 {{previous attribute is here}}
  23 duplicate_warnings(void);
  24
  25 void baz(void) {
  26   foo(); // expected-error {{call to 'foo()' declared with 'error' attribute: oh no foo}}
  27   if (x())
  28     bar(); // expected-error {{call to 'bar()' declared with 'error' attribute: oh no bar}}
  29
  30   quux();                     // enabled-warning {{call to 'quux()' declared with 'warning' attribute: oh no quux}}
  31   __compiletime_assert_455(); // expected-error {{call to '__compiletime_assert_455()' declared with 'error' attribute: demangle me}}
  32   duplicate_errors();         // expected-error {{call to 'duplicate_errors()' declared with 'error' attribute: two}}
  33   duplicate_warnings();       // enabled-warning {{call to 'duplicate_warnings()' declared with 'warning' attribute: two}}
  34 }
  35
  36 #ifdef __cplusplus
  37 template <typename T>
  38 __attribute__((error("demangle me, too")))
  39 T
  40 nocall(T t);
  41
  42 struct Widget {
  43   __attribute__((warning("don't call me!")))
  44   operator int() { return 42; }
  45 };
  46
  47 void baz_cpp(void) {
  48   foo(); // expected-error {{call to 'foo()' declared with 'error' attribute: oh no foo}}
  49   if (x())
  50     bar(); // expected-error {{call to 'bar()' declared with 'error' attribute: oh no bar}}
  51   quux();  // enabled-warning {{call to 'quux()' declared with 'warning' attribute: oh no quux}}
  52
  53   // Test that we demangle correctly in the diagnostic for C++.
  54   __compiletime_assert_455(); // expected-error {{call to '__compiletime_assert_455()' declared with 'error' attribute: demangle me}}
  55   nocall<int>(42);            // expected-error {{call to 'int nocall<int>(int)' declared with 'error' attribute: demangle me, too}}
  56
  57   Widget W;
  58   int w = W; // enabled-warning {{call to 'Widget::operator int()' declared with 'warning' attribute: don't call me!}}
  59 }
  60 #endif