clang/test/SemaCXX/attr-weakref.cpp

   1 // RUN: %clang_cc1 -triple x86_64-pc-linux-gnu -fsyntax-only -verify -std=c++11 %s
   2
   3 // GCC will accept anything as the argument of weakref. Should we
   4 // check for an existing decl?
   5 static int a1() __attribute__((weakref ("foo")));
   6 static int a2() __attribute__((weakref, alias ("foo")));
   7
   8 static int a3 __attribute__((weakref ("foo")));
   9 static int a4 __attribute__((weakref, alias ("foo")));
  10
  11 // gcc rejects, clang accepts
  12 static int a5 __attribute__((alias ("foo"), weakref));
  13
  14 // this is pointless, but accepted by gcc. We reject it.
  15 static int a6 __attribute__((weakref)); //expected-error {{weakref declaration of 'a6' must also have an alias attribute}}
  16
  17 // gcc warns, clang rejects
  18 void f(void) {
  19   static int a __attribute__((weakref ("v2"))); // expected-error {{declaration of 'a' must be in a global context}}
  20 }
  21
  22 // both gcc and clang reject
  23 class c {
  24   static int a __attribute__((weakref ("v2"))); // expected-error {{declaration of 'a' must be in a global context}}
  25   static int b() __attribute__((weakref ("f3"))); // expected-error {{declaration of 'b' must be in a global context}}
  26 };
  27 int a7() __attribute__((weakref ("f1"))); // expected-error {{weakref declaration must have internal linkage}}
  28 int a8 __attribute__((weakref ("v1"))); // expected-error {{weakref declaration must have internal linkage}}
  29
  30 // gcc accepts this
  31 int a9 __attribute__((weakref));  // expected-error {{weakref declaration of 'a9' must also have an alias attribute}}
  32
  33 static int a10();
  34 int a10() __attribute__((weakref ("foo")));
  35
  36 static int v __attribute__((weakref(a1), alias("foo"))); // expected-error {{expected string literal as argument of 'weakref' attribute}}
  37
  38 __attribute__((weakref ("foo"))) auto a11 = 1; // expected-error {{weakref declaration must have internal linkage}}