clang/test/SemaCXX/weak-init.cpp

   1 // RUN: %clang_cc1 %s -verify -fsyntax-only
   2 // RUN: %clang_cc1 %s -verify -fsyntax-only -fexperimental-new-constant-interpreter
   3
   4 extern const int W1 __attribute__((weak)) = 10; // expected-note {{declared here}}
   5
   6 static_assert(W1 == 10, ""); // expected-error   {{static assertion expression is not an integral constant expression}}
   7                              // expected-note@-1 {{initializer of weak variable 'W1' is not considered constant because it may be different at runtime}}
   8
   9 extern const int W2 __attribute__((weak)) = 20;
  10
  11 int S2[W2]; // expected-error {{variable length array declaration not allowed at file scope}}
  12
  13 extern const int W3 __attribute__((weak)) = 30; // expected-note {{declared here}}
  14
  15 constexpr int S3 = W3; // expected-error   {{constexpr variable 'S3' must be initialized by a constant expression}}
  16                        // expected-note@-1 {{initializer of weak variable 'W3' is not considered constant because it may be different at runtime}}