clang/test/PCH/cxx2a-bitfield-init.cpp

   1 // RUN: %clang_cc1 -std=c++2a -include %s -verify %s
   2 // RUN: %clang_cc1 -std=c++2a -emit-pch %s -o %t
   3 // RUN: %clang_cc1 -std=c++2a -include-pch %t -verify %s -DPCH
   4 // RUN: %clang_cc1 -std=c++2a -emit-pch -fpch-instantiate-templates %s -o %t
   5 // RUN: %clang_cc1 -std=c++2a -include-pch %t -verify %s -DPCH
   6
   7 #ifndef HEADER
   8 #define HEADER
   9
  10 struct S {
  11   unsigned int n : 5 = 49; // expected-warning {{changes value}}
  12 };
  13
  14 int a;
  15 template<bool B> struct T {
  16   int m : B ? 8 : a = 42;
  17 };
  18
  19 #else
  20
  21 // expected-error@-5 {{constant expression}} expected-note@-5 {{cannot modify}}
  22
  23 static_assert(S().n == 17);
  24 static_assert(T<true>().m == 0);
  25 int q = T<false>().m; // expected-note {{instantiation of}}
  26
  27 #endif