clang/test/Sema/attr-preferred-type.cpp

   1 // RUN: %clang_cc1 -verify %s
   2
   3 struct A {
   4   enum E : unsigned {};
   5   enum E2 : int {};
   6   [[clang::preferred_type(E)]] unsigned b : 2;
   7   [[clang::preferred_type(E)]] int b2 : 2;
   8   [[clang::preferred_type(E2)]] const unsigned b3 : 2;
   9   [[clang::preferred_type(bool)]] unsigned b4 : 1;
  10   [[clang::preferred_type(bool)]] unsigned b5 : 2;
  11   [[clang::preferred_type()]] unsigned b6 : 2;
  12   // expected-error@-1 {{'preferred_type' attribute takes one argument}}
  13   [[clang::preferred_type]] unsigned b7 : 2;
  14   // expected-error@-1 {{'preferred_type' attribute takes one argument}}
  15   [[clang::preferred_type(E, int)]] unsigned b8 : 2;
  16   // expected-error@-1 {{expected ')'}}
  17   // expected-error@-2 {{expected ','}}
  18   // expected-warning@-3 {{unknown attribute 'int' ignored}}
  19 };