clang/test/Sema/fixed-enum.c

   1 // RUN: %clang_cc1 -Weverything -xc++ -std=c++11 -DCXX11 -verify %s
   2 // RUN: %clang_cc1 -Weverything -xc++ -std=c++03 -DCXX03 -verify %s
   3 // RUN: %clang_cc1 -Weverything -xobjective-c -DOBJC -verify %s
   4 // RUN: %clang_cc1 -Weverything -std=c11 -xc -DC11 -verify %s
   5 // RUN: %clang_cc1 -pedantic    -std=c11 -xc -DC11 -verify %s
   6 // RUN: %clang_cc1 -Weverything -std=c11 -xc -fms-extensions -DMS -verify %s
   7 // RUN: %clang_cc1 -Weverything -std=c2x -xc -DC23 -verify %s
   8 // RUN: %clang_cc1 -pedantic    -std=c2x -xc -DC23 -verify -Wpre-c23-compat %s
   9 // RUN: %clang_cc1 -Weverything -std=c23 -xc -DC23 -verify %s
  10 // RUN: %clang_cc1 -pedantic    -std=c23 -xc -DC23 -verify -Wpre-c23-compat %s
  11 // RUN: %clang_cc1 -Weverything -std=c23 -xc -fms-extensions -DC23 -verify %s
  12
  13 enum X : int {e};
  14 #if defined(CXX11)
  15 // expected-warning@-2{{enumeration types with a fixed underlying type are incompatible with C++98}}
  16 #elif defined(CXX03)
  17 // expected-warning@-4{{enumeration types with a fixed underlying type are a C++11 extension}}
  18 #elif defined(OBJC)
  19 // diagnostic
  20 #elif defined(C23)
  21 // expected-warning@-8{{enumeration types with a fixed underlying type are incompatible with C standards before C23}}
  22 #elif defined(C11)
  23 // expected-warning@-10{{enumeration types with a fixed underlying type are a C23 extension}}
  24 #elif defined(MS)
  25 // expected-warning@-12{{enumeration types with a fixed underlying type are a Microsoft extension}}
  26 #endif
  27
  28 // Don't warn about the forward declaration in any language mode.
  29 enum Fwd : int;
  30 enum Fwd : int { e2 };
  31 #if !defined(OBJC) && !defined(C23)
  32 // expected-warning@-3 {{enumeration types with a fixed underlying type}}
  33 // expected-warning@-3 {{enumeration types with a fixed underlying type}}
  34 #elif defined(C23)
  35 // expected-warning@-6 {{enumeration types with a fixed underlying type are incompatible with C standards before C23}}
  36 // expected-warning@-6 {{enumeration types with a fixed underlying type are incompatible with C standards before C23}}
  37 #endif
  38
  39 // Always error on the incompatible redeclaration.
  40 enum BadFwd : int;
  41 #if !defined(OBJC) && !defined(C23)
  42 // expected-warning@-2 {{enumeration types with a fixed underlying type}}
  43 #elif defined(C23)
  44 // expected-warning@-4 {{enumeration types with a fixed underlying type are incompatible with C standards before C23}}
  45 #endif
  46 // expected-note@-6 {{previous declaration is here}}
  47 enum BadFwd : char { e3 };
  48 #if !defined(OBJC) && !defined(C23)
  49 // expected-warning@-2 {{enumeration types with a fixed underlying type}}
  50 #elif defined(C23)
  51 // expected-warning@-4 {{enumeration types with a fixed underlying type are incompatible with C standards before C23}}
  52 #endif
  53 // expected-error@-6 {{enumeration redeclared with different underlying type 'char' (was 'int')}}