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')}} 54