clang/test/Sema/warn-conditional-emum-types-mismatch.c

   1 // RUN: %clang_cc1 -x c -fsyntax-only -verify -Wenum-compare-conditional %s
   2 // RUN: %clang_cc1 -x c++ -fsyntax-only -verify -Wenum-compare-conditional %s
   3
   4 enum ro { A = 0x10 };
   5 enum rw { B = 0xFF };
   6 enum { C = 0x1A};
   7
   8 enum {
   9   STATUS_SUCCESS,
  10   STATUS_FAILURE,
  11   MAX_BASE_STATUS_CODE
  12 };
  13
  14 enum ExtendedStatusCodes {
  15   STATUS_SOMETHING_INTERESTING = MAX_BASE_STATUS_CODE + 1000,
  16 };
  17
  18
  19 int get_flag(int cond) {
  20   return cond ? A : B;
  21   #ifdef __cplusplus
  22   // expected-warning@-2 {{conditional expression between different enumeration types ('ro' and 'rw')}}
  23   #else
  24   // expected-no-diagnostics
  25   #endif
  26 }
  27
  28 // In the following cases we purposefully differ from GCC and dont warn because
  29 // this code pattern is quite sensitive and we dont want to produce so many false positives.
  30
  31 int get_flag_anon_enum(int cond) {
  32   return cond ? A : C;
  33 }
  34
  35 int foo(int c) {
  36   return c ? STATUS_SOMETHING_INTERESTING : STATUS_SUCCESS;
  37 }