clang/test/Sema/fallthrough-attr.c

   1 // RUN: %clang_cc1 -fsyntax-only -std=gnu89 -verify -Wimplicit-fallthrough %s
   2 // RUN: %clang_cc1 -fsyntax-only -std=gnu99 -verify -Wimplicit-fallthrough %s
   3 // RUN: %clang_cc1 -fsyntax-only -std=c99 -verify -Wimplicit-fallthrough %s
   4 // RUN: %clang_cc1 -fsyntax-only -std=c11 -verify -Wimplicit-fallthrough %s
   5 // RUN: %clang_cc1 -fsyntax-only -std=c2x -DC2X -verify -Wimplicit-fallthrough %s
   6
   7 int fallthrough_attribute_spelling(int n) {
   8   switch (n) {
   9   case 0:
  10     n++;
  11   case 1:
  12 #if defined(C2X)
  13 // expected-warning@-2{{unannotated fall-through between switch labels}} expected-note@-2{{insert '[[fallthrough]];' to silence this warning}} expected-note@-2{{insert 'break;' to avoid fall-through}}
  14 #else
  15 // expected-warning@-4{{unannotated fall-through between switch labels}} expected-note@-4{{insert '__attribute__((fallthrough));' to silence this warning}} expected-note@-4{{insert 'break;' to avoid fall-through}}
  16 #endif
  17     n++;
  18     __attribute__((fallthrough));
  19   case 2:
  20     n++;
  21     break;
  22   }
  23   return n;
  24 }