clang/test/SemaCXX/switch-implicit-fallthrough-per-method.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 -Wimplicit-fallthrough-per-function %s
   2
   3
   4 int fallthrough(int n) {
   5   switch (n / 10) {
   6     case 0:
   7       n += 100;
   8     case 1:  // expected-warning{{unannotated fall-through}} expected-note{{insert '[[clang::fallthrough]];' to silence this warning}} expected-note{{insert 'break;' to avoid fall-through}}
   9       switch (n) {
  10       case 111:
  11         n += 111;
  12         [[clang::fallthrough]];
  13       case 112:
  14         n += 112;
  15       case 113:  // expected-warning{{unannotated fall-through}} expected-note{{insert '[[clang::fallthrough]];' to silence this warning}} expected-note{{insert 'break;' to avoid fall-through}}
  16         n += 113;
  17         break    ;
  18       }
  19   }
  20   return n;
  21 }
  22
  23 int fallthrough2(int n) {
  24   switch (n / 10) {
  25     case 0:
  26       n += 100;
  27     case 1:  // no warning, as we didn't "opt-in" for it in this method
  28       switch (n) {
  29       case 111:
  30         n += 111;
  31       case 112:  // no warning, as we didn't "opt-in" for it in this method
  32         n += 112;
  33       case 113:  // no warning, as we didn't "opt-in" for it in this method
  34         n += 113;
  35         break    ;
  36       }
  37   }
  38   return n;
  39 }
  40
  41 void unscoped(int n) {
  42   switch (n % 2) {
  43     case 0:
  44       [[fallthrough]];
  45     case 2:
  46       [[clang::fallthrough]];
  47     case 1:
  48       break;
  49   }
  50 }