clang/test/SemaCXX/switch-implicit-fallthrough-blocks.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify -fblocks -std=c++11 -Wimplicit-fallthrough %s
   2
   3 void fallthrough_in_blocks() {
   4   void (^block)() = ^{
   5     int x = 0;
   6     switch (x) {
   7     case 0:
   8       x++;
   9       [[clang::fallthrough]]; // no diagnostics
  10     case 1:
  11       x++;
  12     default: // \
  13         expected-warning{{unannotated fall-through between switch labels}} \
  14         expected-note{{insert 'break;' to avoid fall-through}}
  15       break;
  16     }
  17   };
  18   block();
  19 }