clang/test/Parser/cxx2b-label.cpp

   1 // RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx23 -std=c++23 -Wpre-c++23-compat %s
   2 // RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx20 -std=c++20 %s
   3
   4 void test_label_in_func() {
   5 label1:
   6     int x;
   7 label2:
   8     x = 1;
   9 label3: label4: label5:
  10 } // cxx20-warning {{label at end of compound statement is a C++23 extension}} \
  11      cxx23-warning {{label at end of compound statement is incompatible with C++ standards before C++23}}
  12
  13 int test_label_in_switch(int v) {
  14     switch (v) {
  15     case 1:
  16         return 1;
  17     case 2:
  18         return 2;
  19     case 3: case 4: case 5:
  20     } // cxx20-warning {{label at end of compound statement is a C++23 extension}} \
  21          cxx23-warning {{label at end of compound statement is incompatible with C++ standards before C++23}}
  22
  23     switch (v) {
  24     case 6:
  25         return 6;
  26     default:
  27     } // cxx20-warning {{label at end of compound statement is a C++23 extension}} \
  28          cxx23-warning {{label at end of compound statement is incompatible with C++ standards before C++23}}
  29
  30     return 0;
  31 }