clang/test/Parser/c2x-label.c

   1 // RUN: %clang_cc1 -fsyntax-only -std=c17 -Wc2x-compat -verify=c17 %s
   2 // RUN: %clang_cc1 -fsyntax-only -std=c2x -Wpre-c2x-compat -verify=c2x %s
   3
   4 void test_label_in_func() {
   5     int x;
   6 label1:
   7     x = 1;
   8 label2: label3: label4:
   9 } // c17-warning {{label at end of compound statement is a C23 extension}} \
  10      c2x-warning {{label at end of compound statement is incompatible with C standards before C23}}
  11
  12 int test_label_in_switch(int v) {
  13     switch (v) {
  14     case 1:
  15         return 1;
  16     case 2:
  17         return 2;
  18     case 3: case 4: case 5:
  19     } // c17-warning {{label at end of compound statement is a C23 extension}} \
  20          c2x-warning {{label at end of compound statement is incompatible with C standards before C23}}
  21
  22     switch (v) {
  23     case 6:
  24         return 6;
  25     default:
  26     } // c17-warning {{label at end of compound statement is a C23 extension}} \
  27          c2x-warning {{label at end of compound statement is incompatible with C standards before C23}}
  28
  29     return 0;
  30 }