clang/test/Parser/ms-if-exists.c

   1 // RUN: %clang_cc1 %s -fsyntax-only -Wmicrosoft -verify -fms-extensions
   2 // expected-no-diagnostics
   3
   4 struct Type {
   5 };
   6
   7 void test_if_exists_stmts(void) {
   8   int b = 0;
   9   __if_exists(Type) {
  10     b++;
  11     b++;
  12   }
  13   __if_exists(Type_not) {
  14     this will not compile.
  15   }
  16   __if_not_exists(Type) {
  17     this will not compile.
  18   }
  19   __if_not_exists(Type_not) {
  20     b++;
  21     b++;
  22   }
  23 }
  24
  25 int if_exists_creates_no_scope(void) {
  26   __if_exists(Type) {
  27     int x;  // 'x' is declared in the parent scope.
  28   }
  29   __if_not_exists(Type_not) {
  30     x++;
  31   }
  32   return x;
  33 }
  34
  35 __if_exists(Type) {
  36   int var23;
  37 }
  38
  39 __if_exists(Type_not) {
  40   this will not compile.
  41 }
  42
  43 __if_not_exists(Type) {
  44   this will not compile.
  45 }
  46
  47 __if_not_exists(Type_not) {
  48   int var244;
  49 }
  50
  51 void test_if_exists_init_list(void) {
  52
  53   int array1[] = {
  54     0,
  55     __if_exists(Type) {2, }
  56     3
  57   };
  58
  59   int array2[] = {
  60     0,
  61     __if_exists(Type_not) { this will not compile }
  62     3
  63   };
  64
  65   int array3[] = {
  66     0,
  67     __if_not_exists(Type_not) {2, }
  68     3
  69   };
  70
  71   int array4[] = {
  72     0,
  73     __if_not_exists(Type) { this will not compile }
  74     3
  75   };
  76
  77 }
  78
  79
  80 void test_nested_if_exists(void) {
  81   __if_exists(Type) {
  82     int x = 42;
  83     __if_not_exists(Type_not) {
  84       x++;
  85     }
  86   }
  87 }