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      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() {
      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() {
     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() {
     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() {
     81   __if_exists(Type) {
     82     int x = 42;
     83     __if_not_exists(Type_not) {
     84       x++;
     85     }
     86   }
     87 }
     88