clang/test/Sema/block-literal.c

   1 // RUN: %clang_cc1 -fsyntax-only %s -verify -fblocks
   2
   3 void I( void (^)(void));
   4 void (^noop)(void);
   5
   6 void nothing(void);
   7 int printf(const char*, ...);
   8
   9 typedef void (^T) (void);
  10
  11 void takeblock(T);
  12 int takeintint(int (^C)(int)) { return C(4); }
  13
  14 T somefunction(void) {
  15   if (^{ })
  16     nothing();
  17
  18   noop = ^{};
  19
  20   noop = ^{printf("\nClosure\n"); };
  21
  22   I(^{ });
  23
  24   return ^{printf("\nClosure\n"); };
  25 }
  26 void test2(void) {
  27   int x = 4;
  28
  29   takeblock(^{ printf("%d\n", x); });
  30
  31   while (1) {
  32     takeblock(^{
  33         break;  // expected-error {{'break' statement not in loop or switch statement}}
  34         continue; // expected-error {{'continue' statement not in loop statement}}
  35         while(1) break;  // ok
  36         goto foo; // expected-error {{use of undeclared label 'foo'}}
  37         a: goto a;       // ok
  38       });
  39     break;
  40   }
  41
  42   foo:
  43   takeblock(^{ x = 4; });  // expected-error {{variable is not assignable (missing __block type specifier)}}
  44   __block y = 7;    // expected-error {{type specifier missing, defaults to 'int'}}
  45   takeblock(^{ y = 8; });
  46 }
  47
  48
  49 void (^test3(void))(void) {
  50   return ^{};
  51 }
  52
  53 void test4(void) {
  54   void (^noop)(void) = ^{};
  55   void (*noop2)(void) = 0;
  56 }
  57
  58 void myfunc(int (^block)(int)) {}
  59
  60 void myfunc3(const int *x);
  61
  62 void test5(void) {
  63   int a;
  64
  65   myfunc(^(int abcd) {
  66       myfunc3(&a);
  67       return 1;
  68     });
  69 }
  70
  71 void *X;
  72
  73 void test_arguments(void) {
  74   int y;
  75   int (^c)(char);
  76   (1 ? c : 0)('x');
  77   (1 ? 0 : c)('x');
  78
  79   (1 ? c : c)('x');
  80 }
  81
  82 static int global_x = 10;
  83 void (^global_block)(void) = ^{ printf("global x is %d\n", global_x); };
  84
  85 typedef void (^void_block_t)(void);
  86
  87 static const void_block_t myBlock = ^{ };
  88
  89 static const void_block_t myBlock2 = ^ void(void) { };