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      1 // RUN: %clang_cc1 -rewrite-objc %s -fblocks -o -
      2 
      3 void I( void (^)(void));
      4 void (^noop)(void);
      5 
      6 void nothing();
      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() {
     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() {
     27   int x = 4;
     28 
     29   takeblock(^{ printf("%d\n", x); });
     30 
     31   while (1) {
     32     takeblock(^{
     33         while(1) break;  // ok
     34       });
     35     break;
     36   }
     37 }
     38 
     39 
     40 void (^test3())(void) {
     41   return ^{};
     42 }
     43 
     44 void test4() {
     45   void (^noop)(void) = ^{};
     46   void (*noop2)() = 0;
     47 }
     48 
     49 void myfunc(int (^block)(int)) {}
     50 
     51 void myfunc3(const int *x);
     52 
     53 void test5() {
     54   int a;
     55 
     56   myfunc(^(int abcd) {
     57       myfunc3(&a);
     58       return 1;
     59     });
     60 }
     61 
     62 void *X;
     63 
     64 void test_arguments() {
     65   int y;
     66   int (^c)(char);
     67   (1 ? c : 0)('x');
     68   (1 ? 0 : c)('x');
     69 
     70   (1 ? c : c)('x');
     71 }
     72 
     73 static int global_x = 10;
     74 void (^global_block)(void) = ^{ printf("global x is %d\n", global_x); };
     75 
     76 typedef void (^void_block_t)(void);
     77 
     78 static const void_block_t myBlock = ^{ };
     79 
     80 static const void_block_t myBlock2 = ^ void(void) { };
     81