1// RUN: %clang_cc1 -verify -fblocks -cl-std=CL2.0 %s
2
3// OpenCL v2.0 s6.12.5
4void f0(int (^const bl)());
5// All blocks declarations must be const qualified and initialized.
6void f1() {
7  int (^bl1)() = ^() {return 1;};
8  int (^const bl2)() = ^(){return 1;};
9  f0(bl1);
10  f0(bl2);
11  bl1 = bl2; // expected-error{{invalid operands to binary expression ('int (^const)()' and 'int (^const)()')}}
12  int (^const bl3)(); // expected-error{{invalid block variable declaration - must be initialized}}
13}
14
15// A block with extern storage class is not allowed.
16extern int (^bl)() = ^(){return 1;}; // expected-error{{invalid block variable declaration - using 'extern' storage class is disallowed}}
17void f2() {
18  extern int (^bl)() = ^(){return 1;}; // expected-error{{invalid block variable declaration - using 'extern' storage class is disallowed}}
19}
20
21// A block cannot be the return value of a function.
22typedef int (^bl_t)(void);
23bl_t f3(bl_t bl); // expected-error{{declaring function return value of type 'bl_t' (aka 'int (^const)(void)') is not allowed}}
24
25struct bl_s {
26  int (^bl)(void); // expected-error {{the 'int (^const)(void)' type cannot be used to declare a structure or union field}}
27};
28
29void f4() {
30  __block int a = 10; // expected-error {{the __block storage type is not permitted}}
31}
32
33// A block with variadic argument is not allowed.
34int (^bl)(int, ...) = ^int(int I, ...) { // expected-error {{invalid block prototype, variadic arguments are not allowed in OpenCL}}
35  return 0;
36};
37
38// A block can't be used to declare an array
39typedef int (^bl1_t)(int);
40void f5(int i) {
41  bl1_t bl1 = ^(int i) {return 1;};
42  bl1_t bl2 = ^(int i) {return 2;};
43  bl1_t arr[] = {bl1, bl2}; // expected-error {{array of 'bl1_t' (aka 'int (^const)(int)') type is invalid in OpenCL}}
44  int tmp = i ? bl1(i)      // expected-error {{block type cannot be used as expression in ternary expression in OpenCL}}
45              : bl2(i);     // expected-error {{block type cannot be used as expression in ternary expression in OpenCL}}
46}
47// A block pointer type and all pointer operations are disallowed
48void f6(bl1_t * bl_ptr) { // expected-error{{pointer to type '__generic bl1_t' (aka 'int (^const __generic)(int)') is invalid in OpenCL}}
49  bl1_t bl = ^(int i) {return 1;};
50  bl1_t *p; // expected-error {{pointer to type '__generic bl1_t' (aka 'int (^const __generic)(int)') is invalid in OpenCL}}
51  *bl;  // expected-error {{invalid argument type 'bl1_t' (aka 'int (^const)(int)') to unary expression}}
52  &bl; // expected-error {{invalid argument type 'bl1_t' (aka 'int (^const)(int)') to unary expression}}
53}
54