1// RUN: %clang_cc1 -Wno-int-to-pointer-cast -pedantic -fsyntax-only %s -verify -fblocks
2
3typedef void (^CL)(void);
4
5CL foo() {
6  short y;
7  short (^add1)(void) = ^{ return y+1; }; // expected-error {{incompatible block pointer types initializing 'short (^)(void)' with an expression of type 'int (^)(void)'}}
8
9  CL X = ^{
10    if (2)
11      return;
12    return 1;  // expected-error {{return type 'int' must match previous return type 'void' when block literal has unspecified explicit return type}}
13  };
14
15  int (^Y) (void)  = ^{
16    if (3)
17      return 1;
18    else
19      return; // expected-error {{return type 'void' must match previous return type 'int' when block literal has unspecified explicit return type}}
20  };
21
22  char *(^Z)(void) = ^{
23    if (3)
24      return "";
25    else
26      return (char*)0;
27  };
28
29  double (^A)(void) = ^ { // expected-error {{incompatible block pointer types initializing 'double (^)(void)' with an expression of type 'float (^)(void)'}}
30    if (1)
31      return (float)1.0;
32    else
33      if (2)
34        return (double)2.0; // expected-error {{return type 'double' must match previous return type 'float' when block literal has unspecified explicit return type}}
35    return 1; // expected-error {{return type 'int' must match previous return type 'float' when block literal has unspecified explicit return type}}
36  };
37  char *(^B)(void) = ^{
38    if (3)
39      return "";
40    else
41      return 2; // expected-error {{return type 'int' must match previous return type 'char *' when block literal has unspecified explicit return type}}
42  };
43
44  return ^{ return 1; }; // expected-error {{incompatible block pointer types returning 'int (^)(void)' from a function with result type 'CL' (aka 'void (^)(void)')}}
45}
46
47typedef int (^CL2)(void);
48
49CL2 foo2() {
50  return ^{ return 1; };
51}
52
53typedef unsigned int * uintptr_t;
54typedef char Boolean;
55typedef int CFBasicHash;
56
57#define INVOKE_CALLBACK2(P, A, B) (P)(A, B)
58
59typedef struct {
60    Boolean (^isEqual)(const CFBasicHash *, uintptr_t stack_value_or_key1, uintptr_t stack_value_or_key2, Boolean is_key);
61} CFBasicHashCallbacks;
62
63int foo3() {
64    CFBasicHashCallbacks cb;
65
66    Boolean (*value_equal)(uintptr_t, uintptr_t) = 0;
67
68    cb.isEqual = ^(const CFBasicHash *table, uintptr_t stack_value_or_key1, uintptr_t stack_value_or_key2, Boolean is_key) {
69      return (Boolean)(uintptr_t)INVOKE_CALLBACK2(value_equal, (uintptr_t)stack_value_or_key1, (uintptr_t)stack_value_or_key2);
70    };
71}
72
73static int funk(char *s) {
74  if (^{} == ((void*)0))
75    return 1;
76  else
77    return 0;
78}
79void next();
80void foo4() {
81  int (^xx)(const char *s) = ^(char *s) { return 1; }; // expected-error {{incompatible block pointer types initializing 'int (^)(const char *)' with an expression of type 'int (^)(char *)'}}
82  int (*yy)(const char *s) = funk; // expected-warning {{incompatible pointer types initializing 'int (*)(const char *)' with an expression of type 'int (char *)'}}
83
84  int (^nested)(char *s) = ^(char *str) { void (^nest)(void) = ^(void) { printf("%s\n", str); }; next(); return 1; }; // expected-warning{{implicitly declaring library function 'printf' with type 'int (const char *, ...)'}} \
85  // expected-note{{please include the header <stdio.h> or explicitly provide a declaration for 'printf'}}
86}
87
88typedef void (^bptr)(void);
89
90bptr foo5(int j) {
91  __block int i;
92  if (j)
93    return ^{ ^{ i=0; }(); };  // expected-error {{returning block that lives on the local stack}}
94  return ^{ i=0; };  // expected-error {{returning block that lives on the local stack}}
95  return (^{ i=0; });  // expected-error {{returning block that lives on the local stack}}
96  return (void*)(^{ i=0; });  // expected-error {{returning block that lives on the local stack}}
97}
98
99int (*funcptr3[5])(long);
100int sz8 = sizeof(^int (*[5])(long) {return funcptr3;}); // expected-error {{block cannot return array type}} expected-warning {{incompatible pointer to integer conversion}}
101int sz9 = sizeof(^int(*())()[3]{ }); // expected-error {{function cannot return array type}}
102
103void foo6() {
104  int (^b)(int) __attribute__((noreturn));
105  b = ^ (int i) __attribute__((noreturn)) { return 1; };  // expected-error {{block declared 'noreturn' should not return}}
106  b(1);
107  int (^c)(void) __attribute__((noreturn)) = ^ __attribute__((noreturn)) { return 100; }; // expected-error {{block declared 'noreturn' should not return}}
108}
109
110
111void foo7()
112{
113 const int (^BB) (void) = ^{ const int i = 1; return i; }; // OK - initializing 'const int (^)(void)' with an expression of type 'int (^)(void)'
114
115 const int (^CC) (void)  = ^const int{ const int i = 1; return i; };
116
117
118  int i;
119  int (^FF) (void)  = ^{ return i; }; // OK
120  int (^EE) (void)  = ^{ return i+1; }; // OK
121
122  __block int j;
123  int (^JJ) (void)  = ^{ return j; }; // OK
124  int (^KK) (void)  = ^{ return j+1; }; // OK
125
126  __block const int k;
127  const int cint = 100;
128
129  int (^MM) (void)  = ^{ return k; };
130  int (^NN) (void)  = ^{ return cint; };
131}
132
133// rdar://11069896
134void (^blk)(void) = ^{
135    return (void)0; // expected-warning {{void block literal should not return void expression}}
136};
137
138// rdar://13463504
139enum Test8 { T8_a, T8_b, T8_c };
140void test8(void) {
141  extern void test8_helper(int (^)(int));
142  test8_helper(^(int flag) { if (flag) return T8_a; return T8_b; });
143}
144void test8b(void) {
145  extern void test8_helper2(char (^)(int)); // expected-note {{here}}
146  test8_helper2(^(int flag) { if (flag) return T8_a; return T8_b; }); // expected-error {{passing 'enum Test8 (^)(int)' to parameter of type 'char (^)(int)'}}
147}
148