1 | // RUN: %clang_cc1 -Wno-int-to-pointer-cast -pedantic -fsyntax-only %s -verify -fblocks |
2 | |
3 | typedef void (^CL)(void); |
4 | |
5 | CL 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 | |
47 | typedef int (^CL2)(void); |
48 | |
49 | CL2 foo2() { |
50 | return ^{ return 1; }; |
51 | } |
52 | |
53 | typedef unsigned int * uintptr_t; |
54 | typedef char Boolean; |
55 | typedef int CFBasicHash; |
56 | |
57 | #define INVOKE_CALLBACK2(P, A, B) (P)(A, B) |
58 | |
59 | typedef struct { |
60 | Boolean (^isEqual)(const CFBasicHash *, uintptr_t stack_value_or_key1, uintptr_t stack_value_or_key2, Boolean is_key); |
61 | } CFBasicHashCallbacks; |
62 | |
63 | int 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 | |
73 | static int funk(char *s) { |
74 | if (^{} == ((void*)0)) |
75 | return 1; |
76 | else |
77 | return 0; |
78 | } |
79 | void next(); |
80 | void 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{{include the header <stdio.h> or explicitly provide a declaration for 'printf'}} |
86 | } |
87 | |
88 | typedef void (^bptr)(void); |
89 | |
90 | bptr 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 | |
99 | int (*funcptr3[5])(long); |
100 | int sz8 = sizeof(^int (*[5])(long) {return funcptr3;}); // expected-error {{block cannot return array type}} expected-warning {{incompatible pointer to integer conversion}} |
101 | int sz9 = sizeof(^int(*())()[3]{ }); // expected-error {{function cannot return array type}} |
102 | |
103 | void 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 | |
111 | void 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 |
134 | void (^blk)(void) = ^{ |
135 | return (void)0; // expected-warning {{void block literal should not return void expression}} |
136 | }; |
137 | |
138 | // rdar://13463504 |
139 | enum Test8 { T8_a, T8_b, T8_c }; |
140 | void test8(void) { |
141 | extern void test8_helper(int (^)(int)); |
142 | test8_helper(^(int flag) { if (flag) return T8_a; return T8_b; }); |
143 | } |
144 | void 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 | |