137 lines
4.9 KiB
C
137 lines
4.9 KiB
C
// RUN: %clang_cc1 -pedantic -fsyntax-only %s -verify -fblocks
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typedef void (^CL)(void);
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CL foo() {
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short y;
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short (^add1)(void) = ^{ return y+1; }; // expected-error {{incompatible block pointer types initializing 'short (^)(void)' with an expression of type 'int (^)(void)'}}
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CL X = ^{
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if (2)
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return;
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return 1; // expected-error {{return type 'int' must match previous return type 'void' when block literal has unspecified explicit return type}}
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};
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int (^Y) (void) = ^{
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if (3)
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return 1;
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else
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return; // expected-error {{return type 'void' must match previous return type 'int' when block literal has unspecified explicit return type}}
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};
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char *(^Z)(void) = ^{
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if (3)
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return "";
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else
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return (char*)0;
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};
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double (^A)(void) = ^ { // expected-error {{incompatible block pointer types initializing 'double (^)(void)' with an expression of type 'float (^)(void)'}}
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if (1)
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return (float)1.0;
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else
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if (2)
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return (double)2.0; // expected-error {{return type 'double' must match previous return type 'float' when block literal has unspecified explicit return type}}
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return 1; // expected-error {{return type 'int' must match previous return type 'float' when block literal has unspecified explicit return type}}
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};
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char *(^B)(void) = ^{
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if (3)
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return "";
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else
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return 2; // expected-error {{return type 'int' must match previous return type 'char *' when block literal has unspecified explicit return type}}
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};
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return ^{ return 1; }; // expected-error {{incompatible block pointer types returning 'int (^)(void)' from a function with result type 'CL' (aka 'void (^)(void)')}}
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}
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typedef int (^CL2)(void);
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CL2 foo2() {
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return ^{ return 1; };
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}
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typedef unsigned int * uintptr_t;
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typedef char Boolean;
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typedef int CFBasicHash;
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#define INVOKE_CALLBACK2(P, A, B) (P)(A, B)
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typedef struct {
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Boolean (^isEqual)(const CFBasicHash *, uintptr_t stack_value_or_key1, uintptr_t stack_value_or_key2, Boolean is_key);
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} CFBasicHashCallbacks;
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int foo3() {
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CFBasicHashCallbacks cb;
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Boolean (*value_equal)(uintptr_t, uintptr_t) = 0;
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cb.isEqual = ^(const CFBasicHash *table, uintptr_t stack_value_or_key1, uintptr_t stack_value_or_key2, Boolean is_key) {
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return (Boolean)(uintptr_t)INVOKE_CALLBACK2(value_equal, (uintptr_t)stack_value_or_key1, (uintptr_t)stack_value_or_key2);
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};
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}
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static int funk(char *s) {
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if (^{} == ((void*)0))
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return 1;
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else
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return 0;
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}
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void next();
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void foo4() {
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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 *)'}}
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int (*yy)(const char *s) = funk; // expected-warning {{incompatible pointer types initializing 'int (*)(const char *)' with an expression of type 'int (char *)'}}
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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 *, ...)'}} \
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// expected-note{{please include the header <stdio.h> or explicitly provide a declaration for 'printf'}}
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}
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typedef void (^bptr)(void);
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bptr foo5(int j) {
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__block int i;
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if (j)
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return ^{ ^{ i=0; }(); }; // expected-error {{returning block that lives on the local stack}}
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return ^{ i=0; }; // expected-error {{returning block that lives on the local stack}}
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return (^{ i=0; }); // expected-error {{returning block that lives on the local stack}}
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return (void*)(^{ i=0; }); // expected-error {{returning block that lives on the local stack}}
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}
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int (*funcptr3[5])(long);
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int sz8 = sizeof(^int (*[5])(long) {return funcptr3;}); // expected-error {{block cannot return array type}} expected-warning {{incompatible pointer to integer conversion}}
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int sz9 = sizeof(^int(*())()[3]{ }); // expected-error {{function cannot return array type}}
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void foo6() {
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int (^b)(int) __attribute__((noreturn));
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b = ^ (int i) __attribute__((noreturn)) { return 1; }; // expected-error {{block declared 'noreturn' should not return}}
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b(1);
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int (^c)(void) __attribute__((noreturn)) = ^ __attribute__((noreturn)) { return 100; }; // expected-error {{block declared 'noreturn' should not return}}
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}
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void foo7()
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{
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const int (^BB) (void) = ^{ const int i = 1; return i; }; // OK - initializing 'const int (^)(void)' with an expression of type 'int (^)(void)'
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const int (^CC) (void) = ^const int{ const int i = 1; return i; };
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int i;
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int (^FF) (void) = ^{ return i; }; // OK
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int (^EE) (void) = ^{ return i+1; }; // OK
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__block int j;
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int (^JJ) (void) = ^{ return j; }; // OK
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int (^KK) (void) = ^{ return j+1; }; // OK
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__block const int k;
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const int cint = 100;
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int (^MM) (void) = ^{ return k; };
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int (^NN) (void) = ^{ return cint; };
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}
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// rdar://11069896
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void (^blk)(void) = ^{
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return (void)0; // expected-warning {{void block literal should not return void expression}}
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};
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