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// RUN: %clang_cc1 -fsyntax-only -verify %s -fblocks
void donotwarn();
int (^IFP) ();
int (^II) (int);
int test1() {
int (^PFR) (int) = 0; // OK
PFR = II; // OK
if (PFR == II) // OK
donotwarn();
if (PFR == IFP) // OK
donotwarn();
if (PFR == (int (^) (int))IFP) // OK
donotwarn();
if (PFR == 0) // OK
donotwarn();
if (PFR) // OK
donotwarn();
if (!PFR) // OK
donotwarn();
return PFR != IFP; // OK
}
int test2(double (^S)()) {
double (^I)(int) = (void*) S;
(void*)I = (void *)S; // expected-error {{assignment to cast is illegal, lvalue casts are not supported}}
void *pv = I;
pv = S;
I(1);
return (void*)I == (void *)S;
}
int^ x; // expected-error {{block pointer to non-function type is invalid}}
int^^ x1; // expected-error {{block pointer to non-function type is invalid}} expected-error {{block pointer to non-function type is invalid}}
void test3() {
char *^ y; // expected-error {{block pointer to non-function type is invalid}}
}
enum {NSBIRLazilyAllocated = 0};
int test4(int argc) { // rdar://6251437
^{
switch (argc) {
case NSBIRLazilyAllocated: // is an integer constant expression.
default:
break;
}
}();
return 0;
}
// rdar://6257721 - reference to static/global is byref by default.
static int test5g;
void test5() {
bar(^{ test5g = 1; });
}
// rdar://6405429 - __func__ in a block refers to the containing function name.
const char*test6() {
return ^{
return __func__;
} ();
}
// radr://6732116 - block comparisons
void (^test7a)();
int test7(void (^p)()) {
return test7a == p;
}
void test8() {
somelabel:
// FIXME: This should say "jump out of block not legal" when gotos are allowed.
^{ goto somelabel; }(); // expected-error {{goto not allowed in block literal}}
}
void test9() {
goto somelabel; // expected-error {{use of undeclared label 'somelabel'}}
^{ somelabel: ; }();
}
void test10(int i) {
switch (i) {
case 41: ;
^{ case 42: ; }(); // expected-error {{'case' statement not in switch statement}}
}
}
void test11(int i) {
switch (i) {
case 41: ;
^{ break; }(); // expected-error {{'break' statement not in loop or switch statement}}
}
for (; i < 100; ++i)
^{ break; }(); // expected-error {{'break' statement not in loop or switch statement}}
}
void (^test12f)(void);
void test12() {
test12f = ^test12f; // expected-error {{type name requires a specifier or qualifier}} expected-error {{expected expression}}
}
// rdar://6808730
void *test13 = ^{
int X = 32;
void *P = ^{
return X+4; // References outer block's "X", so outer block is constant.
};
};
void test14() {
int X = 32;
static void *P = ^{ // expected-error {{initializer element is not a compile-time constant}}
void *Q = ^{
// References test14's "X": outer block is non constant.
return X+4;
};
};
}
enum { LESS };
void foo(long (^comp)()) {
}
void (^test15f)(void);
void test15() {
foo(^{ return LESS; }); // expected-error {{incompatible block pointer types passing 'int (^)(void)', expected 'long (^)()'}}
}
__block int test16i; // expected-error {{__block attribute not allowed, only allowed on local variables}}
void test16(__block int i) { // expected-error {{__block attribute not allowed, only allowed on local variables}}
int size = 5;
extern __block double extern_var; // expected-error {{__block attribute not allowed, only allowed on local variables}}
static __block char * pch; // expected-error {{__block attribute not allowed, only allowed on local variables}}
__block int a[size]; // expected-error {{__block attribute not allowed on declaration with a variably modified type}}
__block int (*ap)[size]; // expected-error {{__block attribute not allowed on declaration with a variably modified type}}
}
void test17() {
void (^bp)(int);
void (*rp)(int);
void (^bp1)();
void *vp = bp;
f(1 ? bp : vp);
f(1 ? vp : bp);
f(1 ? bp : bp1);
(void)(bp > rp); // expected-error {{invalid operands}}
(void)(bp > 0); // expected-error {{invalid operands}}
(void)(bp > bp); // expected-error {{invalid operands}}
(void)(bp > vp); // expected-error {{invalid operands}}
f(1 ? bp : rp); // expected-error {{incompatible operand types ('void (^)(int)' and 'void (*)(int)')}}
(void)(bp == 1); // expected-error {{invalid operands to binary expression}}
(void)(bp == 0);
(void)(1 == bp); // expected-error {{invalid operands to binary expression}}
(void)(0 == bp);
(void)(bp < 1); // expected-error {{invalid operands to binary expression}}
(void)(bp < 0); // expected-error {{invalid operands to binary expression}}
(void)(1 < bp); // expected-error {{invalid operands to binary expression}}
(void)(0 < bp); // expected-error {{invalid operands to binary expression}}
}
void test18() {
void (^const blockA)(void) = ^{ };
blockA = ^{ }; // expected-error {{read-only variable is not assignable}}
}
// rdar://7072507
int test19() {
goto L0; // expected-error {{illegal goto into protected scope}}
__block int x; // expected-note {{jump bypasses setup of __block variable}}
L0:
x = 0;
^(){ ++x; }();
return x;
}
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