}
}
- // Under ARC, bridged casts can have side-effects on memory
- // management semantics. Some users assign a bridged
- // value to a temporary to adjust reference counts.
+ // Under ARC, some users use __bridge_transfer to automate memory
+ // reclamation of objects that were referenced via C pointers.
const Expr *Init = VD->getInit();
if (Init) {
if (const ExprWithCleanups *EC = dyn_cast<ExprWithCleanups>(Init))
Init = EC->getSubExpr();
Init = Init->IgnoreParens();
- if (const ImplicitCastExpr *IC = dyn_cast<ImplicitCastExpr>(Init)) {
- switch (IC->getCastKind()) {
- case CK_ARCProduceObject:
- case CK_ARCConsumeObject:
- case CK_ARCReclaimReturnedObject:
- case CK_ARCExtendBlockObject:
- case CK_CopyAndAutoreleaseBlockObject:
+ if (const ImplicitCastExpr *IC = dyn_cast<ImplicitCastExpr>(Init))
+ if (IC->getCastKind() == CK_ARCConsumeObject)
return false;
- default:
- break;
- }
- }
}
// TODO: __attribute__((unused)) templates?
}
// <rdar://problem/15432770>
-// Suppressed -Wunused-variable when the initializer is a bridge cast.
+// Suppressed -Wunused-variable when the initializer is a __bridge_transfer cast.
#pragma clang diagnostic push
#pragma clang diagnostic warning "-Wunused-variable"
-void rdar15432770() {
- void (^block1)() = ^ { };
- void *ptr = (__bridge_retained void *)(block1);
- void (^block2)() = (__bridge_transfer void(^)())ptr; // no-warning
- int x = 1; // expected-warning {{unused variable}}
+void rdar15432770_ptr_release(const void *ptr) {
+ void (^block)() = (__bridge_transfer void(^)())ptr; // no-warning
+ // Test that warning is active.
+ int x = 1; // expected-warning {{unused}}
}
#pragma clang diagnostic pop