This is the most general dynamic cast operation, permitting
arbitary source and destination types and handling arbitrary
changes in representation. A value of the destination type
is constructed in an address provided by the caller; flags
control the behavior w.r.t. the source value.
Not yet used; probably buggy in various particulars.
Swift SVN r18815
Prior to this fix this would fail:
(swift) import Foundation
(swift) extension NSDate { func foo() { println("foo") }}
As the Class for NSDate was not initialized.
<rdar://problem/16934080>
Swift SVN r18206
Huge allocation leaks are detected correctly.
Tiny allocation leaks are problematic, both false positive and false negative.
For example:
leaks Report Version: 2.0
Process 73345: 4980 nodes malloced for 1677 KB
Process 73345: 1 leak for 1048576 total leaked bytes.
Leak: 0x10aed0000 size=1048576 zone: SwiftZone_0x10adc35d8
Swift SVN r18007
