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Start emitting stubs for unimplemented designated initializers of the superclass.

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When a subclass does not implement a designated initializer of its
superclass, introduce a stub initializer that simply traps. Such stubs
cannot be invoked directly using Swift syntax, but can be invoked
through the Objective-C runtime and from Objective-C code. Catch such
errors rather than allowing them to violate the memory safety of the
language.

Note that we're currently using cond_fail to trap; this will be
improved in the future,


Swift SVN r14839
This commit is contained in:
Doug Gregor
2014-03-09 07:16:30 +00:00
parent c92f159a8f
commit 00162dc243
10 changed files with 306 additions and 80 deletions
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5
test/SILGen/Inputs/usr/include/Gizmo.h
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@@ -14,6 +14,7 @@
#define NS_RETURNS_RETAINED __attribute__((ns_returns_retained))
#define NS_CONSUMES_SELF __attribute__((ns_consumes_self))
#define NS_CONSUMED __attribute__((ns_consumed))
#define OBJC_DESIGNATED_INITIALIZER __attribute__((objc_designated_initializer))
struct Rect {
float x;
@@ -38,7 +39,9 @@ typedef long NSInteger;
@interface Gizmo : NSObject
- (Gizmo*) clone NS_RETURNS_RETAINED;
- (Gizmo*) duplicate;
- (Gizmo*) initWithBellsOn:(NSInteger)x;
- (Gizmo*) init OBJC_DESIGNATED_INITIALIZER;
- (Gizmo*) initWithBellsOn:(NSInteger)x OBJC_DESIGNATED_INITIALIZER;
- (instancetype) initWithoutBells:(NSInteger)x;
- (void) fork NS_CONSUMES_SELF;
- (void) enumerateSubGizmos: (void (^)(Gizmo*))f;
+ (void) consume: (NS_CONSUMED Gizmo*) gizmo;