ccc4d83cda
pointer types.
For example, in Objective-C mode, the initialization of 'x' in:
```
@implementation MyType
+ (void)someClassMethod {
MyType *x = self;
}
@end
```
is correctly diagnosed with an incompatible-pointer-types warning, but
in Objective-C++ mode, it is not diagnosed at all -- even though
incompatible pointer conversions generally become an error in C++.
This patch fixes that oversight, allowing implicit conversions
involving Class only to/from unqualified-id, and between qualified and
unqualified Class, where the protocols are compatible.
Note that this does change some behaviors in Objective-C, as well, as
shown by the modified tests.
Of particular note is that assignment from from 'Class<MyProtocol>' to
'id<MyProtocol>' now warns. (Despite appearances, those are not
compatible types. 'Class<MyProtocol>' is not expected to have instance
methods defined by 'MyProtocol', while 'id<MyProtocol>' is.)
Differential Revision: https://reviews.llvm.org/D67983
llvm-svn: 375125
26 lines
547 B
Plaintext
26 lines
547 B
Plaintext
// RUN: %clang_cc1 -verify -Wno-objc-root-class %s
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@interface XX
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- (void)addObserver:(XX*)o; // expected-note 2{{passing argument to parameter 'o' here}}
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@end
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@interface YY
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+ (void)classMethod;
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@end
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@implementation YY
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static XX *obj;
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+ (void)classMethod {
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[obj addObserver:self]; // expected-error {{cannot initialize a parameter of type 'XX *' with an lvalue of type 'Class'}}
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Class whatever;
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[obj addObserver:whatever]; // expected-error {{cannot initialize a parameter of type 'XX *' with an lvalue of type 'Class'}}
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}
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@end
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