http://llvm.org/bugs/show_bug.cgi?id=13701
Bug #: 13701
Summary: Boxing untyped enum produces different number size
Product: clang
Version: 3.1
Platform: Macintosh
OS/Version: MacOS X
Status: NEW
Severity: enhancement
Priority: P
Component: -New Bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Classification: Unclassified
Here is a sample code I used to reproduce the issue:
typedef enum _MyEnum {
MyEnumMember1 = 1000
} MyEnum;
- (void)testEnumerationBoxing
{
NSNumber *numberA = [self testA];
NSNumber *numberB = [self testB:MyEnumMember1];
CFNumberType numberTypeA = CFNumberGetType((__bridge CFNumberRef) numberA);
CFNumberType numberTypeB = CFNumberGetType((__bridge CFNumberRef) numberB);
}
- (NSNumber *)testA
{
return @(MyEnumMember1);
}
- (NSNumber *)testB:(MyEnum)enumMember
{
return @(enumMember);
}
Expected result:
numberTypeA should be the same as numberTypeB
Actual result:
numberTypeA is reported to be a 32 bit number while numberTypeB is a 64 bit
number
Note:
When enum defined as "typedef enum _MyEnum : int" both results are the same
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