That’s not going to work.
__builtin___CFStringMakeConstantString is a special compiler function that
requires a constant string to work in the first place, as it tells the compiler
to generate CFString literal.
I doubt the compiler will accept anything else as parameter.
> Le 7 juin 2015 à 03:39, Steve Christensen <puns...@mac.com> a écrit :
>
> In my prefix file that is used to build precompiled headers, I include the
> following after #import-ing all the framework headers. It replaces the
> standard definition with a version that doesn't insert quotes around an
> unquoted string literal.
>
> #undef CFSTR//(cStr)
> #ifdef __CONSTANT_CFSTRINGS__
> #define CFSTR(cStr) ((CFStringRef)
> __builtin___CFStringMakeConstantString(cStr))
> #else
> #define CFSTR(cStr) __CFStringMakeConstantString(cStr)
> #endif
>
>
>
>> On Jun 5, 2015, at 8:02 PM, Carl Hoefs <newsli...@autonomy.caltech.edu>
>> wrote:
>>
>> If I use CFSTR() in the following way:
>> CFStringRef mystr = CFSTR( "This is a string" );
>> there is no problem.
>>
>> However, if I use a variable instead of “string” Xcode flags this as an
>> error:
>> const char *mystring = "This is a string";
>> CFStringRef mystr = CFSTR( mystring );
>> ^ <— Expected ")"
>>
>> In CFString.h, CFSTR is defined as:
>> #define CFSTR(cStr) __CFStringMakeConstantString("" cStr "")
>>
>> Is it possible to use CFSTR() with a const char * variable?
>>
>> Xcode 6.3.2
>> -Carl
>
>
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