Re: Using CFSTR() with const char * variable
Re: Using CFSTR() with const char * variable
- Subject: Re: Using CFSTR() with const char * variable
- From: Jean-Daniel Dupas <email@hidden>
- Date: Mon, 08 Jun 2015 07:16:31 +0200
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 <email@hidden> 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 <email@hidden> 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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