[Openmcl-devel] Snow Leopard snafu

[R. Matthew Emerson]

On Sep 1, 2009, at 12:59 PM, Ron Garret wrote:

> Oh blarg, this doesn't work either:
>
> ? (make-instance gui::ns-lisp-string :with-string (coerce "foo"
> 'simple-base-string))
>> Error: value "foo" is not of the expected type (OR MACPTR NULL).
>
> So let me just ask: what is the Right Way to convert a Lisp string to
> an NSString nowadays?

There's the (unexported) macro CCL::WITH-AUTORELEASED-NSSTRINGS, that  
works like this:

(ccl::with-autoreleased-nsstrings ((s1 "foo") (s2 "bar"))
   (#/initWithObjects: (#/alloc ns:ns-array) s1 s2 +null-ptr+))

This is somewhat nicer than fiddling with %MAKE-NSSTRING.  (And it's  
analogous to macros such as WITH-ENCODED-CSTRS and so forth that are  
part of documented CCL.)

I would have exported it, but I'm not sure what package it should go  
in, and whether it should really be WITH-CFSTRINGS.