Re: Pre-Scheme static allocation

Thomas Hintz <[email protected]> writes:

> On Wed, Oct 28, 2015, at 01:03 AM, Michael Sperber wrote:
>> But what you're trying to do still seems odd to me - maybe you can
>> provide a little bit more background on why you're trying to do this?
>> (I.e. why not just `(string-ref "hello-world" 0)`.)
>
> In this case I would like to keep a buffer of characters that are being
> displayed on the screen. So I need to be able to do operations like
> "string-ref" and "string-set!" on that buffer. But if I try to do this:
>
> (let ((buf "000000"))
>   (string-set! buf 0 #\a)
>   (string-ref buf 0))
>
> the pre-scheme compiler inlines 'buf', which obviously is not what I
> want.

Primarily because it's not valid Scheme: The literal is read-only.  I
think what you should do is just a regular buffer, and, if you want to
transfer contents from a literal string, do so explicitly.

-- 
Regards,
Mike