From: Daniel Berger <djberg96@...>
Date: 2005-12-11T01:02:54+09:00
Subject: Re: rb_str_replace not public?

Harpo wrote:
> Daniel Berger wrote:
>
> > Hi all,
>
> Hi,
>
> >
> > I wanted to use rb_str_replace for a destructive method in a C
> > extension I'm using.  However, it doesn't appear to be public.  Why
> > not?  And what should I use instead?
> >
> > I poked around intern.h a bit, and saw a few potential candidates, but
> > wasn't sure if there was a suitable replacement.  I suppose I could
> > use rb_funcall, but that seems wrong, given that I know rb_str_replace
> > exists in string.c.
>
> Why not simply :
>
> VALUE str1;     // string to replace
> VALUE str2;     // replacement string
>
> str1 = str2;
> [ or, if you want a different object ]
> str1 = rb_str_dup( str2 );
>
> Maybe I missed something...

In my case I need to replace 'self' within a subclass of String, so I
don't want to dup and I can't do a direct assignment:

irb(main):001:0> class Foo < String; def test; self = "hello"; end; end
SyntaxError: compile error
(irb):1: Can't change the value of self
class Foo < String; def test; self = "hello"; end; end

Thus, I cheat by using String#replace. :)

For now I guess I'll just use rb_funcall, which seems to work fine.

Regards,

Dan