Re: [Beaver-devel] str_replace_tokens

[Michael Terry]

Leslie Polzer wrote:
> > The reason is so that I can write
> > str_replace_tokens (&str, 'l', "hi");
> >
> > instead of
> > str = str_replace_tokens (str, 'l', "hi");
>
> Huh? But it'd be possible alright to write
>
>         str_replace_tokens (str, 'l', "hi");
>
> too, wouldn't it?
> Of course only if the ** was a *.

No, you couldn't.  C passes things by value, so if you did it with one 
*, you would merely get a copy of the calling function's pointer.  You 
wouldn't be able to change the actual calling function's pointer.

Think of it like this: if you wanted to actually change the value of an 
int, you would use int *.  Since we want to change the value of a gchar 
*, we use gchar **.

-mt

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