On Sat, May 22, 2004 at 09:23:34PM +0000 Erland Sommarskog wrote:
> I realized that I wanted to find out in my XS module whether an input
> parameter was readonly or not. I was browsing perlapi.html, but could
> find any function.
>
> Searching Google, I soon found that SvREADONLY(sv) would do the task,
> and it runs fine with ActiveState build 809.
>
> But the only reference in perlapi.html is in passing under sv_magicext.
> I don't really like using undocumented functions. So is SvREADONLY
> supported? Deprecated? Should I use something else?
No, SvREADONLY is totally ok. The question whether a macro or function
is documented in perlapi.pod isn't usually a strong indication for
anything. perlapi is far from complete. I think many of the XS authors
have fallen into the habit of having the perl source at hand and looking
up things in there, and thus short-circuiting perlapi.
Tassilo
--
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