demerphq wrote:
> We already do.

I ran into PAD_MAX having changed between 5.8.8 and 5.8.9.  Now, that
constant wasn't even defined in a header, it's only defined in pad.c, but
the value is effectively part of the pad API.  That's one of the things
that's currently considered non-public, but seriously needs a public API.

(The module in question is Lexical::Var, and I ended up with this logic:

	static PADOFFSET pad_max(void)
	{
	#if PERL_VERSION_GE(5,9,5)
		return I32_MAX;
	#elif PERL_VERSION_GE(5,9,0)
		return 999999999;
	#elif PERL_VERSION_GE(5,8,0)
		static PADOFFSET max;
		if(!max) {
			SV *versv = get_sv("]", 0);
			char *verp = SvPV_nolen(versv);
			max = strGE(verp, "5.008009") ? I32_MAX : 999999999;
		}
		return max;
	#else /* <5.8.0 */
		return 999999999;
	#endif /* <5.8.0 */
	}

Fun, eh.)

-zefram