[Date Prev][Date Next][Thread Prev][Thread Next]
- Subject: Re: suggestion: LUA_VER >= 5.103
- From: Mike Pall <mikelu-0501@...>
- Date: Mon, 17 Jan 2005 01:39:50 +0100
Asko Kauppi wrote:
> Is there a reason why Lua engine's version is not clearly (for the
> machine) available in a constant s.a.
> LUA_VER= 5.104
Make this 5.0100 = 5.01.00. Work versions are comparable to CVS versions
in other software projects and usually get either the next or the previous
release number (using the next release makes more sense IMHO).
> This would be useful for scripts that intend to be version independent.
> Now, they need to parse '_VERSION' ("Lua 5.1 (work4)") and there's no
> guarantee the format of that will remain as is?
I second this. Having a printable _VERSION is nice (but rarely used).
Having a number is much more useful. Since it has been stated quite
explicitly that the API may change across Lua versions, scripts need
a way to account for the differences.
I'd like to have such a number both for the Lua side (a global number)
and for the C side (a #define in lua.h).
Actually I suggested the latter as part of my cumulative loadlib patch:
> Add a version define that allows for stuff like:
> #if defined(LUA_VERSION_NUM) && LUA_VERSION_NUM >= 0x050100L
> Note that prerelease ("work") versions need to be tagged with the release
> version they are destined for ("5.1.0" -> 0x050100L).
> NB: It needs to be a long constant to account for 16 bit systems.
> --- lua-5.1-work3/include/lua.h
> +#define LUA_VERSION_NUM 0x050100L
Alas, this change was not merged into 5.1w4.
I think an issue tracker would help keeping track which changes were merged,
were refused, became obsolete or whatever ...