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- Subject: Re: Lua 5.2 - emulation of old setfenv
- From: Dirk Laurie <dpl@...>
- Date: Thu, 6 Jan 2011 09:17:52 +0200
On Thu, Jan 06, 2011 at 07:56:58AM +0200, Miles Bader wrote:
> Lorenzo Donati <firstname.lastname@example.org> writes:
> First step: what's the best way to detect one is running in 5.2?
> I can do:
> local lua_52 = string.match(_VERSION, " 5[.]2$")
> but my impression is that such version-string matching is often thought
> of as being not-so-good (e.g., the above will fail in 5.3 or 6.0, even
> though they're likely to be more like 5.2 than 5.1).
local lua_version = tonumber(string.match(_VERSION,'%d*%.%d*'))
will allow the test
if lua_version >= tonumber('5.2') then -- etc