Ability to change C module by mere file renaming (Lua 5.1)
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- Subject: Ability to change C module by mere file renaming (Lua 5.1)
- From: Asko Kauppi <askok@...>
- Date: 2005年11月28日 00:12:14 +0200
While it is possible for Lua modules (5.1) to be renamed simply by
renaming their carriage file, this is not directly so for C modules.
However, there is a mechanism described for being able to use two
versions of a same package at once ("require 'v1-mod'" loads "v1"
file but calls "luaopen_mod()").
Now, why make it so complicated? Why not just say, that in the
absence of "luaopen_myfilename()" function, a "luaopen_init()" (or
similar) will be called.
What was the reason behind making module initialization functions
carry the module name(space) anyhow? I think there is/was some, was
it the static building situation (linking a module statically with
the main Lua executable)? Is there any other reason for that behaviour?
With the "defaults to luaopen_init" I think the whole "-" notation
could be removed. It sounds potentially hazardous, I won't be able to
make a "sdl-mixer" submodule, would I?
-ak
(hoping the signal/noise is right on this one...:)