On 9/5/2015 10:39 PM, Kalrish Bäakjen wrote:
Why can't arbitrary code be byte-compiled? Is what you refer to
related to what's mentioned in the LuaTeX Reference Manual (see
below)?
Section 4.8.1 (LUA bytecode registers)
Note: The function must not contain any upvalues. Currently, functions
containing upvalues can be stored (and their upvalues are set to nil), but this
is an artifact of the current Lua implementation and thus subject to change.
I had been wondering what the consequences of this were.
It means that you have to make sure that you initialize your code
properly as you cannot assume upvalues to be saved for you (just like a
normal lua run will end with forgetting all its variables, luatex will
forget them and loading a couple of initializations/settings runtime is
no big deal as lua is quite fast. Of course data you initialize in your
code blob is initialized properly because the bytecode is just normal
lua code. Only the code writer knows what is worth initializing anyway
so saving upvalues some way would introduce issues.)
On the other hand a more general scheme could probably work although
I'd need to try building a test case to follow the details below.
I see the general direction you are suggesting but some of the details
escape me:-)
I can write some code, but not today :-). If the "custom searcher"
solution fits, I think that something at the core of LuaTeX (either
LuaTeX itself or the LuaTeX format) would require changes, which would
indeed not be something to decide lightly. Feel free to discuss
further.
Nothing will change in that department i.e. the team will not change the
loader (if only because different macro packages have different demands).
If you want a different loader you can write it in lua and hook it into
the normal loader. Keep in mind that luatex operates in tds and
organization of files in there is well defined and controlled by
variables in the configuration so that different macro packages don't
clash and also loading can be restricted.
Hans
-----------------------------------------------------------------
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
| www.pragma-pod.nl
-----------------------------------------------------------------
