Re: Lua Library Design Workshop
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- Subject: Re: Lua Library Design Workshop
- From: ramsdell@... (John D. Ramsdell)
- Date: 04 Mar 2002 08:04:18 -0500
Roberto Ierusalimschy <rieru@delirius.cs.uiuc.edu> writes:
> In my understanding, we all agreed that most parts of a good module
> system can be done in Lua itself.
I strongly urge that a module system be designed by considering user
needs and not its ease of implementation. If a careful analysis of
user needs dictates a design that requires large changes to the current
code base, we should gladly accept this fact.
For example, we might consider designs that result in a change to byte
code interpreter. In particular, the instruction for fetching a
non-local variable might be changed so that it can access a variable
in a module using a fully qualified name as is done in Java. As a
result, module name resolution could be handled in C code.
In summary, explore designs for module systems under the assumption
that both the language and its implementation can be changed. Study the
engineering trade-offs later, when the user needs for a module system
have been clearly identified. It's too early to talk about
implementation mechanisms.
John