Re: Adding several methamethods could be helpful

[Frank Meier-Dörnberg <frank@...>]

Am 27.03.2011 11:41, schrieb Daurnimator:
> I do see merit in this; many times I've been bitten by not being able
> to reuse memory in calculations
> eg, a=b+c*d
> ==>  a temporary object (for c*d) is created; and using one of the
> operand's memory is difficult, if not impossible for some
> circumstances.
>
> Daurn.
Only as a Sunday morning thoughts from me:
Ideally, a library knows best how to handle a complex expression of 
their own objects.
So, one have to bring the complete expression into the library, but how?

Suppose a C + + math library-"MyDream" know themselves how a complex 
compound expressions such as "A = (B * C + D) * E" is to handle 
intelligently.
Could Lua call my mydream library with the AST of "A=(B * C + D) * E" 
instead of evaluating it itself somehow?

Mmh... sound a like a job for metalua...

--Frank