Re: [cc65] Hello and ca65 questions

Hoi Ullrich,

> Not really. ca65 is a one pass assembler, and as such delays evaluation 
> of
> many expressions until end of assembly. If the expression changes several
> times, which one should be evaluated in the end?
>
> In general, there's a problem with forward references and variables. As 
> an
> extreme example, how should the following get evaluated?
>
>         foo = bar + 10

Currently I check if the expression is constant, thus contains no forward 
reference.

But you have this:

	.repeat 10,I
	lda #<(cd+I)
	.endrep
cd:

This generates correct code because you take I as constant (you are 
replacing
the variable-reference by the value).

So I am investigating, why

I == 1 ; constant, obviously
	lda #<(cd+I)
Simplifying the expression should give cd+1 here, I am searching why not ?



-- 
42Bastian Schick
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