====== Create labels on the fly using macros (in ca65) ======

This was written by RadiantX on [[http://noname.c64.org/csdb/forums/?roomid=11&topicid=74546#74692|CSDb]], and put on Codebase by me (FTC). 

It is a description of how to create labels on the fly in the ca65 assembler by using macros. In this particular example, the labels are generated using a repeat counter in a loop. The macro that is used goes like this:

<code>
.macro makeident lname, count
    .ident(.concat(lname,.sprintf("%d", count))):
.endmacro
</code>


Using a macro like this it's possible to create labels using a repeat counter.

<code>
.repeat $100, I
    makeident "foo", I
    lda $1000 + I
    sta $2000 + I
.endrepeat
</code>

This produces the following code:

<code>
foo0:
    lda $1000
    sta $2000
foo1:
    lda $1001
    sta $2001
foo2:
    [...]
</code>