nesdev.com

I have a macro which detects a prefix at the beginning of a symbol. These prefixes indicate a 16 bit value, arranged as structures of arrays, to direct how the macro generates code. I simply want to detect one prefix OR the other prefix. When I try to put the two below invocations of a c-style macro in an || expression, ca65 errors out. Even if I use parentheses around each macro invocation and around the entire expression itself. I was able to work around this using .set as in the below code snippet, but is ca65's expression parsing really this broken?

Can we have the definition of starts_with?

I believe that the reason you can't use the macros directly in the IF statement is because ca65 doesn't know when the last parameter of a c-style macro ends. In that case, delimiting the last parameter with {} should work. Something like this:

Cool, worked perfectly! Thanks sir! ca65's macros and directives are so gnarly...but I love them

For curiosity's sake, starts_with and ends_with are here:


These resulted from a conversation with thefox.

Cool, but I still think it's weird that caching the results beforehand doesn't work...


Thanks. I remember that conversation, but I didn't know if you were using that exact same code or if you had made any changes since then.

Anyway, I really can't figure out why caching the 2 results using .set screws up the .if... .set should put the numeric results into those symbols, regardless of how the macros were written, right?

Now this is weird... I just tried this exact code and it works just fine:



Output:

Sorry my OP was not terribly clear---doing this works for me, my question was why can't I just put the macro invocation directly surrounding the ||. Using the { } in each invocation as you suggested allows me to do so, so I've removed the two prefix variables. I now have:

Ah, my bad. I thought you said the workaround didn't work, but now I see this wasn't the case.