RealKC
commented
4 years ago Commit 4a506f04ecef7e0d58fef5ef599a20be3b1c544f removed all traces of the initial preprocessor, this is a good thing (code quality was low + wasn't half finished + it was commented out anyway).
Implementation notes:
if, andelifshould share the expression parses, which should likely be implemented using the shunting-yard algorithm [1]
Specification notes:
- the operators supported in
(el)ifshould be specified - specify what happens when the preprocessor has to expand an empty macro in (1)
(el)ifexpressions (should we follow CPP's example and expand them to 0?) and (2) in usual usages of the macros
Possible features that might be worth adding:
- defining macros from the command line
- textual inclusion of files for macros that appear in multiple files? (Although currently you can't link files... It would be nice for macros used across projects, I guess? Also could allow a model where despite working in different files they all get included by a single one.)
There are still bugs regarding codegen however, so this issue can wait for a bit longer.
In commit 8b189c292aa883a7e2c7049cb1d84fb4404bc90e I gave up on working on the assembler. This is something I still need to write and this issue stands to remind me of that.