So I've looked at the pegged library and used it a little bit and it seems really good. But there doesn't seem like there's a built-in way to get line numbers of nodes in the parse tree (or maybe I'm missing something). This would useful because if an error occurs during interpreting/compiling, you could give the user a line number where their error occurred by just getting the line number of the node that's currently being processed. Is there a way to do this in pegged?

On Monday, 15 August 2022 at 22:55:30 UTC, TheZipCreator wrote:

It looks like the parse tree in pegged stores the start and end byte indices of the portion of the input text it corresponds to:

https://github.com/PhilippeSigaud/Pegged/blob/v0.4.6/pegged/peg.d#L251-L252

It should be possible to compute line numbers based on these indices.

On Monday, 15 August 2022 at 23:38:09 UTC, Paul Backus wrote:

ah, that's what I was looking for, thanks