Is it possible to capture call site information (e.g. row and column) for matches?

[yatesco]

Hi, thanks for this! Is it possible to capture the row and column of where a match starts?

I'm using pest in a transformation pipeline, and it would be really useful to be able to detail where the matches were in the source.

For example, I'm parsing some graphs whose nodes contain meta data and documenting where that meta data is used, so I want to display something like:

node	meta	where
node17	propertyOne	fileA:14,5, fileA:187,4
node17	propertyTwo	fileC:14,5, fileA:182,4

I've got the parser working to grab the bits I want, but I can't where those bits are:

node	meta	where
node17	propertyOne	<how do I get this?>
node17	propertyTwo	<how do I get this?>

Thanks :-)

[tomtau]

I guess you can perhaps use Span? It gives a textual position of each match's start and end (not sure if that's what you meant -- otherwise, a custom code may be needed to compute the "where" part):
https://docs.rs/pest/latest/pest/iterators/struct.Pair.html#method.as_span
https://docs.rs/pest/latest/pest/struct.Span.html

[yatesco]

perfect - thank you!