Rewriting Errors in Parser

Question
1

Good morning all,

Could you kindly help me in finding out what possibilities there are in writing more explanatory errors in Scala parser combinators, including also the Positional library please ?

Thanks a lot and good day :slight_smile:

2

Every parser combinator library should allow you to explicitly inject errors failing the parse with some message at any point.
For example, there is cats-parse, which is designed after trifecta (a Haskell library) which is known to have good parser diagnostic output:

What exactly are you looking for? What do you mean with Positional library?

3

Good morning,

Thanks for your help, but I managed to solve it.

I needed to write my one error, with the line number and letter number in that line depicted in the error. i.e. Error in line x and column y : Found "a"

Thanks a lot for your help and good day,
Gianluca Zahra