Re:GHC Parser Principles
by tom_mellior on Tuesday May 15, 2018 @09:48AM
(#17073867)
> A hand-written parser can have better error recovery and more helpful error messages.
That depends on what you're comparing to. The Menhir parser generator can generate a file with all possible "error states" in the parser in which you can specify very nice and friendly error messages for each one.
That depends on what you're comparing to. The Menhir parser generator can generate a file with all possible "error states" in the parser in which you can specify very nice and friendly error messages for each one.
I've posted this before: http://gallium.inria.fr/~fpottier/slides/fpottier-2015-11-ou... (ignore the French title, the rest is in English). The examples for a C grammar in Menhir show much better error messages than the hand-written GCC ones.