Using Megaparsec 5. Following this guide, I can achieve a back-tracking user-state by combining StateT and ParsecT (non-defined types should be obvious/irrelevant): type MyParser a = StateT UserSt...

Per megaparsec docs, "Since version 8, reporting multiple parse errors at once has become much easier." I haven't been able to find a single example of doing it. The only one I find is this. Howeve...

buildExpressionParser only deals with unary and binary operators. Can it handle ternary operators like ?:? There are some discussions here and here, but none is conclusive.

I would like to parse a basic indented language using Megaparsec. Originally I was using Parsec which I managed to get working correctly with indentation but now I'm having quite some trouble. I'...

for a small compiler project we are currently working on implementing a compiler for a subset of C for which we decided to use Haskell and megaparsec. Overall we made good progress but there are st...

I am writing a parser for a custom jupter kernel using megaparsec. I was able to re-use the parser to provide completions too: the custom error message generated from the megaparsec library are tra...

I'm working on a small parser using Megaparsec and trying to parse arithmetic. -- Arithmetic expressions data Aexp = N Num | V Var | Mult Aexp Aexp | Add Aexp Aexp | Sub Aexp Aexp derivin...

I want to parse text similar to this in Haskell using Megaparsec. # START SKIP def foo(a,b): c = 2*a # Foo return a + b # END SKIP , where # START SKIP and # END SKIP marks the start and end ...

I'm going to use megaparsec for parsing a programming language for university project. However, I searched for finding a way to report multiple errors. I know about withRecovery and I saw this is...