I'm struggling with a small parser using PetitParser2. Here is a fragment of some of the rules I'm defining but their behaviour is not as I could expect: andKeyword := 'and' asPParser trim, #letter ...

I know there has been an old question How can a PetitParser parse rule signal an error?. Lukas Renggli has written it is: in general this is not good style (mixes syntactic and semantic analysis) ...

Fair enough, previously was a badly worded question. I'm going to take another stab at it. I'm using Dart's PetitParser to consume input. I want a lexer that will accept any string until one of a ...

Having trouble again getting a my input properly ingested, and I'm not sure what I'm doing wrong. The full file I'm using to to define my lexers can be seen here. But specifically what I'm running ...

I don't understand the comment: /// Returns a parser that consumes nothing and succeeds. /// /// For example, `char('a').or(epsilon())` is equivalent to /// `char('a').optional()`. @useResult Parser&...

Does anybody know if there is an existing implementation of an XPath parser in Java that uses PetitParser? I assume it is more or less impossible to cover all thinkable XPath expressions that are ...

UPDATE 1: It looks like changing digit().plus() to word().plus() works. Does that seem right? Petitparser has proven to be very powerful! I have the following flutter/dart code: testString = '((S|71|...

I have a series of string like this: (((S|69|L || S|69|R || S|72|L || S|72|R) && ((S|62|L && (S|78|L || S|55|L) && (S|77|L || S|1|L)) || (S|62|R && (S|78|R || S|55|R) &...

I am stuck at one point with the Dart package petitparser: It seems that the "priority rule" ("parse p1, if that doesn't work parse p2 - ordered choice") is ignored by the ...

I can successfully parse a comma-delimited list with dart-petitparser, but the same code fails when confronted with a space-delimited list: class MyDefinition extends GrammarDefinition { @override ...

I need a parser that took only important marked parts from a text file. This is sample input: else before 1 else before 2 --Start Query 1 important 1 --End 1 else between 1 and 2 - 1 else between 1 ...

Sorry, I ran into another question about using PetitParser. I've figured out my recursive issues, but now I have a problem with parentheses. If I need to be able to parse the following two expressions:...

I want to parse the root element of such data as follows <elementA> ... ...anything ... </ elementA> <elementB> <!--anything such as same element name--> <elementB>...

I'd like to ask for some guidance using petitparser (I'm updating this question). There's a json-based grammar called FHIRPath that I'm trying to recreate in dart. I'm new to grammars like this, so it'...

petitparser is a parser generator written in dart to be used e.g. in Flutter. According to this page, petitparser allows to use ref0 to reference the current parse class. In the section Using Grammar ...