Questions tagged [petitparser]
PetitParser is a parsing framework for Smalltalk, Java and Dart.
petitparser
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Understanding PetitParser2 behavior
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 ...
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How to correctly handle parsing errors with PetitParser or PetitParser2 in Pharo
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)
...
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PetitParser2 Smalltalk grammar testing dataset
I would like to use PetitParser2 in Pharo.
I would like to use the Smalltalk grammar, but the testing dataset is not available anymore. Does anyone know where to get it?
Edit:
The filename missing is ...
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How to consume until a delimiter - with exceptions (Petit Parser for Dart)
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 ...
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Dart/Flutter PetitParser Fails to Ingest
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 ...
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What is an example of use case for epsilon in dart petitparser?
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&...
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Parse XPath with PetitParser in Java
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 ...
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Cannot figure out why I'm getting error when parsing a string in Dart/Flutter with petitparser: uppercase letter expected at 1:1
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|...
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Can someone point me in the right direction to begin parsing this string in dart?
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) &...
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Why is the ordered choice ignored of toChoiceParser() when adding a plus() parser?
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 ...
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Using whitespace as a list separator
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
...
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Java petitparser optional end of expression
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 ...
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PetitParser and Parentheses
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:...
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How to get the content between two identical elements
I want to parse the root element of such data as follows
<elementA>
...
...anything
...
</ elementA>
<elementB>
<!--anything such as same element name-->
<elementB>...
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Using Flutter's PetiteParser to create FHIRPath
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'...
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