I'm trying to parse a comma separated list. To simplify, I'm just using digits. These expressions would be valid: (1, 4, 3) () (4) I can think of two ways to do this and I'm wondering why exact...

I'm playing around with PEG.js start = keyword keyword = a:[a-z]? {return a.join("");} Why am I getting here the error: a.join is not a function when I enter a valid string like abc?

I have a private GitHub repo my-parser-generator which uses pegjs. All underlying logic is written in TypeScript, which is then compiled and fed to pegjs, which generates the final parser. Then thi...

How do you build an AST (Abstract Syntax Tree) for left-associative operators using PEG.js? I've tried to write some code based on the information I found on the internet, but I seem to have made ...

I'm still fighting with ambiguous grammar of Qt's qmake. Now I can't find a way to describe function arguments that can contain parenthesis (e.g. regex): functionName(arg1, "arg2", ^(arg3)+$) I...

I'm trying to wrap my head around PEG by entering simple grammars into the PEG.js playground. Example 1: Input: "abcdef1234567ghijklmn8901opqrs" Desired output: ["abcdef", "1234567", "ghijklmn"...

I'm trying to catch some text between parathesis with a semicolon in the end. Example: (in here there can be 'anything' !"#¤);); any character is possible); I've tried this: Text = "(" text:(.*...

(Note: I've read other questions like this, but I haven't been able to figure this out). I wrote this grammar: start = call ident = [a-z]+ spaces = [ ]+ call = f:ident spaces g:(call / ident) {...

Trying to test a project using PegJS and requirejs. I have a couple of source files, implemented as AMD module (define) which loads through the require API. Below the directory structure: js/ so...

How would one allow for single and double quotes, as well as unicode characters inside of a PEG.js grammar definition? To be more specific, I'd like to be able to capture strings that can contain b...

I've just started playing with PEG.js and have a problem with a grammar (vastly simplified for debugging): start = presingle single / preplural plural presingle = "a" / "b" preplural = "b" ...

I'm trying to extend the example grammar of PEG.js for parsing mathematical expressions with all the 4 operators for my online BASIC interpreter experiment: http://www.dantonag.it/basicjs/basicjs....

I was wondering how do you parse comments (say, a la Haskell), in pegjs. The goal: {- This is a comment and should parse. Comments start with {- and end with -}. If you've noticed, I still inc...

I've defined the following minimal Peg.js grammar: start = "A1" / "A123" which you can try in the sandbox. I would have expected to match "A1" as well as "A123" (according to my notion of how ...

I'm trying to match this f(some_thing) == 'something else' f(some_thing) is a function call, which is an expression == is a boolean operator 'something else' is a string, which also is an expr...

Is there a tool that translates a PEG.js grammar to a TextMate grammar? I am building my own language and would like to have syntax highlighting for it in my preferred editor, TextMate. The gramma...

I am trying to write a simple grammer for PEG.js that would match something like this: some text; arbitrary other text that can also have µnicode; different expression; let's escape the \; semicol...

I'm trying to make a parser using pegjs. I need to parse something like: blah blah START Lorem ipsum dolor sit amet, consectetur adipiscing elit END foo bar etc. I have trouble writing the ru...

I have a bbcode -> html converter that responds to the change event in a textarea. Currently, this is done using a series of regular expressions, and there are a number of pathological cases. I've ...