lark

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I'd like to be able to switch the input file just after the lexer sees "include filename". Ideally this should happen while parsing and building the parse tree. (Possibly a...

gwr

Lark allows both '?' and '_' on the same rule

1

**Describe the bug** Lark allows `?` and `_` to be used on the same rule. As they both control the inlining of children, I would expect them to be mutually...

chanicpanic

ambiguity and whitespace with lalr

1

Hi, I am trying to understand ambiguity and whitespace in an lalr(1) parser. The first program works as I would expect, but the second fails on input "a ". Could...

gitshub

Design a new Lark cheatsheet

13

The existing cheatsheet is here: https://github.com/lark-parser/lark/blob/master/docs/lark_cheatsheet.pdf The design and format are somewhat lacking.

erezsh

Moved the metadata into `PEP 621`-compliant `pyproject.toml`.

5

KOLANICH

Extra optional symbol affect on choice between two regexps

4

**Should extra optional symbol affect on choice between two regexps?** Lets check example: ``` import lark parser = lark.Lark(''' ?start: s %ignore /[\\n]/+ R1: /[\\w\\+]/+ R2: /(\\w)/+ SPACE: " "...

ObjatieGroba

**Describe the bug** Lark v1.1.2 The standalone parser generated with `python -m lark.tools.standalone` appears to have an issue with the `PatternRE`/`PatternStr` subclasses because when I get an `UnexpectedCharacters` error, it's...

NiklasRosenstein

SlottedTree isn't as efficient as it could be

3

SlottedTree could be a slot-only class, thereby removing any need for an attribute dictionary, which takes up memory. However, by inheriting from Tree, it inherits the attribute dictionary, even if...

erezsh

Typing is a bit too sparse to run mypyc, so I've tried to fill in a couple of modules (lark.py and utils.py) with the help of monkeytype. This is based...

henryiii

style: pre-commit basic config

7

This adds a basic pre-commit-config, a tox job running it (to help new contributors - usually you should run pre-commit directly to take advantage of it's start-up speed), and a...

henryiii