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tree-sitter-motoko

v0.1.0

Published

Motoko grammar for tree-sitter

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Links

Git

Maintainers

tomchantlertomchantlergiorgiopiatti-caffeinatedgiorgiopiatti-caffeinatedcaffeinelabs-itownercaffeinelabs-itownerkamillistopad-caffeinekamillistopad-caffeine

Keywords

incrementalparsingtree-sittermotoko

Readme

tree-sitter-motoko

A tree-sitter grammar for the Motoko programming language.

Why does this exist?

There is an existing grammar at https://github.com/polychromatist/tree-sitter-motoko

I wanted to re-familiarize myself with every corner of Motoko's syntax, so I decided to implement my own. The existing grammar suffers from a tree-sitter bug, which made it unsuitable for implementing parser based indentation in Emacs. This grammar works around that bug.

Additional differences:

  • Doesn't require a custom scanner
  • Covers some more recent syntax additions (parentheticals), and some of the weirder lexical productions
  • Follows the compiler's grammar more closely by implementing parameterized expression productions.
  • ~33% reduction in compiled output size
  • Tested to successfully parse every .mo file in the compiler repository, as well as base