folding / delims question

Lezer
1

So… I made a grammar and syntax highlighting is working. Thanks a ton.

The lang is just a bunch of statements like this:

action-a
  foo
  bar
  ;

action-2
  baz
  qux;

It’d be cool to have code-folding on semicolons and just show action-x; when folded.

I’m not sure what I should use for foldNodeProp on the lezer side, or how to set up the delimiter.

There aren’t really any delimiters in the lang (other than semicolon? and the action keyword?)

2

If your tree has something like a Statement node, something like this (in parser.configure({props: [...]}) might work…

  foldNodeProp.add({
    Statement(tree) { return {from: tree.firstChild!.to, to: tree.to} }
  })

That creates a fold range from after the first token in the statement to the end of the statement.

2 Likes
3

That works perfectly.