Can child/sub tokens appear in the parse tree?

3

If you’re desperate/creative you can used the parseMixed feature. First, create your base grammar which contains Either. Then define a second grammar that can parse the contents of Either; in this case Number and Letter. Finally, do something like

baseParser.configure({
	wrap: parseMixed((node) =>
		node.type.is(Either) ? { parser: eitherParser } : null,
	),
})

There is extra complexity when dealing with a mixed language, and it isn’t as powerful as an integrated grammar, but hey you’re desperate :slight_smile: