Access node location in visitor

[medihack]

I am using a visitor that extends from the return value of getBaseCstVisitorConstructor() to translate the CST to an AST. I also enabled nodeLocationTracking in the parser (full). Is it possible to access the location information in the visitor? The ctx object does only contain the children of the current node, but I don't see a way to access the location on the node itself.

[bd82]

Hello @medihack

The CST Visitor APIs need rework: #1039

You could try overriding the visit method and save a reference to the current cstNode before it's visitor
get executed.

chevrotain/packages/chevrotain/src/parse/cst/cst_visitor.ts

Lines 46 to 60 in 2dce611

	visit: function (cstNode: CstNode | CstNode[], param: any) {
	// enables writing more concise visitor methods when CstNode has only a single child
	if (isArray(cstNode)) {
	// A CST Node's children dictionary can never have empty arrays as values
	// If a key is defined there will be at least one element in the corresponding value array.
	cstNode = cstNode[0]
	}
	// enables passing optional CstNodes concisely.
	if (isUndefined(cstNode)) {
	return undefined
	}
	return this[cstNode.name](cstNode.children, param)
	},

[medihack]

Thanks a lot. Your suggestion works perfectly.