[antlr-interest] action syntax - "#"

[frank uno]

Hi all

We are working with a part of the ANTLR grammar for
XQuery from the eXist project. 

We are unable to find any documentation for the symbol
- "#" used in the action syntax part.

For Example:

quantifiedInVarBinding throws XPathException
{ String varName; }:
	DOLLAR! varName=qName! ( typeDeclaration )? "in"!
exprSingle
	{ #quantifiedInVarBinding = #(#[VARIABLE_BINDING,
varName], #quantifiedInVarBinding); }
	;

Any help would be greatly appreaciated.

---
Thank You



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