fn:function-arity

Returns the arity of the function identified by a function item.

function-arity($func as function(*)) ➔ xs:integer

Arguments
	$func	function(*)	The function item whose arity is required
Result		xs:integer

Namespace

http://www.w3.org/2005/xpath-functions

Links to W3C specifications

XPath 3.0 Functions and Operators

XPath 3.1 Functions and Operators

Notes on the Saxon implementation

Available since Saxon 9.3, provided XPath 3.0 is enabled.