/// <summary>
/// Validate a function call.
/// </summary>
/// <param name="e">
/// is the expression. </param>
/// <returns> null. </returns>
public virtual object visit(FunctionCall e)
{
QName name = e.name();
if (!expandFunctionQName(name))
{
reportBadPrefix(name.prefix());
}
[email protected] qName = name.asQName();
Function f = _sc.resolveFunction(qName, e.arity());
if (f == null)
{
reportError(new StaticFunctNameError("Function does not exist: " + name.@string() + " arity: " + e.arity()));
}
e.set_function(f);
_resolvedFunctions.Add(qName);
visitExprs(e.GetEnumerator());
return(null);
}