Saxon » SaxonJS

In the code for fn:filter(), there are two problems:

• Firstly, the code explicitly tests whether the supplied value is an XdmFunction (maps and arrays are not)

• Secondly, the code invokes the function using the evaluate() method: maps and arrays have no such method.

Other higher-order functions in the core library have similar problems. Some, like for-each, have explicit code to handle this case, others, like for-each-pair, crash in the same way.

I have added a number of QT3 tests to show that maps and arrays are substitutable for functions in calls to fn:filter, fn:for-each, fn:sort, array:filter, array:for-each, array:sort.