[Mathlib-develop] Changes to JMathLib

[mark <msp...@ya...>]

Hi,

This is a bit later than I intended but I just committed a set of changes=
 to=20
JMathLib.

These are:

New error code, Now if a function hasn't been implemented, like Factorise=
,=20
instead of just returning 0 it should throw a not implemented error.

Return Function implemented - The return function throws a Control except=
ion=20
which is caught by the UserFunction object. Any parameters are passed as =
the=20
function return values.

User Function change: instead of storing the variable list and code seper=
ately=20
the User function now stores a Context Object.

I was doing some experimenting with coroutines, using a yield function to=
 exit=20
the function so that it's state would be saved. However I couldn't find a=
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reliable way to store the last expression that had been executed so that=20
hasn't been committed.

Load Function - The load function can be used to reload a m-file if it ha=
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been modified. It'll make testing m-files easier since you can test chang=
es=20
without having to rerun the interpreter.

The FunctionManager now uses a hash map to store any user functions.

Best Regards

Mark Sparshatt

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