Enhancement suggestion.

If a function is overloaded and invoked without any arguments, swig 
produces error like this:

    Foo_bar: No matching function for overloaded 'Foo_bar'

It would be more user-friendly if the list of usages of the available 
overloads were produced.  For example, if I have two methods in class Foo:

    bar (Kuku * kuku);
    bar (Dudu * dudu);

I'd like this error message instead of the current one:

    Foo_bar: ambiguous invocation of overloaded 'Foo_bar'. Use one of:
        Foo_bar kuku
        Foo_bar dudu

Incidentally, it would be also nice for the error message to indicate 
the expected argument types, but this would require some serious 
changes, I suppose...

KK

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