Improve multiple dispatch

Currently, multiple dispatch using def and case is rather clunky. The suggestion is to replace

def some_func(x):
    case x:
        match _ is int:
            do_stuff_for_int(x)
        match _ is str:
            do_stuff_for_str(x)

with

case def some_func:
    match x is int:
        do_stuff_for_int(x)
    match x is str:
        do_stuff_for_str(x)

[evhub]

Interesting idea—I’ll definitely look into that and see what I can do.

[datnamer]

Awesome!