Hide scope from user via decorators

[nsbgn]

The recommended way of defining a language either via scope:

A = TypeOperator()
cct = Language(scope=locals())

... or via properties:

cct = Language()
cct.A = TypeOperator()

... both have issues. You need to remember to define the namespace only after you've defined everything else. In the first, there's loose wiring in the use of locals(); in the second, you need to be very verbose, referencing the Language in every definition and in every typing.

Using decorators would solve this:

@Language
def cct():
    A = TypeOperator()
    ...

[nsbgn]

Alternatively (or additionally), whole modules could be passed as scope. You could do cct = Language(cct.vocab)