Re: [Jython-users] Re: assert/raise syntax ambiguity ?

[<bc...@wo...>]

[assert/raise on tuples or on exprs]

I can't quite find head or tail in this discussion, but I think that the
conclusions are wrong.

The "assert" statement allow for one or for two expresion as arguments.
You are allow to make that single expresion a 2-tuple, but I bet that it
doesn't do what you wanted it to do:

Jython 2.1a1 on java1.3.0 (JIT: null)
Type "copyright", "credits" or "license" for more information.
>>> assert 1
>>> assert 0
Traceback (innermost last):
  File "<console>", line 1, in ?
AssertionError:
>>> assert 0, "message"
Traceback (innermost last):
  File "<console>", line 1, in ?
AssertionError: message
>>> assert (0, "message")
>>>

Notice that the last assert didn't throw an AssertionError and it never
will.

I'll also like to set straight that there are IMO *not* any conflict in
the grammar or language def about the optional comma in the assert
statement and the tuple creating comma in the atom production.

regards,
finn