On Tue, Mar 1, 2016 at 11:43 AM, Nils Bruin <nbr...@sfu.ca> wrote:
> On Tuesday, March 1, 2016 at 8:15:56 AM UTC-8, William wrote:
>>
>> -1 to telling users that a syntax is deprecated and will be removed, but
>> planning to never remove it.
>>
>> +1 to executing the removal.
>
> We can't let a lottery like this:
>
> sage: var('foo,bar')
> (foo, bar)
> sage: f=foo+bar
> sage: f(1)
> foo + 1
>
> go silently. The proper solution is raising an error.
>
> We *could* special case the situation where len(f.variables()) == 1 and
> one argument is given. Apart from no arguments at all, That's the only
> situation that's unambiguous, as far as I know.
>
+1 to finishing the deprecation and adding a special case for one
variable. We should make sure that the error message is helpful.
David
> The problem at http://trac.sagemath.org/ticket/12070 is just misuse, so
> should be resolved by improving documentation.
>
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