#17958: implement declare_var, deprecate (None)var
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Reporter: rws | Owner:
Type: defect | Status: new
Priority: major | Milestone: sage-6.6
Component: symbolics | Resolution:
Keywords: | Merged in:
Authors: | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Comment (by mmezzarobba):
Replying to [comment:18 nbruin]:
> It is ''not'' consistent with the rest of sage and hard to implement,
since presently it amounts to
> {{{_ = SR(names=('x',)); (x,) = _._first_ngens(1)}}}
> Normally, calling a constructor with different names gives different
results:
> {{{
> sage: PolynomialRing(QQ,names=('x',)) == PolynomialRing(QQ,names=('y',))
> False
> }}}
> and we would need to hack `SR._first_ngens` to remember the last set of
generators that got returned.
I mean from a UI point of view. Otherwise, sure, it would require the
preparser to repeat the names when asking for the generators, or something
similar.
Is there another variant that you like better?
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Ticket URL: <http://trac.sagemath.org/ticket/17958#comment:19>
Sage <http://www.sagemath.org>
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