#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 tmonteil):
`declare_var` sounds like ''varibale declaration'' that exists in many
languages and is completely different that what is done here. There is
already a lot of newcomer's code that start with
{{{
var('a')
a=2
}}}
So i can imagine how much more there will be with `declare_var`, since it
will add confusion to programmers too.
What is currently discussed is a function that injects a symbol into the
namespace, so `inject_symbol` sounds more meaningful as it just tells what
is actually done.
As for the `Symbolic Ring`, it is perhaps better not to know what a
mathematical ring is, so perhaps thinking about that object as `The Lord
of the Rings` is not so bad. We do not have much "calculus" course in
France so i can not tell much about the benefits of playing with objects
we are not able to define, i can just witness from what i see on
ask.sagemath.org that people get more lost by lack of clear definitions
than by excess (e.g. how to factor a polynomial if we do not know on which
ring it is defined?).
I agree that in any case, both injecting and returning is harmful
(`function` does that too).
--
Ticket URL: <http://trac.sagemath.org/ticket/17958#comment:26>
Sage <http://www.sagemath.org>
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