#18083: Stop using old_style_globals
-------------------------------------+-------------------------------------
Reporter: jdemeyer | Owner:
Type: enhancement | Status: new
Priority: major | Milestone: sage-6.6
Component: cython | Resolution:
Keywords: | Merged in:
Authors: Jeroen Demeyer | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/jdemeyer/stop_using_old_style_globals|
9ccd889321d311903d4ab26449e6dd8154879aee
Dependencies: #12446, #18084 | Stopgaps:
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Comment (by nbruin):
Just an idea:
Logically, we can't really ask an object to inject itself into "the"
globals namespace, because the object doesn't really have access to what
that namespace is in the relevant situation.
Instead what one ''can'' do from the REPL is to bind an object to its
print name, which is what injection usually does. Then one actually
doesn't need any special machinery on objects. See:
[http://trac.sagemath.org/ticket/17958#comment:54]
In principle then one can spell:
{{{
sage: x = SR.var('x')
sage: inject(x)
}}}
where `inject` could be defined in the "global scope" (by injecting its
definition into the start-up, like `.sage`):
{{{
def inject(a):
globals[str(a)]=a
}}}
except that we'd want to do some validation on `str(a)` before we do that.
It can also be shortened to `inject(SR.var('x'))` to avoid repetition.
Of course to ''type'' this is very inconvenient, so we'd need some further
wrappers to make the syntax more palatable (the `%var` directive seems
like a good step), but the simplicity of the implementation and the
flexibility of the construction leads me to believe that this is the right
way of providing injection capability.
--
Ticket URL: <http://trac.sagemath.org/ticket/18083#comment:7>
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