#13110: Deprecate global RealNumber() and ComplexNumber()
-------------------------------------+------------------------------
Reporter: eviatarbach | Owner: jason, jkantor
Type: defect | Status: needs_work
Priority: major | Milestone: sage-6.4
Component: numerical | Resolution:
Keywords: complex, beginner | Merged in:
Authors: Travis Scrimshaw | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
Dependencies: | Stopgaps:
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Changes (by jdemeyer):
* component: coercion => numerical
Old description:
> This works fine:
> {{{
> sage: CC(complex('13.8+6.2j'))
> 13.8000000000000 + 6.20000000000000*I
> sage: CDF(complex('13.8+6.2j'))
> 13.8 + 6.2*I
> }}}
>
> However, it is a ''conversion'' while it should be a ''coercion''.
> {{{
> sage: CC.has_coerce_map_from(complex)
> False
> }}}
> This is inconsistent with
> {{{
> sage: CC.has_coerce_map_from(float)
> True
> }}}
New description:
The `RealNumber()` and `ComplexNumber()` are meant for the Sage preparser
and shouldn't be used directly. For example, the following doesn't work:
{{{
sage: ComplexNumber(complex('13.8+6.2j'))
TypeError: unable to coerce to a ComplexNumber: <type 'str'>
}}}
--
Comment:
Sorry, I shouldn't have taken over this ticket, it's about something else.
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Ticket URL: <http://trac.sagemath.org/ticket/13110#comment:25>
Sage <http://www.sagemath.org>
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