#20354: PPLBackend: Add support for integer variables
-------------------------------------+-------------------------------------
Reporter: mkoeppe | Owner:
Type: enhancement | Status: needs_review
Priority: major | Milestone: sage-7.2
Component: numerical | Resolution:
Keywords: lp | Merged in:
Authors: Matthias Koeppe | Reviewers:
Report Upstream: N/A | Work issues:
Branch: | Commit:
u/mkoeppe/pplbackend__add_support_for_integer_variables|
144a970ae97b209acccf6d38de540401c8c8a587
Dependencies: #20351,#20303 | Stopgaps:
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Comment (by mkoeppe):
No, `continuous=True` in the arglist cannot work
because then one cannot distinguish
- `add_variable(..., binary=True)` (which should create a binary
variable)
- `add_variable(..., binary=True, continuous=True)` (which should raise
an error).
All backends implement the defaulting to continuous variables
imperatively.
Previously it did not matter because the PPL backend was simply ignoring
these parameters altogether.
(I've added a dicussion of this interface to ticket #20324.)
--
Ticket URL: <http://trac.sagemath.org/ticket/20354#comment:8>
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