#13586: BuiltinFunction expects to be instantiated only once
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Reporter: burcin | Owner: burcin
Type: defect | Status: new
Priority: major | Milestone: sage-5.5
Component: symbolics | Keywords: symbolic function
Work issues: | Report Upstream: N/A
Reviewers: | Authors: Burcin Erocal
Merged in: | Dependencies:
Stopgaps: |
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From [[http://ask.sagemath.org/question/1843/weird-behavior-
builtinfunction|this ask.sagemath.org question]]:
{{{
sage: from sage.symbolic.function import BuiltinFunction
sage: class AFunction(BuiltinFunction):
....: def __init__(self, name, exp=1):
....: self.exponent=exp
....: BuiltinFunction.__init__(self, name, nargs=1)
....: def _eval_(self, arg):
....: return arg**self.exponent
....:
sage: p2 = AFunction('p2', 2)
sage: p2(x)
x^2
sage: p3 = AFunction('p3', 3)
sage: p3(x)
x^2
}}}
ATM, we only allow a `BuiltinFunction` to be instantiated once.
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/13586>
Sage <http://www.sagemath.org>
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