spielwiese
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Last change
on this file since 68549d was
68549d,
checked in by Michael Brickenstein <bricken@…>, 18 years ago
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*bricken: initial version
git-svn-id: file:///usr/local/Singular/svn/trunk@8358 2c84dea3-7e68-4137-9b89-c4e89433aadc
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-
Property mode set to
100644
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File size:
1.1 KB
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| Line | |
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| 1 | from objects import OMobject, OMsymbol |
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| 2 | from cd import * |
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| 3 | from omexceptions import * |
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| 4 | from itertools import izip |
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| 5 | cdFns1=OMcd("fns1") |
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| 6 | lambdasym=OMsymbol("lambda",cdFns1) |
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| 7 | |
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| 8 | def islambda(sym): |
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| 9 | return lambdasym==sym |
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| 10 | |
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| 11 | class OMbinding(OMobject): |
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| 12 | def __init__(self, binder,variables,block): |
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| 13 | super(OMbinding,self).__init__() |
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| 14 | self.block=block |
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| 15 | self.binder=binder |
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| 16 | self.variables=variables |
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| 17 | def evaluate(self,context): |
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| 18 | assert islambda(self.binder) |
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| 19 | self.scope=context.scopeFromCurrentScope() |
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| 20 | return self |
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| 21 | def bind(self, args): |
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| 22 | #print args, self.variables |
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| 23 | assert len(args)==len(self.variables) |
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| 24 | varBindings=dict(izip([i.name for i in self.variables],args)) |
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| 25 | self.scope.push(varBindings) |
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| 26 | def unbind(self): |
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| 27 | self.scope.pop() |
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| 28 | |
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| 29 | def calcErg(self,context): |
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| 30 | return context.evaluateInScope(self.block,self.scope) |
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| 31 | def __call__(self, context,*args): |
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| 32 | self.bind(args) |
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| 33 | erg=self.calcErg(context) |
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| 34 | self.unbind() |
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| 35 | #print "__call__ erg is", erg |
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| 36 | return erg |
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| 37 | |
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