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@ -121,22 +121,34 @@ def selection_inside_projection(n):
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def subsequent_renames(n):
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'''This function removes redoundant subsequent renames'''
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changes=0
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print "in"
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if n.name=='π' and n.child.name==n.name:
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changes=1
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print "in-in"
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n.prop+=','+n.child.prop
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_vars={}
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for i in n.child.prop.split(','):
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q=i.split('➡')
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c_vars[q[0]]=q[1]
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n.child=n.child.child
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if n.name=='ρ' and n.child.name==n.name:
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changes=1
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print "PROP",n.prop,"==========",n.child.prop
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n.prop+=','+n.child.prop
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_vars={}
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for i in n.prop.split(','):
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q=i.split('➡')
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_vars[q[0]]=q[1]
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n.child=n.child.child
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print _vars
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for i in list(_vars.keys()):
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print i
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if _vars[i] in _vars.keys():
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#Double rename on attribute
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print "i:%s\tvars[i]:%s\t_vars[_vars[i]]: %s\n" % (i,_vars[i],_vars[_vars[i]])
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_vars[i] = _vars[_vars[i]]
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_vars.pop(i)
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n.prop=""
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print _vars
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for i in _vars.items():
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n.prop+="%s➡%s" % (i[0],i[1])
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#recoursive scan
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if n.kind==optimizer.UNARY:
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if n.kind==optimizer.UNARY:
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changes+=subsequent_renames(n.child)
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elif n.kind==optimizer.BINARY:
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changes+=subsequent_renames(n.right)
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