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is check for TOP and BOT is flatten_binary op

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This commit is contained in:
Marcell Vazquez-Chanlatte 2017-02-27 22:16:01 -08:00
parent ff0253438d
commit 58c33f530c
1 changed files with 2 additions and 3 deletions
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5
stl/ast.py
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@ -14,9 +14,8 @@ t_sym = Symbol('t', positive=True)
def flatten_binary(phi, op, dropT, shortT):
f = lambda x: x.args if isinstance(x, op) else [x]
args = [arg for arg in phi.args if not isinstance(arg, type(dropT))]
if any(isinstance(arg, type(shortT)) for arg in args):
args = [arg for arg in phi.args if arg is not dropT]
if any(arg is shortT for arg in args):
return shortT
elif not args:
return dropT