24 lines
421 B
Python
24 lines
421 B
Python
class IntegerStack(list):
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def __init__(self):
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stack = [] * 128
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self.extend(stack)
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def depth(self):
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return len(self)
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def tos(self):
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return self[-1]
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def push(self, v):
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self.append(v)
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def dup(self):
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self.append(self[-1])
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def drop(self):
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self.pop()
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def swap(self):
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a = self[-2]
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self[-2] = self[-1]
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self[-1] = a
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