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