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40 lines
1.2 KiB
Python
40 lines
1.2 KiB
Python
# In Python 3.2 JUMP_ABSOLUTE's (which can
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# turn into COME_FROM's) are not optimized as
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# they are in later Python's.
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#
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# So an if statement can jump to the end of a for loop
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# which in turn jump's back to the beginning of that loop.
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#
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# Should handle in Python 3.2
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#
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# 98 JUMP_BACK '16' statement after: names.append(name) to loop head
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# 101_0 COME_FROM '50' statement: if name == ...to fictional "end if"
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# 101 JUMP_BACK '16' jump as before to loop head
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# RUNNABLE!
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def _slotnames(cls):
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names = []
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for c in cls.__mro__:
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if "__slots__" in c.__dict__:
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slots = c.__dict__['__slots__']
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for name in slots:
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if name == "__dict__":
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continue
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else:
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names.append(name) # 3.2 bug here jumping to outer for
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# From 3.2.6 pdb.py
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# There is no "come_from" after the "if" since the
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# if jumps back to the loop. For this we use
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# grammar rule "ifstmtl"
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def lasti2lineno(linestarts, a):
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for i in linestarts:
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if a:
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return a
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return -1
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assert lasti2lineno([], True) == -1
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assert lasti2lineno([], False) == -1
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assert lasti2lineno([1], False) == -1
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assert lasti2lineno([1], True) == 1
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