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44 lines
1.5 KiB
Python
44 lines
1.5 KiB
Python
# Copyright (c) 2020 Rocky Bernstein
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from uncompyle6.parsers.treenode import SyntaxTree
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def tryelsestmtl3(self, lhs, n, rule, ast, tokens, first, last):
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# Check the end of the except handler that there isn't a jump from
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# inside the except handler to the end. If that happens
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# then this is a "try" with no "else".
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except_handler = ast[3]
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if except_handler == "except_handler_else":
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except_handler = except_handler[0]
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come_from = except_handler[-1]
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# We only care about the *first* come_from because that is the
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# the innermost one. So if the "tryelse" is invalid (should be a "try")
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# it will be invalid here.
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if come_from == "COME_FROM":
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first_come_from = except_handler[-1]
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elif come_from == "END_FINALLY":
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return False
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elif come_from == "except_return":
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return False
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else:
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assert come_from in ("come_froms", "opt_come_from_except")
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first_come_from = come_from[0]
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if not hasattr(first_come_from, "attr"):
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# optional come from
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return False
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leading_jump = except_handler[0]
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if not hasattr(leading_jump, "offset"):
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return False
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# We really don't care that this is a jump per-se. But
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# we could also check that this jumps to the end of the except if
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# desired.
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if isinstance(leading_jump, SyntaxTree):
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except_handler_first_offset = leading_jump.first_child().off2int()
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else:
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except_handler_first_offset = leading_jump.off2int()
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return first_come_from.attr > except_handler_first_offset
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