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Add 3.7+ "and" grammar rule and limit "or" more

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rocky
2019-12-11 12:32:32 -05:00
parent bc614cf3fb
commit 6f51f8910c
2 changed files with 13 additions and 2 deletions
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1
uncompyle6/parsers/parse37.py
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@@ -960,6 +960,7 @@ class Python37Parser(Python37BaseParser):
and ::= expr JUMP_IF_FALSE_OR_POP expr COME_FROM
and ::= expr JUMP_IF_FALSE expr COME_FROM
and ::= expr jmp_false expr
## FIXME: Is the below needed or is it covered above??
and ::= expr jmp_false expr COME_FROM

14
uncompyle6/parsers/parse37base.py
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@@ -938,6 +938,7 @@ class Python37BaseParser(PythonParser):
self.check_reduce["ifstmt"] = "AST"
self.check_reduce["ifstmtl"] = "AST"
self.check_reduce["annotate_tuple"] = "noAST"
self.check_reduce["or"] = "tokens"
# FIXME: remove parser errors caused by the below
# self.check_reduce['while1elsestmt'] = 'noAST'
@@ -1043,10 +1044,13 @@ class Python37BaseParser(PythonParser):
return jmp_target != jmp2_target
elif rule == ("and", ("expr", "jmp_false", "expr")):
if tokens[last] == "POP_JUMP_IF_FALSE":
# Ok if jump it doesn't jump to last instruction
# Ok if jump_target doesn't jump to last instruction
return jmp_target != tokens[last].attr
elif tokens[last] == "JUMP_IF_TRUE_OR_POP":
# Ok if jump it does jump right after last instruction
# Ok if jump_target jumps to a COME_FROM after
# the last instruction or jumps right after last instruction
if last + 1 < n and tokens[last + 1] == "COME_FROM":
return jmp_target != tokens[last + 1].off2int()
return jmp_target + 2 != tokens[last].attr
elif rule == ("and", ("expr", "jmp_false", "expr", "COME_FROM")):
return ast[-1].attr != jmp_offset
@@ -1060,6 +1064,12 @@ class Python37BaseParser(PythonParser):
return True
elif lhs == "annotate_tuple":
return not isinstance(tokens[first].attr, tuple)
elif lhs == "or":
# FIXME: This is a cheap test. Should we do something with an AST like we
# do with "and"?
# "or"s with constants like this will have "COME_FROM" at the end
return tokens[last] in ("LOAD_ASSERT", "LOAD_STR", "LOAD_CODE", "LOAD_CONST",
"RAISE_VARARGS_1")
elif lhs == "while1elsestmt":
if last == n: