[jsinterp] Fix and improve expression parsing
* improve BODMAS (fixes https://github.com/ytdl-org/youtube-dl/issues/32815) * support more weird expressions with multiple unary ops
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@ -798,18 +798,28 @@ class JSInterpreter(object):
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right_expr = separated.pop()
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# handle operators that are both unary and binary, minimal BODMAS
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if op in ('+', '-'):
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# simplify/adjust consecutive instances of these operators
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undone = 0
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while len(separated) > 1 and not separated[-1].strip():
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undone += 1
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separated.pop()
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if op == '-' and undone % 2 != 0:
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right_expr = op + right_expr
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elif op == '+':
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while len(separated) > 1 and separated[-1].strip() in self.OP_CHARS:
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right_expr = separated.pop() + right_expr
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# hanging op at end of left => unary + (strip) or - (push right)
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left_val = separated[-1]
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for dm_op in ('*', '%', '/', '**'):
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bodmas = tuple(self._separate(left_val, dm_op, skip_delims=skip_delim))
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if len(bodmas) > 1 and not bodmas[-1].strip():
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expr = op.join(separated) + op + right_expr
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right_expr = None
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if len(separated) > 1:
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separated.pop()
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right_expr = op.join((left_val, right_expr))
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else:
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separated = [op.join((left_val, right_expr))]
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right_expr = None
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break
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if right_expr is None:
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continue
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