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class NebPanic(BaseException):
pass
class InterpretPanic(NebPanic):
def __init__(self, sym, msg, arg=None):
big_message = f"[{sym.line}] '{sym.name}': {msg}"
if arg is not None:
big_message += f" (got {arg})"
super().__init__(big_message)
class LexError(NebPanic):
def __init__(self, message, line):
super().__init__(f"line {line}: {message}")
class ParseError(NebPanic):
def __init__(self, message, line):
super().__init__(f"line {line}: {message}")
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