parsingtree.py 文件源码

def unpack_trailer(atom, power_star):
    out = atom
    for trailer in power_star:
        if isinstance(trailer, FcnCall):
            trailer.function = out
            inherit_lineno(trailer, out)
            out = trailer
        elif isinstance(trailer, Attribute):
            trailer.value = out
            inherit_lineno(trailer, out, alt=False)
            if hasattr(out, "alt"):
                trailer.alt = out.alt
            out = trailer
        elif isinstance(trailer, Subscript):
            trailer.value = out
            inherit_lineno(trailer, out)
            out = trailer
        else:
            assert False
    return out