2023-09-29 11:31:28 +08:00
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single = "(" expr ")" | int
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args = single , args | single
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callees = "(" args ")" | "(" ")"
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facAux = callees facAux | callees
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single facAux | single
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fac = single facAux | single
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2023-09-22 01:45:47 +08:00
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term = fac | fac (MUL | DIV) fac
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expr = term (ADD | SUB) term
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