要重用模式，您可以使用 (?n) 其中 n 是组重复.例如，您的实际模式:

To reuse a pattern, you could use (?n) where n is the number of the group to repeat. For example, your actual pattern :

(PAT),(PAT), ... ,(PAT)

可以替换为:

(PAT),(?1), ... ,(?1)

(?1) 与 (PAT) 的模式相同，无论 PAT 是什么.

(?1) is the same pattern as (PAT)whatever PAT is.

您可能有多个模式:

(PAT1),(PAT2),(PAT1),(PAT2),(PAT1),(PAT2),(PAT1),(PAT2)

可以简化为:

(PAT1),(PAT2),(?1),(?2),(?1),(?2),(?1),(?2)

或:

((PAT1),(PAT2)),(?1),(?1),(?1)

或:

((PAT1),(PAT2)),(?1){3}