Lifting over Unions
here’s a subtle but important consequence: in RE#, rewriting your regex using boolean algebra is always safe. factor out common prefixes, distribute over union, apply de Morgan’s laws - the matches won’t change. your regex is a specification of a set of strings, and the engine faithfully finds the leftmost-longest element of that set in the input. no surprises from alternation order, no “well it depends on how PCRE explores this search tree”. just set theory.。业内人士推荐体育直播作为进阶阅读
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Rules like these might be enough to catch snoozing mistakes in high-level code,
前款规定不影响被索赔的船舶所有人依照本章规定限制赔偿责任。