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.
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，这一点在体育直播中也有详细论述
Дмитрий Воронин
2024年12月23日 星期一 新京报。关于这个话题，搜狗输入法2026提供了深入分析