非贪婪的正则表达式不选择最接近的选择 [英] Non-greedy regex does not pick the closest choice

问题描述

我的正则表达式没有选择最接近内部文本的cont"对.我该如何解决?

My regex does not pick the closest 'cont' pair to the inner text. How can I fix that?

输入:

cont cont ItextI /cont /cont

正则表达式:

cont.*?I(.*?)I.*?/cont

匹配:

cont cont ItextI /cont

我需要的匹配:

cont ItextI /cont

推荐答案

cont(?:(?!/?cont).)*I(.*?)I(?:(?!/?cont).)*/cont

只会匹配最里面的块.

说明:

cont        # match "cont"
(?:         # Match...
 (?!/?cont) # (as long as we're not at the start of "cont" or "/cont")
 .          # any character.
)*          # Repeat any number of times.
I           # Match "I"
(.*?)       # Match as few characters as possible, capturing them.
I           # Match "I"
(?:         # Same as above
 (?!/?cont)
 .
)*
/cont       # Match "/cont"

这明确禁止 cont 或 /cont 出现在开头的 cont 和要捕获的文本之间(以及该文本之间和结束 /cont).

This explicitly forbids cont or /cont to appear between the opening cont and the to-be-captured text (and between that text and the closing /cont).

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