如何从正则表达式子模式中排除单词？ [英] How to exclude a word from regex subpattern?
问题描述
我正在使用Delphi 7和TDIPerlRegEx。我在句子的某些部分中寻找动词，其中包含一些特定的部分来标识动词。
I am using Delphi 7 and TDIPerlRegEx. I am looking for verbs in parts of sentence which contain some specific part to identify the verb.
s1 := '(I|you|he|she|it|we|they|this|that|these|those)';
s2 := (can|should|would|could|must|want to|have to|had to|might);
RegEx_Seek_1.MatchPattern := '(*UCP)(?m) \b'+s1+'\b \b'+s2+'\b \K([^ß\W]\w{2,15})\b';
错误地包含在结果中的关键字是 not；但应排除在外：
The key word which is wrongly included in result is "not"; but should be exluded:
示例文本：
...您不应 每个...的优势
... that you should not ßeat of every ...
结果中应包含以下动词：
示例文本：
Verb like this should be included in result: Sample text:
不要让他伸出他的手...
lest he should put forth his hand ...
现在，我将用ß符号解释该部分。 ß符号表示原始文本带有 not字样，然后是动词。但是我在先前的交互或会话中更改了此文本，因此我现在正在使用的源文本如上所述。模式（[^ ß\W] \w {2,15}）应该避免使用否定的单词。这也是为什么不包括否定动词的原因。
Now I would explain the part with ß sign. The ß sign says, that the original text had "not" word, and then the verb is followed. But I changed this text in previous interaction or session so the source text which I am working now is as stated above. The pattern ([^ß\W]\w{2,15}) should avoid the word which is used in negative sense. This is also why do not include the "negative" verb.
所以问题的关键是如何从捕获的文本中排除 not一词； -由此模式捕获，该模式为（[^ ß\W] \w {2,15}）或（＼ ＼W {3,15}）。
So point of the question is how to exclude the "not" word from the captured text; that is - captured by this pattern, which is either ([^ß\W]\w{2,15}) or (\W{3,15}) .
我正在使用此模式替换文本中的子字符串。
I am using this pattern to replace substrings in text.
需要更多示例文本吗？
bear 。
所以我可能带走了她的
他们可能会住在一起
他们不可能不能一起住
说，
在第3组中，我希望匹配：
for 熊，已摄取（或者可能是 have 而不是已摄取），暂停和说。
我试图排除 not 单词，因此必须将 not 之后的任何动词或单词排除在外第三组或完全比赛。我只对第3组感兴趣。组1和2仅指定动词之前的替代项。
In group 3 I expect match:
for bear, taken (or posibly have instead of taken), dwell and say.
I am trying to exclude the not word, so any verb or word following not must be excluded from 3rd group or the match completely. I am interested about group 3 only. Group 1 and 2 just specifies alternatives preceding the verb.
推荐答案
您可以使用分支重置组以匹配空字符串，如果整个 情态动词后面的词，否则为概念动词：
You may use a branch reset group to match an empty string if there is not as a whole word after a modal verb, or a notional verb otherwise:
\b(I|you|he|she|it|we|they|this|that|these|those)\s+(can|should|would|could|must|want to|have to|had to|might)\s+\K(?|(?=not\b)()|([^ß\W]\w{2,15})\b)
请参见 regex演示
详细信息
-
\b-单词边界 -
（我|您|他|她|它|我们|他们|这个|那个|那些|那些）-组1中的代词之一 -
\s +-1+空格（它已经作为相邻两边的单词边界t个组） -
（可以|应该|将|必须|想要|必须|必须|可能）-情态动词之一 -
\s +-1+空格 -
\K-匹配重置运算符 -
（？|（？= not\b）（）|（[^ ß\W] \w {2,15}）\b）-与
- 匹配的分支重置组
（？= not\b）（）-如果在整个单词的右边紧接有not，请捕获第3组中的空字符串 -
|-或（在此为其他） -
（[[^ ß\W] \w {2,15}）\b-将以外的任何其他字符char匹配并捕获到组3中ß，然后是2到15个带有字符边界的单词字符。
\b- a word boundary(I|you|he|she|it|we|they|this|that|these|those)- one of the pronouns in the group 1\s+- 1+ whitespaces (it is already acting as a word boundary on both sides of the adjacent groups)(can|should|would|could|must|want to|have to|had to|might)- one ofthe modal verbs\s+- 1+ whitespaces\K- match reset operator(?|(?=not\b)()|([^ß\W]\w{2,15})\b)- the branch reset group matching either(?=not\b)()- if there isnotas whole word immediately to the right, capture an empty string into Group 3|- or (here, else)([^ß\W]\w{2,15})\b- match and capture into Group 3 any word char other thanßand then 2 to 15 word chars with a word boundary to follow.
请注意，
（？m）-PCRE_MULTILINE-仅在您需要<字符类之外的code> ^ 和$匹配行的开始和结束而不是整个字符串。由于您的模式没有此类锚点，因此（？m）是多余的。Note that
(?m)-PCRE_MULTILINE- is only necessary if you want your^and$outside of character classes match start and end of lines rather than the whole string. Since your pattern has no such anchors,(?m)is redundant.这篇关于如何从正则表达式子模式中排除单词？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
- 匹配的分支重置组
