不跟随特定字符(?)时如何使用正则表达式匹配字符(')? [英] How can I use regex to match a character (') when not following a specific character (?)?

问题描述

只要不带问号，我如何编写正则表达式模式以使用特定的分隔符来分割字符串?

How can I write a regex pattern to split a string by a specific delimiter as long as it's not preceded by a question mark?

我编写了一个解析器，将EDIFACT消息拆分为段，组合和元素.但是在EDI标准中，问号是转义字符.因此，请分割此字符串:

I've written a parser that splits an EDIFACT message into segments, composites and elements. But in the EDI standard the question mark is an escape character. So to split this string:

'PRI+2.005:1+9022.5'RAD+RRHANB97+120814'

我可以使用string.Split('\'')，然后使用string.split('+')，然后使用string.split(':')获得PRI，2.005、1、9022.5，依此类推但是，这些字符可以用问号转义:

I can use string.Split('\''), and then string.split('+') and then string.split(':') to get PRI, 2.005, 1, 9022.5 and so on However, these characters can be escaped by a question mark:

'PRI+2.005?+3.2:1+9022.5'RAD?'R+RRHANB97+120814'

现在应该是PRI，2.005 + 3.2、1、9022.5，RAD'R，RRHANB97.

which should now be PRI, 2.005+3.2, 1, 9022.5, RAD'R, RRHANB97.

有人可以帮助匹配'而不是'的正则表达式吗?

Can someone help with a regular expression that would match the ' and not the ?'?

谢谢

推荐答案

使用后向负向:

(?<!\?)'

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