I need a regex that:

• won't match if the string is equal to any of a series of strings
• won't match if any of another series of sub-strings is contained anywhere within
• and will match only up until any of a set of certain delimiter characters.

I've got the first two requirements, but can't figure out how to add in the last part:

^(?:((?!^fill$)(?!^style$)(?!->)[^;:]))*$

Will not match 'fill' or 'style' (but will match 'fills' or 'astyle'). Will not match if '->' is anywhere inside. (e.g. don't match 'a->b') However a : or a ; will cause no match, rather than matching up until the first occurrence of either of those characters. e.g.

Will:

should return 'Will' but currently returns nothing.

CodePudding user response：

You can use

^(?!(?:fill|style)$|.*(?:-[>-]|<-))[^;:] 

See the regex demo.

Details:

• ^ - start of string
• (?!(?:fill|style)$|.*(?:-[>-]|<-)) - immediately to the right, there can't be:
  • (?:fill|style)$ - fill or style (followed by the end of string)
  • | - or
  • .*(?:-[>-]|<-) - after any zero or more chars as many as possible, --, ->, <- (note the <-> alternative is missing since <- covers it)
• [^;:] - any zero or more chars other than ; and : as many as possible