Regex for keywords

f#, regex

Solution

This can be accomplished using negative look aheads and behinds

    (?<![a-zA-Z0-9])(class|function|static|this|return)(?![a-zA-Z0-9])

or with out them.

    ([^a-zA-Z0-9])(class|function|static|this|return)([^a-zA-Z0-9])

Problem

How can I write a Regex to represent certain keywords without any letter/number following or preceding them? (symbols and spaces are optional) I tried to write this, but it's doesn't seem to work: ``` let resWord = "[class|function|static|this|return]" let keyword = new Regex("[^[^a-zA-Z0-9]]"+resWord+"[^[a-zA-Z0-9]$]") ``` I'm new to Regex, so please excuse me if it's a stupid question :)

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