Regex describing a regex pattern?

Question

I am surprised that an answer to this is not easily found.

I am in the process of making a JSON schema. I have an object and one of it's properties is a string containing a regex pattern. This property must contain only regex.

So, this question is realistically two questions in one:

What is the regex pattern that describes regex patterns (javascript-compatible please)?

Secondly, how do I apply this to JSON schema (in the "pattern" property or even in the "patternProperty"¹ property)?

¹: I have no idea what purpose would require you to apply this in "patternProperty", but someone out there could find it useful

NOTE: Since, JSONschema is JSON and JSON is JavaScript-based, JavaScript scripters may find the solution (to the JSONschema-side of the question), as well as the problem, useful in their scripts.

Regexes can have nested parentheses. Therefore, they are not describable by a regular expression. Sorry. — SLaks, May 31 '16 at 02:23
@SLaks good point. I encourage you to put that as an answer. — , May 31 '16 at 02:24

score 1 · Accepted Answer · answered May 31 '16 at 02:40

1

Regexes can have nested parentheses.

Therefore, they are not describable by a regular expression.
Sorry.

answered May 31 '16 at 02:40

SLaks

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Python PyPi regex module, Boost, PCRE, Ruby and .NET regex engines can match nested parentheses, JS engine can't. – Wiktor Stribiżew May 31 '16 at 06:09

Regex describing a regex pattern?

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