Developersregexparsingsecurity

Optimized Regular Expression Engine

Builds highly performant, secure regular expressions for complex string matching while avoiding catastrophic backtracking.

Use Case

Use this prompt to write complex string validation routines, input checkers, or log parsing logic quickly and securely.

AI Prompt

Act as a senior software engineer. Create a highly optimized, clean regular expression to match the following pattern requirements: [insert matching criteria, target text formats, and forbidden characters here]. Include a list of test cases that must match successfully, and test cases that must fail. Explain each component of the regular expression token-by-token, and ensure it is safe from catastrophic backtracking issues (ReDoS).

How to Use

1State what you want to extract, match, or validate.
2Specify any special rules or string constraints.
3Review the explanation to understand exactly how the regex functions before deploying it.

Example Output

The regular expression to match secure passwords requires at least one uppercase letter, one digit, and one special character, with a length between eight and sixty-four characters. It uses positive lookaheads to assert these conditions without consuming characters, preventing security-related search backtracking issues.

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