Neon created LOGBACK-1446: ----------------------------- Summary: Make property references escapable Key: LOGBACK-1446 URL: https://jira.qos.ch/browse/LOGBACK-1446 Project: logback Issue Type: Improvement Components: logback-core Affects Versions: 1.3.0-alpha4, 1.2.3 Reporter: Neon Assignee: Logback dev list As you requested in my [PR|https://github.com/qos-ch/logback/pull/445#issuecomment-445518600] I created an account and issue for this matter. Short description from the pull request for searchability in JIRA: {panel} Currently it's not possible to escape strings like {{${some.property}}} in the logback.xml. This is escpecially problematic when trying to use a replacement command with named groups in the appender pattern. Therefore something like this will attempt to insert a property value instead of the named group: {{%replace(%msg){'(?<namedGroup>somestuffhere)', '${namedGroup}'}}}. I kept this example as simple (stupid) as possible for demonstration purposes since real world patterns where you need named groups often are pretty complex. {panel} As stated in my solution the implementation could be improved. Currently each of the characters {{$}}, {{{}}, {{:}} and {{}}} are affecting the token state even if the string doesn't represent a property reference, such as {{{test}}} or {{test:test}}. Maybe I'm missing something and the curly braces have a special meaning even without a preceding dollar sign, but otherwise the tokenizer could be more strict, so escaping would only need a single {{\}} in front of the dollar sign (like {{\${escaped}}}). -- This message was sent by Atlassian JIRA (v7.3.1#73012)