Support ECMAScript unicode-mode RegExp usage for 'pattern' and 'patternProperties'

[djgoku]

Instead of duplicating everything here is my problem.

If you want me to copy anything for this issue I can.

awslabs/amazon-ecs-intellisense-schema#8

I am looking to see how I can support Python Unicode regex so I can use this json schema.

[sirosen]

If I have understood the issue correctly, this is a matter of a schema using an ECMA regex syntax which python (the language) does not support.

However, luckily, we're using regress here to provide ECMA-compatible regex support for format. Which means that I need to know what type of match is failing, and then with through instrumenting the right support.

[djgoku]

Thanks for looking into this. I am opening to helping if I can. I'll try to check out the errors again tomorrow.

[sirosen]

To put all the information for this in one place (with some fun emojis):

• 🔍 The issue in question is that pattern usage needs to support unicode-mode regexps, which can contain special escape patterns
  • 📖 https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp/unicode#description
• 🤞 Will need to assess whether or not regress already implements this
• 🛠️ There is a well-defined path for plugging in an alternative implementation of pattern and patternProperties
  • 🤓 This looks interesting and doable, but will require some careful reading through jsonschema source
• ❓ I still need some nice MRE for this issue so that I can test the results
  • 🥳 that's a great place to help out if anyone has time -- create a small example of a schema with a regex which requires unicode-mode, and positive and negative cases for that schema