There is code to add a simpler error message in one particular case: when the user has forgotten square brackets around the pattern. But it is too specific: it requires that patterns start with either [ or ([:
Patterns can have arbitrarily nested structure, so the pattern can start with an arbitrary number of open parentheses. The check needs to be generalized.
There is code to add a simpler error message in one particular case: when the user has forgotten square brackets around the pattern. But it is too specific: it requires that patterns start with either
[or([:https://github.com/oasis-open/cti-pattern-validator/blob/2dafa44d3ea37faefaaa92e703f2ac481485de31/stix2patterns/v21/validator.py#L98
Patterns can have arbitrarily nested structure, so the pattern can start with an arbitrary number of open parentheses. The check needs to be generalized.