Validating parameter using RegExp

[grahamehorner]

does the templating engine support validation of parameter values using regex? and/or displaying of error message valid regex is violated?

[nickwesselman]

Any sort of parameter validation beyond isRequired would be helpful. In my case, I'd like to validate that the parameter is a file of a particular name, which does exist.

[KathleenDollard]

When we move to the System.CommandLine, we will be able to validate on type in the parser.

I think we should have additional validation in the backlog:

• RegEx (probably)
• Min/Max range

Anything else?