Consider 'computedFrom' support

[MaximBalaganskiy]

It would be nice to have. I could work around it by triggering validation in passes analog if it existed

[plwalters]

What is computedFrom? Does equality not cover this?

[MaximBalaganskiy]

It does for password and confirmation, but more complex scenarios may require triggering validation on other fields. Let's say you picked a state and depending on that your prices might become invalid...

[plwalters]

All of the relevant rules are re-evaluated upon validating the object so this shouldn't be needed.

For example -

firstName = 'Blue';
@equality('firstName') lastName = 'Blue';

// lastName is valid

person.firstName = 'Red';

// reporter.subscribe returns `Last name does not equal first name`