func:fits

fits(val, spec)

Return if the given instance fits the spec via structural typing. Use specFits() to check structural typing between two types. Also see is() and specIs() to check via nominal typing.

Examples:

fits("foo", Str)      >>  true
fits(123, Str)        >>  false
fits({equip}, Equip)  >>  true
fits({equip}, Site)   >>  false