func:is

is(val, spec)

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

Note that dict values will only match the generic sys.Dict type. Use fits() for structural type matching.

Examples:

is("hi", Str)       >>  true
is("hi", Dict)      >>  false
is({}, Dict)        >>  true
is({equip}, Equip)  >>  false
is(Str, Spec)       >>  true

def	func:is
is	func
lib	lib:xeto
name	is

feature	Feature namespace of definitions formatted as feature:name
func	Axon function