package validate import "errors" // In validates whether a value is found in a slice of allowed values. func In[T comparable](allow []T) func(T) error { return func(value T) error { for _, cmp := range allow { if cmp == value { return nil } } return errors.New("Not an allowed value") } } // NotIn validates whether a value is not found in a slice of disallowed values. func NotIn[T comparable](allow []T) func(T) error { return func(value T) error { for _, cmp := range allow { if cmp == value { return errors.New("Not an allowed value") } } return nil } }