transform

var (
	// ErrUnimplementedAgg is returned when a transformation of an unimplemented
	// aggregator is attempted.
	ErrUnimplementedAgg = errors.New("unimplemented aggregator")

	// ErrIncompatibleAgg is returned when
	// aggregation.Kind implies an interface conversion that has
	// failed
	ErrIncompatibleAgg = errors.New("incompatible aggregation type")

	// ErrUnknownValueType is returned when a transformation of an unknown value
	// is attempted.
	ErrUnknownValueType = errors.New("invalid value type")

	// ErrContextCanceled is returned when a context cancellation halts a
	// transformation.
	ErrContextCanceled = errors.New("context canceled")

	// ErrTransforming is returned when an unexected error is encoutered transforming.
	ErrTransforming = errors.New("transforming failed")
)