Function needInit

http/codegen/service_data.go:3059–3083

needInit returns true if and only if the given type is or makes use of user types.

(dt expr.DataType)

// needInit returns true if and only if the given type is or makes use of user
// types.
func needInit(dt expr.DataType) bool {
	if dt == expr.Empty {
		return false
	}
	switch actual := dt.(type) {
	case expr.Primitive:
		return false
	case *expr.Array:
		return needInit(actual.ElemType.Type)
	case *expr.Map:
		return needInit(actual.KeyType.Type) ||
			needInit(actual.ElemType.Type)
	case *expr.Object:
		for _, nat := range *actual {
			if needInit(nat.Attribute.Type) {
				return true
			}
		}
		return false
	case expr.UserType:
		return true
	default:
		panic(fmt.Sprintf("unknown data type %T", actual)) // bug
	}
}

// upgradeParams returns the data required to render the websocket_upgrade
// template.