Function AsUnion

expr/types.go:231–242

AsUnion returns the type underlying union if any, nil otherwise.

(dt DataType)

// AsUnion returns the type underlying union if any, nil otherwise.
func AsUnion(dt DataType) *Union {
	switch t := dt.(type) {
	case *UserTypeExpr:
		return AsUnion(t.Type)
	case *ResultTypeExpr:
		return AsUnion(t.Type)
	case *Union:
		return t
	default:
		return nil
	}
}

// IsObject returns true if the data type is an object.
func IsObject(dt DataType) bool { return AsObject(dt) != nil }