Monkey/object/object.go

package object

import "fmt"

// ObjType type of object
type ObjType string

const (
	IntegerObj = "INTEGER"
	BooleanObj = "BOOLEAN"
	NullObj    = "NULL"
)

// Object source code as an Object
type Object interface {
	Type() ObjType
	Inspect() string
}

type Integer struct {
	Value int64
}

func (i *Integer) Type() ObjType   { return IntegerObj }
func (i *Integer) Inspect() string { return fmt.Sprintf("%d", i.Value) }

type Boolean struct {
	Value bool
}

func (b *Boolean) Type() ObjType   { return BooleanObj }
func (b *Boolean) Inspect() string { return fmt.Sprintf("%t", b.Value) }

type Null struct{}

func (n *Null) Type() ObjType   { return NullObj }
func (n *Null) Inspect() string { return "null" }