feat: implement closures

Author: kanersps

models/object/closure.go

@@ -0,0 +1,13 @@
+package object
+
+import "fmt"
+
+type Closure struct {
+	Fn   *CompiledFunction
+	Free []Object
+}
+
+func (c *Closure) Type() string { return CLOSURE }
+func (c *Closure) Inspect() string {
+	return fmt.Sprintf("Closure[%p]", c)
+}

models/object/object.go

@@ -16,6 +16,7 @@ const (
 	EXPORT            = "EXPORT"
 	IMPORT            = "IMPORT"
 	COMPILED_FUNCTION = "COMPILED_FUNCTION"
+	CLOSURE           = "CLOSURE"
 )
 
 type Object interface {