hussar-lang/hussar

package object

func NewEnvironment() *Environment {
    s := make(map[string]Object)
    return &Environment{store: s, outer: nil}
}

func NewEnclosedEnvironment(outer *Environment) *Environment {
    env := NewEnvironment()
    env.outer = outer

    return env
}

type Environment struct {
    store map[string]Object
    outer *Environment
}

func (e *Environment) Get(name string) (Object, bool) {
    obj, ok := e.store[name]
    if !ok && e.outer != nil {
        obj, ok = e.outer.Get(name)
    }
    return obj, ok
}

func (e *Environment) Set(name string, val Object) Object {
    e.store[name] = val
    return val
}