values

type Array interface {
	Value
	Get(i int) Value
	Set(i int, v Value)
	Append(v Value)
	Len() int
	Range(func(i int, v Value))
	Sort(func(i, j Value) bool)
}

type BinaryFuncSignature struct {
	Operator    ast.OperatorKind
	Left, Right semantic.Type
}

type BinaryFunction func(l, r Value) Value

type Duration int64

type Function interface {
	Value
	HasSideEffect() bool
	Call(args Object) (Value, error)
}

type Object interface {
	Value
	Get(name string) (Value, bool)
	Set(name string, v Value)
	Len() int
	Range(func(name string, v Value))
}

type Time int64

type Typer interface {
	Type() semantic.Type
}

type Value interface {
	Typer
	Str() string
	Int() int64
	UInt() uint64
	Float() float64
	Bool() bool
	Time() Time
	Duration() Duration
	Regexp() *regexp.Regexp
	Array() Array
	Object() Object
	Function() Function
	Equal(Value) bool
}