parser

type AllNode struct {
}

type AndNode struct {
	Operands []node
}

type HasNode struct {
	LabelName string
}

type LabelEqValueNode struct {
	LabelName string
	Value     string
}

type LabelInSetNode struct {
	LabelName string
	Value     StringSet
}

type LabelNeValueNode struct {
	LabelName string
	Value     string
}

type LabelNotInSetNode struct {
	LabelName string
	Value     StringSet
}

type Labels interface {
	// Get returns value and presence of the given labelName
	Get(labelName string) (value string, present bool)
}

type MapAsLabels map[string]string

type NotNode struct {
	Operand node
}

type OrNode struct {
	Operands []node
}

type PrefixVisitor struct {
	Prefix string
}

type Selector interface {
	// Evaluate evaluates the selector against the given labels expressed as a concrete map.
	Evaluate(labels map[string]string) bool

	// EvaluateLabels evaluates the selector against the given labels expressed as an interface.
	// This allows for labels that are calculated on the fly.
	EvaluateLabels(labels Labels) bool

	// String returns a string that represents this selector.
	String() string

	// UniqueID returns the unique ID that represents this selector.
	UniqueID() string

	// AcceptVisitor allows an external visitor to modify this selector.
	AcceptVisitor(v Visitor)
}

type StringSet []string

type Visitor interface {
	Visit(n interface{})
}