prometheus/model/labelname.go

// Copyright 2013 Prometheus Team
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package model

import (
	"sort"
)

// A LabelName is a key for a LabelSet or Metric.  It has a value associated
// therewith.
type LabelName string

type LabelNames []LabelName

func (l LabelNames) Len() int {
	return len(l)
}

func (l LabelNames) Less(i, j int) bool {
	return sort.StringsAreSorted([]string{
		string(l[i]),
		string(l[j]),
	})
}

func (l LabelNames) Swap(i, j int) {
	l[i], l[j] = l[j], l[i]
}