// Copyright 2013-2015 CoreOS, Inc.
//
// 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 semver

import (
	"sort"
)

type Versions []*Version

func (s Versions) Len() int {
	return len(s)
}

func (s Versions) Swap(i, j int) {
	s[i], s[j] = s[j], s[i]
}

func (s Versions) Less(i, j int) bool {
	return s[i].LessThan(*s[j])
}

// Sort sorts the given slice of Version
func Sort(versions []*Version) {
	sort.Sort(Versions(versions))
}