79 lines
1.5 KiB
Go
79 lines
1.5 KiB
Go
/*
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* Copyright 2020 The Dragonfly Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package set
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type Set interface {
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Values() []interface{}
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Add(interface{}) bool
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Delete(interface{})
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Contains(...interface{}) bool
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Len() uint
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Range(func(interface{}) bool)
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}
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type set map[interface{}]struct{}
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func New() Set {
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return &set{}
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}
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func (s *set) Values() []interface{} {
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var result []interface{}
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s.Range(func(v interface{}) bool {
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result = append(result, v)
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return true
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})
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return result
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}
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func (s *set) Add(v interface{}) bool {
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_, found := (*s)[v]
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if found {
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return false
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}
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(*s)[v] = struct{}{}
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return true
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}
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func (s *set) Delete(v interface{}) {
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delete(*s, v)
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}
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func (s *set) Contains(vals ...interface{}) bool {
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for _, v := range vals {
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if _, ok := (*s)[v]; !ok {
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return false
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}
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}
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return true
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}
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func (s *set) Len() uint {
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return uint(len(*s))
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}
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func (s *set) Range(fn func(interface{}) bool) {
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for v := range *s {
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if !fn(v) {
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break
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}
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}
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}
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