| // Copyright 2021 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package trie |
| |
| import ( |
| "strconv" |
| "sync/atomic" |
| ) |
| |
| // Scope represents a distinct collection of maps. |
| // Maps with the same Scope can be equal. Maps in different scopes are distinct. |
| // Each Builder creates maps within a unique Scope. |
| type Scope struct { |
| id int32 |
| } |
| |
| var nextScopeId int32 |
| |
| func newScope() Scope { |
| id := atomic.AddInt32(&nextScopeId, 1) |
| return Scope{id: id} |
| } |
| |
| func (s Scope) String() string { |
| return strconv.Itoa(int(s.id)) |
| } |
