- // Copyright 2017, OpenCensus Authors
- //
- // 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 tag
-
- // Key represents a tag key.
- type Key struct {
- name string
- }
-
- // NewKey creates or retrieves a string key identified by name.
- // Calling NewKey consequently with the same name returns the same key.
- func NewKey(name string) (Key, error) {
- if !checkKeyName(name) {
- return Key{}, errInvalidKeyName
- }
- return Key{name: name}, nil
- }
-
- // Name returns the name of the key.
- func (k Key) Name() string {
- return k.name
- }
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