| // Copyright 2018, 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 metricdata |
| |
| // LabelValue represents the value of a label. |
| // The zero value represents a missing label value, which may be treated |
| // differently to an empty string value by some back ends. |
| type LabelValue struct { |
| Value string // string value of the label |
| Present bool // flag that indicated whether a value is present or not |
| } |
| |
| // NewLabelValue creates a new non-nil LabelValue that represents the given string. |
| func NewLabelValue(val string) LabelValue { |
| return LabelValue{Value: val, Present: true} |
| } |