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// Copyright 2022 The OpenZipkin 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 propagation holds the required function signatures for Injection and
Extraction as used by the Zipkin Tracer.
Subpackages of this package contain officially supported standard propagation
implementations.
*/
package propagation
import "github.com/openzipkin/zipkin-go/model"
// Extractor function signature
type Extractor func() (*model.SpanContext, error)
// Injector function signature
type Injector func(model.SpanContext) error
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