37 lines
976 B
C++
37 lines
976 B
C++
// Copyright The OpenTelemetry Authors
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "opentelemetry/common/attribute_value.h"
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#include "opentelemetry/nostd/function_ref.h"
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#include "opentelemetry/version.h"
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OPENTELEMETRY_BEGIN_NAMESPACE
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namespace common
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{
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/**
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* Supports internal iteration over a collection of key-value pairs.
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*/
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class KeyValueIterable
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{
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public:
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virtual ~KeyValueIterable() = default;
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/**
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* Iterate over key-value pairs
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* @param callback a callback to invoke for each key-value. If the callback returns false,
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* the iteration is aborted.
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* @return true if every key-value pair was iterated over
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*/
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virtual bool ForEachKeyValue(nostd::function_ref<bool(nostd::string_view, common::AttributeValue)>
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callback) const noexcept = 0;
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/**
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* @return the number of key-value pairs
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*/
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virtual size_t size() const noexcept = 0;
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};
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} // namespace common
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OPENTELEMETRY_END_NAMESPACE
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