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32 lines
965 B
32 lines
965 B
4 months ago
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// Copyright 2018 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef BASE_TEST_METRICS_HISTOGRAM_ENUM_READER_H_
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#define BASE_TEST_METRICS_HISTOGRAM_ENUM_READER_H_
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#include <map>
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#include <string>
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#include "base/metrics/histogram_base.h"
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#include "base/optional.h"
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namespace base {
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using HistogramEnumEntryMap = std::map<HistogramBase::Sample, std::string>;
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// Find and read the enum with the given |enum_name| (with integer values) from
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// tools/metrics/histograms/enums.xml.
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//
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// Returns map { value => label } so that:
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// <int value="9" label="enable-pinch-virtual-viewport"/>
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// becomes:
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// { 9 => "enable-pinch-virtual-viewport" }
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// Returns empty base::nullopt on failure.
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base::Optional<HistogramEnumEntryMap> ReadEnumFromEnumsXml(
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const std::string& enum_name);
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} // namespace base
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#endif // BASE_TEST_METRICS_HISTOGRAM_ENUM_READER_H_
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