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53 lines
1.5 KiB
53 lines
1.5 KiB
4 months ago
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// Copyright 2020 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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//
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// This file contains helpers for working with enums that require
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// both enum->string and string->enum conversions.
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#ifndef UTIL_ENUM_NAME_TABLE_H_
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#define UTIL_ENUM_NAME_TABLE_H_
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#include <array>
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#include <utility>
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#include "absl/strings/string_view.h"
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#include "platform/base/error.h"
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#include "util/osp_logging.h"
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namespace openscreen {
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constexpr char kUnknownEnumError[] = "Enum value not in array";
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// TODO(jophba): move to a proper class once we can inherit from array
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// properly (in C++17).
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template <typename Enum, size_t Size>
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using EnumNameTable = std::array<std::pair<const char*, Enum>, Size>;
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// Get the name of an enum from the enum value.
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template <typename Enum, size_t Size>
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ErrorOr<const char*> GetEnumName(const EnumNameTable<Enum, Size>& map,
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Enum enum_) {
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for (auto pair : map) {
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if (pair.second == enum_) {
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return pair.first;
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}
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}
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return Error(Error::Code::kParameterInvalid, kUnknownEnumError);
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}
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// Get the value of an enum from the enum name.
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template <typename Enum, size_t Size>
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ErrorOr<Enum> GetEnum(const EnumNameTable<Enum, Size>& map,
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absl::string_view name) {
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for (auto pair : map) {
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if (pair.first == name) {
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return pair.second;
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}
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}
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return Error(Error::Code::kParameterInvalid, kUnknownEnumError);
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}
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} // namespace openscreen
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#endif // UTIL_ENUM_NAME_TABLE_H_
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