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+/*
+ *
+ * Copyright 2016, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+/**
+ * "X-macro" file that lists the flags names of Apple's Network Reachability API, along with a nice
+ * Objective-C method name used to query each of them.
+ *
+ * Example usage: To generate a dictionary from flag value to name, one can do:
+
+ NSDictionary *flagNames = @{
+#define GRPC_XMACRO_ITEM(methodName, FlagName) \
+ @(kSCNetworkReachabilityFlags ## FlagName): @#methodName,
+#include "GRXReachabilityFlagNames.xmacro.h"
+#undef GRPC_XMACRO_ITEM
+ };
+
+ XCTAssertEqualObjects(flagNames[@(kSCNetworkReachabilityFlagsIsWWAN)], @"isCell");
+
+ */
+
+#ifndef GRPC_XMACRO_ITEM
+#error This file is to be used with the "X-macro" pattern: Please #define \
+ GRPC_XMACRO_ITEM(methodName, FlagName), then #include this file, and then #undef \
+ GRPC_XMACRO_ITEM.
+#endif
+
+GRPC_XMACRO_ITEM(isCell, IsWWAN)
+GRPC_XMACRO_ITEM(reachable, Reachable)
+GRPC_XMACRO_ITEM(transientConnection, TransientConnection)
+GRPC_XMACRO_ITEM(connectionRequired, ConnectionRequired)
+GRPC_XMACRO_ITEM(connectionOnTraffic, ConnectionOnTraffic)
+GRPC_XMACRO_ITEM(interventionRequired, InterventionRequired)
+GRPC_XMACRO_ITEM(connectionOnDemand, ConnectionOnDemand)
+GRPC_XMACRO_ITEM(isLocalAddress, IsLocalAddress)
+GRPC_XMACRO_ITEM(isDirect, IsDirect)