From bf0b8798d6de1023f7a9b7a5539fefa58f4d47bb Mon Sep 17 00:00:00 2001
From: Muxi Yan <mxyan@google.com>
Date: Wed, 25 Apr 2018 18:16:21 -0700
Subject: [PATCH] Provide protocol for generics

---
 src/compiler/objective_c_generator.cc   | 2 +-
 src/objective-c/ProtoRPC/ProtoService.h | 6 ++++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/compiler/objective_c_generator.cc b/src/compiler/objective_c_generator.cc
index 39f68cb9565..7d4d4d1f5a4 100644
--- a/src/compiler/objective_c_generator.cc
+++ b/src/compiler/objective_c_generator.cc
@@ -248,7 +248,7 @@ void PrintMethodImplementations(Printer* printer,
                 " */\n");
   printer.Print(vars,
                 "@interface $service_class$ :"
-                " GRPCProtoService<$service_class$>\n");
+                " GRPCProtoService<$service_class$, GRPCProtoServiceInit>\n");
   printer.Print(
       "- (instancetype)initWithHost:(NSString *)host"
       " NS_DESIGNATED_INITIALIZER;\n");
diff --git a/src/objective-c/ProtoRPC/ProtoService.h b/src/objective-c/ProtoRPC/ProtoService.h
index 29c4e9be360..c411bed60f0 100644
--- a/src/objective-c/ProtoRPC/ProtoService.h
+++ b/src/objective-c/ProtoRPC/ProtoService.h
@@ -22,6 +22,12 @@
 @protocol GRXWriteable;
 @class GRXWriter;
 
+@protocol GRPCProtoServiceInit
+
+- (instancetype)initWithHost:(NSString *)host;
+
+@end
+
 __attribute__((deprecated("Please use GRPCProtoService."))) @interface ProtoService
     : NSObject -
       (instancetype)initWithHost : (NSString *)host packageName