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src/viam/sdk/common/grpc_client_fwd.hpp.in

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+#pragma once
+
+#cmakedefine VIAMCPPSDK_GRPCXX_LEGACY_CLIENT_FWD
+
+#ifndef VIAMCPPSDK_GRPCXX_LEGACY_CLIENT_FWD
+
+// Forward declaration file for grpc ClientContext and ClientReaderInterface<T>.
+// This file provides includes for recent (>= 1.32.0) versions of grpc.
+
+namespace grpc {
+
+class ClientContext;
+
+template <typename>
+class ClientReaderInterface;
+
+}  // namespace grpc
+
+namespace viam {
+namespace sdk {
+
+using GrpcClientContext = ::grpc::ClientContext;
+
+template <typename T>
+using GrpcClientReaderInterface = ::grpc::ClientReaderInterface<T>;
+
+}  // namespace sdk
+}  // namespace viam
+
+#else
+
+// Forward declaration file for grpc ClientContext and ClientReaderInterface<T>.
+// This file provides includes for the oldest supported versions of grpc (< 1.32.0).
+
+namespace grpc_impl {
+
+class ClientContext;
+
+template <typename>
+class ClientReaderInterface;
+
+}  // namespace grpc_impl
+
+namespace viam {
+namespace sdk {
+
+using GrpcClientContext = ::grpc_impl::ClientContext;
+
+template <typename T>
+using GrpcClientReaderInterface = ::grpc_impl::ClientReaderInterface<T>;
+
+}  // namespace sdk
+}  // namespace viam
+
+#endif