grpc/include/grpc++/impl/codegen/config.h

/*
 *
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 * modification, are permitted provided that the following conditions are
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 *
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 * notice, this list of conditions and the following disclaimer.
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 * in the documentation and/or other materials provided with the
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#ifndef GRPCXX_IMPL_CODEGEN_CONFIG_H
#define GRPCXX_IMPL_CODEGEN_CONFIG_H

#ifndef GRPC_CUSTOM_STRING
#include <string>
#define GRPC_CUSTOM_STRING std::string
#endif

/// The following macros are deprecated and appear only for users
/// with PB files generated using gRPC 1.0.x plugins. They should
/// not be used in new code
#define GRPC_OVERRIDE override  // deprecated
#define GRPC_FINAL final        // deprecated

namespace grpc {

typedef GRPC_CUSTOM_STRING string;

using std::to_string;

}  // namespace grpc

#endif  // GRPCXX_IMPL_CODEGEN_CONFIG_H