1 files changed, 76 insertions, 17 deletions

diff --git a/src/compiler/cpp_generator.h b/src/compiler/cpp_generator.h
index 03621c8794..99a60a2eae 100644
--- a/src/compiler/cpp_generator.h
+++ b/src/compiler/cpp_generator.h
@@ -34,7 +34,23 @@
 #ifndef GRPC_INTERNAL_COMPILER_CPP_GENERATOR_H
 #define GRPC_INTERNAL_COMPILER_CPP_GENERATOR_H
 
-#include "src/compiler/config.h"
+// cpp_generator.h/.cc do not directly depend on GRPC/ProtoBuf, such that they
+// can be used to generate code for other serialization systems, such as
+// FlatBuffers.
+
+#include <memory>
+#include <vector>
+
+#ifndef GRPC_CUSTOM_STRING
+#include <string>
+#define GRPC_CUSTOM_STRING std::string
+#endif
+
+namespace grpc {
+
+typedef GRPC_CUSTOM_STRING string;
+
+}  // namespace grpc
 
 namespace grpc_cpp_generator {
 
@@ -48,37 +64,80 @@ struct Parameters {
   grpc::string grpc_search_path;
 };
 
+// An abstract interface representing a method.
+struct Method {
+  virtual ~Method() {}
+
+  virtual grpc::string name() const = 0;
+
+  virtual grpc::string input_type_name() const = 0;
+  virtual grpc::string output_type_name() const = 0;
+
+  virtual bool NoStreaming() const = 0;
+  virtual bool ClientOnlyStreaming() const = 0;
+  virtual bool ServerOnlyStreaming() const = 0;
+  virtual bool BidiStreaming() const = 0;
+};
+
+// An abstract interface representing a service.
+struct Service {
+  virtual ~Service() {}
+
+  virtual grpc::string name() const = 0;
+
+  virtual int method_count() const = 0;
+  virtual std::unique_ptr<const Method> method(int i) const = 0;
+};
+
+struct Printer {
+  virtual ~Printer() {}
+
+  virtual void Print(const std::map<grpc::string, grpc::string> &vars,
+                     const char *template_string) = 0;
+  virtual void Print(const char *string) = 0;
+  virtual void Indent() = 0;
+  virtual void Outdent() = 0;
+};
+
+// An interface that allows the source generated to be output using various
+// libraries/idls/serializers.
+struct File {
+  virtual ~File() {}
+
+  virtual grpc::string filename() const = 0;
+  virtual grpc::string filename_without_ext() const = 0;
+  virtual grpc::string package() const = 0;
+  virtual std::vector<grpc::string> package_parts() const = 0;
+
+  virtual int service_count() const = 0;
+  virtual std::unique_ptr<const Service> service(int i) const = 0;
+
+  virtual std::unique_ptr<Printer> CreatePrinter(grpc::string *str) const = 0;
+};
+
 // Return the prologue of the generated header file.
-grpc::string GetHeaderPrologue(const grpc::protobuf::FileDescriptor *file,
-                               const Parameters &params);
+grpc::string GetHeaderPrologue(File *file, const Parameters &params);
 
 // Return the includes needed for generated header file.
-grpc::string GetHeaderIncludes(const grpc::protobuf::FileDescriptor *file,
-                               const Parameters &params);
+grpc::string GetHeaderIncludes(File *file, const Parameters &params);
 
 // Return the includes needed for generated source file.
-grpc::string GetSourceIncludes(const grpc::protobuf::FileDescriptor *file,
-                               const Parameters &params);
+grpc::string GetSourceIncludes(File *file, const Parameters &params);
 
 // Return the epilogue of the generated header file.
-grpc::string GetHeaderEpilogue(const grpc::protobuf::FileDescriptor *file,
-                               const Parameters &params);
+grpc::string GetHeaderEpilogue(File *file, const Parameters &params);
 
 // Return the prologue of the generated source file.
-grpc::string GetSourcePrologue(const grpc::protobuf::FileDescriptor *file,
-                               const Parameters &params);
+grpc::string GetSourcePrologue(File *file, const Parameters &params);
 
 // Return the services for generated header file.
-grpc::string GetHeaderServices(const grpc::protobuf::FileDescriptor *file,
-                               const Parameters &params);
+grpc::string GetHeaderServices(File *file, const Parameters &params);
 
 // Return the services for generated source file.
-grpc::string GetSourceServices(const grpc::protobuf::FileDescriptor *file,
-                               const Parameters &params);
+grpc::string GetSourceServices(File *file, const Parameters &params);
 
 // Return the epilogue of the generated source file.
-grpc::string GetSourceEpilogue(const grpc::protobuf::FileDescriptor *file,
-                               const Parameters &params);
+grpc::string GetSourceEpilogue(File *file, const Parameters &params);
 
 }  // namespace grpc_cpp_generator