Implementation:Alibaba MNN Protobuf Any PB CC

Knowledge Sources	Alibaba_MNN Protocol Buffers
Domains	Serialization, Type_System
Last Updated	2026-02-10 12:00 GMT

Overview

Generated C++ implementation file for the Protocol Buffers Any well-known type, providing type-erased message wrapping.

Description

This file is the auto-generated implementation of google.protobuf.Any, which allows embedding arbitrary protobuf messages inside other messages without compile-time knowledge of their schema. MNN vendors this file as part of the full protobuf runtime to support parsing TensorFlow and Caffe model formats that rely on the Any type for flexible message encapsulation. The implementation includes serialization, deserialization, and type-URL based dispatch logic.

Usage

Vendored dependency used internally by MNN for parsing protobuf-based model formats (TensorFlow, Caffe). Not directly imported by end users.

Code Reference

Source Location

• Repository: Alibaba_MNN
• File: 3rd_party/protobuf/src/google/protobuf/any.pb.cc
• Lines: 1-352

Signature

namespace google {
namespace protobuf {
class Any final : public ::PROTOBUF_NAMESPACE_ID::Message {
  void PackFrom(const ::PROTOBUF_NAMESPACE_ID::Message& message);
  bool UnpackTo(::PROTOBUF_NAMESPACE_ID::Message* message) const;
};
}  // namespace protobuf
}  // namespace google

Import

#include "3rd_party/protobuf/src/google/protobuf/any.pb.h"

I/O Contract

Inputs

Name	Type	Required	Description
message	google::protobuf::Message	Yes	Any protobuf message to be packed into the Any wrapper

Outputs

Name	Type	Description
Any	google::protobuf::Any	Serialized Any message containing type_url and packed value bytes

Usage Examples

// MNN internal usage
google::protobuf::Any any_msg;
MyModelProto model;
any_msg.PackFrom(model);
// Later: any_msg.UnpackTo(&model);

Related Pages

• Environment:Alibaba_MNN_CPU_Build_Environment