A simple parser for Google proto source files to protopuf C++ headers

• default usage is to convert all proto sources in one directory into protopuf headers

git clone https://github.com/ArchNemSyS/proto-to-protopuf.git
cd proto-to-protopuf
cmake .
make

• copy proto_parser executable and .proto files to an empty directory
• run ./proto_parser
• with any luck the parsed c++ protopuf headers will be in the protopuf subdirectory

• only supports proto version 2 files and common field types - (should be relatively easy to overload)
• supports includes but cannot resolve enums and messages with the same name
• doesnt resolve symbol dependancy order - ie forward declares / reordering of declarations
• ignores namespace/package attributes
• tokenizer is confused by comment looking string literals aka - file paths // and /*
• doesn't generate make files or wrapper classes etc

• /* multiline */
• // singleline

import "filename.proto";

--convert--

include "filename.proto.h"

enum TYPE {
    FIELD_NAME = INT;
    FIELD_NAME = INT;
}

--convert--

enum TYPE {
   FIELD_NAME = INT,
   FIELD_NAME = INT,
}

message Student {
    uint32 id = 1;
    string name = 3;
}

message Class {
    string name = 8;
    repeated Student students = 3;
}

--convert--

using Student = message<
    uint32_field<"id", 1>, 
    string_field<"name", 3>
>;

using Class = message<
    string_field<"name", 8>, 
    message_field<"students", 3, Student, repeated>
>;