c++ - Best way to represent a array of std::optional in protobuf

Question

I need to map my "native" C++ struct that has an array(std::array, but I presume for std::vector solution is same) to protobuf.

So let' say I have

struct MyStruct{
    // Color is some class I already know how to map to PB
    std::array<std::optional<Color>, 4> opt_colors;
}

I am not sure what is the best way.

My current best guess is:

message ColorPb{
// some fields here
}

message OptColorPb{
  int32 idx = 1; // idx in array
  ColorPb color = 2; // value
}
message MyStructPb{
   // in case of vector I would also have a size, but for array it is known
   repeated OptColorPb opt_colors = 1;
}

question from:https://stackoverflow.com/questions/65923729/best-way-to-represent-a-array-of-stdoptional-in-protobuf

Answer 1

Waitting for answers