Compare on Well Known Types is not fully supported

[shouichi]

Hi do you have plan to support Compare method on types.Timestamp? For example,

import "google/protobuf/timestamp.proto";
import "github.com/gogo/protobuf/gogoproto/gogo.proto";

option (gogoproto.compare_all) = true

message Foo {
  google.protobuf.Timestamp timestamp = 1;
}

This gives me this.Timestamp.Compare undefined (type *types.Timestamp has no field or method Compare) compilation error.

Moreover, it seems that ptypes package doesn't have enough support; e.g., gostring_all option doesn't work neither.

Thanks!

[awalterschulze]

GoString methods are defined for the types, how does gostring_all break?

[awalterschulze]

6a92c87

I found another issue with compare #231
and I have added all current issues to the documentation.

Compare is now supported for most well known types, except struct, because compare does not support oneof yet.
It also doesn't work when timestamp is generated as time.Time or duration is generated as time.Duration.
These are all fixable, except maybe for maps, but I am too sick to do that now.
And I hope someone else will jump in.