The second copy looks correct to me.
On Tue, Apr 3, 2018 at 5:26 PM Shyam S R <sr.sh...@gmail.com> wrote:
> Hi all,
>
> Is there a favored way to copy a protobuf message from one type to another
> ? A little background:
>
> I have two messages for example:
> message A {
> enum foo {
> field1 = 0;
> field2 = 1;
> }
> int32 id;
> string name;
> foo type;
> }
>
> message B {
> enum foo {
> field1 = 0;
> field2 = 1;
> field3 =2;
> }
> int32 id;
> string name;
> foo type;
> }
>
> I have references to these messages and want to implement this method:
> void copy(A &in, B &out) {
> // in's contents need to be copied to out
> }
>
> the only difference between A and B is the enum field and they are named
> different. There could be more messages within the message types A and B
> with the same fields, but only enum's having an extra field in B. How
> should i go about this ?
>
> Do the following options look feasible :
> void copy(A &in, B &out) {
> // in's contents need to be copied to out
> cast in to type B
> out = in;
> }
>
> void copy(A &in, B &out) {
> // in's contents need to be copied to out
> Use in.SerializeAsString() and pipe it to out.ParseFromString()
> }
>
> Appreciate the community's help!
>
> Thanks!
>
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