C++ 20

[PARKGIBAEK]

What version of protobuf and what language are you using?
Version: master/v4.0.x

Language: C++

What operating system (Linux, Windows, ...) and version?
Windows 10

What runtime / compiler are you using (e.g., python version or gcc version)
MSVC++ 20

What did you do?
Steps to reproduce the behavior:

1. complie message class without string type using protoc.exe.
   

2. add file ~.pb.h & ~.pb.cc to my project.

3. tried to compile.

4. See error.

5. So I input macro.
   

6. But still same.

What did you expect to see

What did you see instead?

Make sure you include information that can help us debug (full error message, exception listing, stack trace, logs).

Anything else we should know about your project / environment

[acozzette]

I checked out the v3.17.0 tag and the string is_pod doesn't appear anywhere in the source (except CHANGES.txt). I suspect that you must have an old version of the protobuf runtime lying around that is causing the error.

[PARKGIBAEK]

I checked out the v3.17.0 tag and the string is_pod doesn't appear anywhere in the source (except CHANGES.txt). I suspect that you must have an old version of the protobuf runtime lying around that is causing the error.

Sorry for this, I tested it only v4.x for this issue.
As I copied and used other issue reports as they were, there was a mistake.

[acozzette]

No problem!