Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

empty-union.cpp
// RUN: %clang_cc1 -emit-llvm -o - %s

union sigval { };
union sigval Test1;

union NonPODUnion { ~NonPODUnion(); };
union NonPODUnion Test2;