Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

p4.cpp
// RUN: %clang_cc1 -fsyntax-only -verify %s
// expected-no-diagnostics

// All of these function templates are distinct.
template<typename T> void f0(T) { }
template<typename T, typename U> void f0(T) { }
template<typename T, typename U> void f0(U) { }
void f0();
template<typename T> void f0(T*);
void f0(int);
template<int I> void f0();
template<typename T> void f0();