Fork channel

Create a new channel as a copy of main.

Rename channel

Rename main to:

Delete channel

Delete main? This cannot be undone.

debugger-support.mm
// RUN: %clang_cc1 -fdebugger-support -fsyntax-only -verify %s
// expected-no-diagnostics

@class NSString;
void testCompareAgainstPtr(int *ptr, NSString *ns) {
  if (ptr == 17) {}
  if (ns != 42) {}
}