Create a new channel as a copy of main.
Rename main to:
Delete main? This cannot be undone.
// RUN: %clang_cc1 -E %s | FileCheck --strict-whitespace %s #define M1(a) (a+1) #define M2(b) b int ei_1 = M2(M1)(17); // CHECK: {{^}}int ei_1 = (17 +1);{{$}} int ei_2 = (M2(M1))(17); // CHECK: {{^}}int ei_2 = (M1)(17);{{$}}