clang/test/Modules/macro-redefinition.cpp

   1 // RUN: %clang_cc1 -fmodules -x c++-module-map %s -fmodule-name=__usr_include -verify
   2 // RUN: %clang_cc1 -fmodules -x c++-module-map %s -fmodule-name=__usr_include -verify -DIMPORT
   3
   4 module __usr_include {
   5   module stddef {}
   6   module stdlib {}
   7 }
   8
   9 #pragma clang module contents
  10
  11 // expected-no-diagnostics
  12
  13 #pragma clang module begin __usr_include.stddef
  14   #define NULL 0
  15 #pragma clang module end
  16
  17 #pragma clang module begin __usr_include.stdlib
  18   #ifdef IMPORT
  19     #pragma clang module import __usr_include.stddef
  20   #else
  21     #pragma clang module begin __usr_include.stddef
  22       #define NULL 0
  23     #pragma clang module end
  24   #endif
  25
  26   void *f() { return NULL; } // ok, NULL is visible here
  27 #pragma clang module end