// RUN: %clang_cc1 -E %s -fno-caret-diagnostics 2>&1 >/dev/null | grep 'file successfully included' | count 3// XX expands to nothing.#define XX// expand macros to get to file to include#define FILE"file_to_include.h"#include XX FILE#include FILE// normal include#include"file_to_include.h"