1 // Example from C99 6.10.3.4p6
2 
3 // RUN: %clang_cc1 -E %s | FileCheck -strict-whitespace %s
4 
5 #define str(s) # s
6 #define xstr(s) str(s)
7 #define debug(s, t) printf("x" # s "= %d, x" # t "= s" \
8                            x ## s, x ## t)
9 #define INCFILE(n) vers ## n
10 #define glue(a, b) a ## b
11 #define xglue(a, b) glue(a, b)
12 #define HIGHLOW "hello"
13 #define LOW LOW ", world"
14 debug(1, 2);
15 fputs(str(strncmp("abc\0d" "abc", '\4') // this goes away
16           == 0) str(: @\n), s);
17 include xstr(INCFILE(2).h)
18 glue(HIGH, LOW);
19 xglue(HIGH, LOW)
20 
21 
22 // CHECK: printf("x" "1" "= %d, x" "2" "= s" x1, x2);
23 // CHECK: fputs("strncmp(\"abc\\0d\" \"abc\", '\\4') == 0" ": @\n", s);
24 // CHECK: include "vers2.h"
25 // CHECK: "hello";
26 // CHECK: "hello" ", world"
27 
28