1/* { dg-do preprocess } */
2
3/* Test source Robert Lipe, with minor modifications for the testsuite
4   by Neil Booth.  29 Oct 2000.  */
5
6#define _VA_ARGS_0() 42
7#define _L_0()                      (
8#define _R_0()                      )
9
10#define __VA_ARGLIST(argc,list) \
11                _VA_ARGS_##argc list
12
13#define _CAT_LIST(argc,list1,list2) \
14                _L_##argc list1 _R_##argc list2
15
16#define _VA_ARGLIST(argc,list1,list2) \
17                __VA_ARGLIST(argc, \
18                        _CAT_LIST(argc, list1, list2))
19
20#define BLAH(a) _VA_ARGLIST(a, (), ())
21
22#if BLAH (0) != 42
23#error Simulated varargs macros
24#endif
25