1 /* { dg-do preprocess } */ 2 /* { dg-options "-std=gnu99" } */ 3 4 /* Jamie's varargs macros from hell. Not for the faint of heart. 5 Great tests that C99 and GNU varargs give identical results. 6 Adapted to the testsuite by Neil Booth, 1 Nov 2000. */ 7 8 /* Permission is granted to use, copy, modify and distribute this file 9 freely for any purpose whatsoever. This file is free software, and 10 there's no warranty. 11 12 -- Jamie Lokier <jamie.lokier@cern.ch>, 25/Sep/2000. */ 13 14 #define dup3(x) x,x,x 15 16 /* Count elements in a list (0 to 10 max). */ 17 #define gnu_count(y...) _gnu_count1 ( , ##y) 18 #define _gnu_count1(y...) _gnu_count2 (y,10,9,8,7,6,5,4,3,2,1,0) 19 #define _gnu_count2(_,x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,n,ys...) n 20 21 /* Tail of a list. */ 22 #define gnu_tail(y...) _gnu_tail (y) 23 #define _gnu_tail(x,y...) y 24 25 /* Repeat N times. */ 26 #define gnu_repeat(n, x) gnu_tail (_gnu_repeat (n, x)) 27 #define _gnu_repeat(n, x) _gnu_repeat_##n (x) 28 #define _gnu_repeat_0(x) 29 #define _gnu_repeat_1(x) ,x 30 #define _gnu_repeat_2(x) ,x,x 31 #define _gnu_repeat_3(x) ,x,x,x 32 #define _gnu_repeat_4(x) ,x,x,x,x 33 #define _gnu_repeat_5(x) ,x,x,x,x,x 34 35 #define _gnu_keep(xs...) xs 36 #define _gnu_discard(xs...) 37 #define _gnu_split_r(n,xs...) _gnu_split_rd (n,_gnu_keep,_gnu_discard xs) 38 #define _gnu_split_d(n,xs...) _gnu_split_rd (n,_gnu_discard,_gnu_keep xs) 39 #define _gnu_split_rd(n,xs...) _gnu_split_##n (xs) 40 #define _gnu_split_0(a,b,xs...) a() b(xs) 41 #define _gnu_split_1(a,b,x0,xs...) a(x0) b(xs) 42 #define _gnu_split_2(a,b,x0,x1,xs...) a(x0,x1) b(xs) 43 #define _gnu_split_3(a,b,x0,x1,x2,xs...) a(x0,x1,x2) b(xs) 44 #define _gnu_split_4(a,b,x0,x1,x2,x3,xs...) a(x0,x1,x2,x3) b(xs) 45 #define _gnu_split_5(a,b,x0,x1,x2,x3,x4,xs...) a(x0,x1,x2,x3,x4) b(xs) 46 47 /* List manipulations. Surprise: index zero is the rightmost element. */ 48 #define gnu_take(n, xs...) \ 49 _gnu_split_d (_gnu_count1 ( , ## xs), _gnu_repeat (n, _gnu_error) , ## xs) 50 #define gnu_drop(n, xs...) \ 51 _gnu_split_d (n,,_gnu_split_r (_gnu_count1 ( , ## xs), _gnu_repeat (n, _gnu_error) , ## xs)) 52 #define gnu_index(pos, xs...) gnu_take (1, gnu_drop (pos , ## xs)) 53 54 /* C99 __VA_ARGS__ versions */ 55 #define c99_count(...) _c99_count1 ( , ##__VA_ARGS__)/* If only ## worked.*/ 56 #define _c99_count1(...) _c99_count2 (__VA_ARGS__,10,9,8,7,6,5,4,3,2,1,0) 57 #define _c99_count2(_,x0,x1,x2,x3,x4,x5,x6,x7,x8,x9,n,...) n 58 59 #define c99_tail(...) _c99_tail (__VA_ARGS__) 60 #define _c99_tail(x,...) __VA_ARGS__ 61 62 /* Repeat N times. */ 63 #define c99_repeat(n, x) c99_tail (_c99_repeat (n, x)) 64 #define _c99_repeat(n, x) _c99_repeat_##n (x) 65 #define _c99_repeat_0(x) 66 #define _c99_repeat_1(x) ,x 67 #define _c99_repeat_2(x) ,x,x 68 #define _c99_repeat_3(x) ,x,x,x 69 #define _c99_repeat_4(x) ,x,x,x,x 70 #define _c99_repeat_5(x) ,x,x,x,x,x 71 72 #define _c99_keep(...) __VA_ARGS__ 73 #define _c99_discard(...) 74 #define _c99_split_r(n,...) _c99_split_rd(n,_c99_keep,_c99_discard __VA_ARGS__) 75 #define _c99_split_d(n,...) _c99_split_rd(n,_c99_discard,_c99_keep __VA_ARGS__) 76 #define _c99_split_rd(n,...) _c99_split_##n (__VA_ARGS__) 77 #define _c99_split_0(a,b,...) a() b(__VA_ARGS__) 78 #define _c99_split_1(a,b,x0,...) a(x0) b(__VA_ARGS__) 79 #define _c99_split_2(a,b,x0,x1,...) a(x0,x1) b(__VA_ARGS__) 80 #define _c99_split_3(a,b,x0,x1,x2,...) a(x0,x1,x2) b(__VA_ARGS__) 81 #define _c99_split_4(a,b,x0,x1,x2,x3,...) a(x0,x1,x2,x3) b(__VA_ARGS__) 82 #define _c99_split_5(a,b,x0,x1,x2,x3,x4,...) a(x0,x1,x2,x3,x4) b(__VA_ARGS__) 83 84 /* List manipulations. Surprise: index zero is the rightmost element. */ 85 #define c99_take(n, ...) \ 86 _c99_split_d (_c99_count1 ( , ## __VA_ARGS__), _c99_repeat (n, _c99_error) , ## __VA_ARGS__) 87 #define c99_drop(n, ...) \ 88 _c99_split_d (n,,_c99_split_r (_c99_count1 ( , ## __VA_ARGS__), _c99_repeat (n, _c99_error) , ## __VA_ARGS__)) 89 #define c99_index(pos, ...) c99_take (1, c99_drop (pos , ## __VA_ARGS__)) 90 91 /************** Expansions **************/ 92 93 /* Correct answers are 0, 0, 1, 2, 10. */ 94 #if _gnu_count1 () != 0 || gnu_count () != 0 || gnu_count (A) != 1 \ 95 || gnu_count (,) != 2 || gnu_count (A, B, C, D, E, F, G, H, I, J) != 10 96 #error gnu_count 97 #endif 98 99 /* Correct answers are empty, 'x'. */ 100 #if gnu_repeat (0, 'x') gnu_repeat (1, 'x') != 'x' 101 #error gnu_repeat 102 #endif 103 104 /* Correct answers are "e", "b", "a", empty. */ 105 #if gnu_index (0, 'a', 'b', 'c', 'd', 'e') != 'e' \ 106 || gnu_index (3, 'a', 'b', 'c', 'd', 'e') != 'b' \ 107 || gnu_index (4, 'a', 'b', 'c', 'd', 'e') != 'a' \ 108 gnu_index (5, 'a', 'b', 'c', 'd', 'e') 109 #error gnu_index 110 #endif 111 112 /************* C99 tests *************/ 113 114 /* The answers are 0, 0, 1, 2, 10 as for the non-C99 version. */ 115 #if _c99_count1 () != 0 || c99_count () != 0 || c99_count (A) != 1 \ 116 || c99_count (,) != 2 || c99_count (A, B, C, D, E, F, G, H, I, J) != 10 117 #error c99_count 118 #endif 119 120 /* Correct answers are empty, 'x'. */ 121 #if c99_repeat (0, 'x') c99_repeat (1, 'x') != 'x' 122 #error c99_repeat 123 #endif 124 125 /* Correct answers are "e", "b", "a", empty. */ 126 #if c99_index (0, 'a', 'b', 'c', 'd', 'e') != 'e' \ 127 || c99_index (3, 'a', 'b', 'c', 'd', 'e') != 'b' \ 128 || c99_index (4, 'a', 'b', 'c', 'd', 'e') != 'a' \ 129 c99_index (5, 'a', 'b', 'c', 'd', 'e') 130 #error gnu_index 131 #endif 132