code.delx.au - gnu-emacs/blob - test/manual/etags/c-src/dostorture.c

   1 /* Date: Thu, 05 Aug 1993 20:28:03 +0200
   2    From: "Tom R.Hageman" <tom@basil.icce.rug.nl>
   3    Subject: more etags torture;-) [etags 7.3 patch#3]
   4    To: pot@CNUCE.CNR.IT
   5
   6    Hi,
   7
   8    This test file illustrates some more problems with etags (7.3):
   9
  10
  11    1. parentheses are confusing,
  12    2. preprocessor directives can disrupt other state machines. */
  13
  14 /* A small torture test for etags. */
  15
  16 /* The classic parenthesis nightmare, based on signal(). */
  17 void
  18 (*tag1 (sig, handler)) ()
  19   int sig;
  20   void (*handler) ();
  21 {
  22   (*handler)(sig);
  23   return handler;
  24 }
  25
  26 #define notag2 void
  27 /* The classic, with user-defined return type. */
  28 notag2
  29 (*tag2 (sig, handler)) ()
  30   int sig;
  31   void (*handler) ();
  32 {
  33   (*handler)(sig);
  34   return handler;
  35 }
  36
  37 /* The classic, in ANSI C style. */
  38 void
  39 (*tag3 (int sig, void (*handler) (int))) (int)
  40 {
  41   (*handler)(sig);
  42   return handler;
  43 }
  44
  45 #define notag4 void
  46 /* The classic, with user-defined return type, in ANSI C style. */
  47 notag4
  48 (*tag4 (int sig, void (*handler) (int))) (int)
  49 {
  50   (*handler)(sig);
  51   return handler;
  52 }
  53
  54
  55 /* A less tortuous example. */
  56 void
  57 tag5 (handler, arg)
  58 void (*handler)();
  59 void *arg;
  60 {
  61   (*handler)(arg);
  62 }
  63
  64 /* A less tortuous example, in ANSI C style. */
  65 void
  66 tag6 (void (*handler) (void *), void *arg)
  67 {
  68   (*handler)(arg);
  69 }
  70
  71
  72 /* Interfering preprocessing torture */
  73
  74 int pp1(
  75 #if (__STDC__)
  76         int
  77 #endif
  78         bar)
  79 #if (!__STDC__)
  80      int bar;
  81 #endif
  82 {
  83   return bar;
  84 }
  85
  86 int
  87 pp2
  88 #if __STDC__
  89   (int bar)
  90 #else
  91   (bar)
  92     int bar;
  93 #endif
  94 {
  95   return bar;
  96 }
  97
  98 int
  99 #if __STDC__
 100 pp3(int bar)
 101 #else
 102 pp3(bar)
 103   int bar;
 104 #endif
 105 {
 106   return bar;
 107 }