root/test/manual/etags/c-src/torture.c

DEFINITIONS

1. tag3
2. tag5
3. tag6
4. pp1
5. pp3

     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 }