gcc/testsuite/gcc.dg/cpp/charconst.c

   1 /* Copyright (C) 2001 Free Software Foundation, Inc.  */
   2
   3 /* { dg-do compile } */
   4
   5 /* This tests various diagnostics about character constants, for both
   6    the preprocessor and the compiler.
   7
   8    Neil Booth, 22 May 2001.  */
   9
  10 #if ''                  /* { dg-warning "empty" "empty charconst" } */
  11 #endif
  12 #if L''                 /* { dg-warning "empty" "empty wide charconst" } */
  13 #endif
  14 #if 'very long'         /* { dg-warning "too long" "long charconst" } */
  15 #endif
  16 #if L'very long'        /* { dg-warning "too long" "long wide charconst" } */
  17 #endif
  18 /* Don't do this test for L'ab'; it depends upon sizeof (wchar_t).  */
  19 #if 'ab'                /* { dg-warning "multi-char" "multi-character" } */
  20 #endif
  21
  22 void foo ()
  23 {
  24   int c;
  25   __WCHAR_TYPE__ w;
  26
  27   c = '';               /* { dg-warning "empty" "empty charconst" } */
  28   w = L'';              /* { dg-warning "empty" "empty wide charconst" } */
  29
  30   c = 'very long';      /* { dg-warning "too long" "long charconst" } */
  31   w = L'very long';     /* { dg-warning "too long" "long wide charconst" } */
  32
  33   c = 'ab';             /* { dg-warning "multi-char" "multi-char" } */
  34   /* Wide charconsts cannot contain more than one wide character.  */
  35   w = L'ab';            /* { dg-warning "too long" "multi-char wide" } */
  36 }