gcc/testsuite/gcc.dg/cpp/trad/defined.c

   1 /* Copyright (C) 2000 Free Software Foundation, Inc.  */
   2
   3 /* { dg-do preprocess } */
   4
   5 /* Tests tradcpp0 with defined.  The defined operator in traditional C
   6    works just the same as the defined operator in Standard C.  */
   7
   8 /* Source: Zack Weinberg, glibc, Neil Booth 11 Dec 2000.  */
   9
  10 #if defined REGPARMS
  11 #error REGPARMS should not be defined
  12 #endif
  13
  14 #define REGPARMS 1
  15 #if !defined REGPARMS
  16 #error REGPARMS should be defined
  17 #endif
  18
  19 #define defined                 /* { dg-error "defined" } */
  20
  21 /* No diagnostics, though you could argue there should be.  */
  22 #if defined defined
  23 #error defined is defined!
  24 #endif
  25
  26 #define is_Z_defined defined Z
  27
  28 #if defined Z
  29 #error Z is not defined
  30 #endif
  31
  32 /* The behavior of "defined" when it comes from a macro expansion is
  33    now documented.  */
  34 #if is_Z_defined
  35 #error Macro expanding into defined operator test 1
  36 #endif
  37
  38 #define Z
  39
  40 #if !defined Z
  41 #error Z is defined
  42 #endif
  43
  44 #if !is_Z_defined
  45 #error Macro expanding into defined operator test 2
  46 #endif
  47
  48 #undef is_Z_defined
  49 #undef Z
  50
  51 /* Do all the tests over again with the () form of defined.  */
  52
  53 /* No diagnostics, though you could argue there should be.  */
  54 #if defined(defined)
  55 #error defined is defined!
  56 #endif
  57
  58 #define is_Z_defined defined ( Z )
  59
  60 #if defined(Z)
  61 #error Z is not defined
  62 #endif
  63
  64 /* The behavior of "defined" when it comes from a macro expansion is
  65    now documented.  */
  66 #if is_Z_defined
  67 #error Macro expanding into defined operator test 1
  68 #endif
  69
  70 #define Z
  71
  72 #if !defined(Z)
  73 #error Z is defined
  74 #endif
  75
  76 #if !is_Z_defined
  77 #error Macro expanding into defined operator test 2
  78 #endif