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

   1 /* Copyright (C) 2000 Free Software Foundation, Inc.  */
   2
   3 /* { dg-do preprocess } */
   4
   5 /* Tests behavior of the defined operator.  */
   6
   7 /*  Source: Neil Booth, 29 Oct 2000, Zack Weinberg 11 Dec 2000.  */
   8
   9 #define defined                 /* { dg-error "defined" } */
  10
  11 /* No diagnostics, though you could argue there should be.  */
  12 #if defined defined
  13 #error defined is defined!
  14 #endif
  15
  16 #define is_Z_defined defined Z
  17
  18 #if defined Z
  19 #error Z is not defined
  20 #endif
  21
  22 /* The behavior of "defined" when it comes from a macro expansion is
  23    now documented.  */
  24 #if is_Z_defined
  25 #error Macro expanding into defined operator test 1
  26 #endif
  27
  28 #define Z
  29
  30 #if !defined Z
  31 #error Z is defined
  32 #endif
  33
  34 #if !is_Z_defined
  35 #error Macro expanding into defined operator test 2
  36 #endif
  37
  38 #undef is_Z_defined
  39 #undef Z
  40
  41 /* Do all the tests over again with the () form of defined.  */
  42
  43 /* No diagnostics, though you could argue there should be.  */
  44 #if defined(defined)
  45 #error defined is defined!
  46 #endif
  47
  48 #define is_Z_defined defined ( Z )
  49
  50 #if defined(Z)
  51 #error Z is not defined
  52 #endif
  53
  54 /* The behavior of "defined" when it comes from a macro expansion is
  55    now documented.  */
  56 #if is_Z_defined
  57 #error Macro expanding into defined operator test 1
  58 #endif
  59
  60 #define Z
  61
  62 #if !defined(Z)
  63 #error Z is defined
  64 #endif
  65
  66 #if !is_Z_defined
  67 #error Macro expanding into defined operator test 2
  68 #endif
  69
  70 /* Use of defined in different contexts.  */
  71
  72 #define bad1 defined
  73 #if !bad1 Z                     /* { dg-warning "may not be portable" } */
  74 #error Z is defined
  75 #endif
  76
  77 #if !bad1 (Z)                   /* { dg-warning "may not be portable" } */
  78 #error Z is defined
  79 #endif
  80
  81 #define bad2 defined (Z
  82 #if !bad2)                      /* { dg-warning "may not be portable" } */
  83 #error Z is defined
  84 #endif
  85