clang/test/Preprocessor/traditional-cpp.c

   1 /* Clang supports a very limited subset of -traditional-cpp, basically we only
   2  * intend to add support for things that people actually rely on when doing
   3  * things like using /usr/bin/cpp to preprocess non-source files. */
   4
   5 /*
   6  RUN: %clang_cc1 -traditional-cpp %s -E | FileCheck -strict-whitespace %s
   7  RUN: %clang_cc1 -traditional-cpp %s -E -C | FileCheck -check-prefix=CHECK-COMMENTS %s
   8  RUN: %clang_cc1 -traditional-cpp -x c++ %s -E | FileCheck -check-prefix=CHECK-CXX %s
   9 */
  10
  11 /* -traditional-cpp should eliminate all C89 comments. */
  12 /* CHECK-NOT: /*
  13  * CHECK-COMMENTS: {{^}}/* -traditional-cpp should eliminate all C89 comments. *{{/$}}
  14  */
  15
  16 /* -traditional-cpp should only eliminate "//" comments in C++ mode. */
  17 /* CHECK: {{^}}foo // bar{{$}}
  18  * CHECK-CXX: {{^}}foo {{$}}
  19  */
  20 foo // bar
  21
  22
  23 /* The lines in this file contain hard tab characters and trailing whitespace;
  24  * do not change them! */
  25
  26 /* CHECK: {{^}} indented!{{$}}
  27  * CHECK: {{^}}tab      separated       values{{$}}
  28  */
  29         indented!
  30 tab     separated       values
  31
  32 #define bracket(x) >>>x<<<
  33 bracket(|  spaces  |)
  34 /* CHECK: {{^}}>>>|  spaces  |<<<{{$}}
  35  */
  36
  37 /* This is still a preprocessing directive. */
  38 # define foo bar
  39 foo!
  40 -
  41         foo!    foo!
  42 /* CHECK: {{^}}bar!{{$}}
  43  * CHECK: {{^}} bar!    bar!    {{$}}
  44  */
  45
  46 /* Deliberately check a leading newline with spaces on that line. */
  47
  48 # define foo bar
  49 foo!
  50 -
  51         foo!    foo!
  52 /* CHECK: {{^}}bar!{{$}}
  53  * CHECK: {{^}} bar!    bar!    {{$}}
  54  */
  55
  56 /* FIXME: -traditional-cpp should not consider this a preprocessing directive
  57  * because the # isn't in the first column.
  58  */
  59  #define foo2 bar
  60 foo2!
  61 /* If this were working, both of these checks would be on.
  62  * CHECK-NOT: {{^}} #define foo2 bar{{$}}
  63  * CHECK-NOT: {{^}}foo2!{{$}}
  64  */
  65
  66 /* FIXME: -traditional-cpp should not homogenize whitespace in macros.
  67  */
  68 #define bracket2(x) >>>  x  <<<
  69 bracket2(spaces)
  70 /* If this were working, this check would be on.
  71  * CHECK-NOT: {{^}}>>>  spaces  <<<{{$}}
  72  */
  73
  74
  75 /* Check that #if 0 blocks work as expected */
  76 #if 0
  77 #error "this is not an error"
  78
  79 #if 1
  80 a b c in skipped block
  81 #endif
  82
  83 /* Comments are whitespace too */
  84
  85 #endif
  86 /* CHECK-NOT: {{^}}a b c in skipped block{{$}}
  87  * CHECK-NOT: {{^}}/* Comments are whitespace too
  88  */
  89
  90 Preserve URLs: http://clang.llvm.org
  91 /* CHECK: {{^}}Preserve URLs: http://clang.llvm.org{{$}}
  92  */
  93
  94 /* The following tests ensure we ignore # and ## in macro bodies */
  95
  96 #define FOO_NO_STRINGIFY(a) test(# a)
  97 FOO_NO_STRINGIFY(foobar)
  98 /* CHECK: {{^}}test(# foobar){{$}}
  99  */
 100
 101 #define FOO_NO_PASTE(a, b) test(b##a)
 102 FOO_NO_PASTE(xxx,yyy)
 103 /* CHECK: {{^}}test(yyy##xxx){{$}}
 104  */
 105
 106 #define BAR_NO_STRINGIFY(a) test(#a)
 107 BAR_NO_STRINGIFY(foobar)
 108 /* CHECK: {{^}}test(#foobar){{$}}
 109  */