gcc/testsuite/gcc.dg/cpp/avoidpaste1.c

   1 /* Copyright (C) 2001, 2003 Free Software Foundation, Inc.  */
   2
   3 /* { dg-do preprocess } */
   4 /* { dg-options "-ansi" } */
   5
   6 /* This tests that we avoid accidental pasting only before and after
   7    macros and arguments, and not when the tokens are already pasted
   8    in the souce file (e.g. "::" in a C source file).
   9
  10    Neil Booth, 28 Jan 2001.  */
  11
  12 #define f(x) x
  13 #define g
  14 #define tricky 1.0e ## -1
  15
  16 /* This should preprocess as
  17
  18 :: : : : : :^: 1.0e- 1
  19 : : : .. . 0 0 .
  20
  21 It relies on the fact that even when preprocessing C we bother to separate
  22 the colons of C++'s :: operator.  If we confine this behavior to C++
  23 in future, this test needs to change.  */
  24
  25 :: :g: :f(): :f(^): tricky
  26 :f(:): .. .__INCLUDE_LEVEL__ __INCLUDE_LEVEL__. /* Check builtins, too.  */
  27
  28 /* { dg-final { scan-file avoidpaste1.i ":: : : : : :\\^: 1.0e- 1" } }
  29    { dg-final { scan-file avoidpaste1.i ": : : \\\.\\\. \\\. 0 0 \\\." } } */