gcc/testsuite/gcc.dg/cpp/macro10.c

   1 /* Copyright (C) 2001 Free Software Foundation, Inc.  */
   2
   3 /* { dg-do preprocess } */
   4
   5 /* Source: Neil Booth, 23 Sep 2001.
   6
   7    A tricky, pathological corner case we used to get wrong.  Expansion
   8    should go as follows.  The asterisk indicates the token has "blue
   9    paint" can no longer be macro expanded.  We used to lose that
  10    information when parsing arguments and dropping to the lexer to get
  11    the ')'.
  12
  13    foo )
  14    bar foo* )
  15    func (foo* )
  16    foo*
  17
  18    If we try and expand the final foo, we get an "unterminated
  19    argument list invoking macro <func>" error.  If we do the right
  20    thing and leave it as is, no diagnostics are emitted.  */
  21
  22 #define func(x) x
  23 #define bar func(
  24 #define foo bar foo
  25 foo )