1 /*
   2  *      '\\' has a special meaning on phase 2 if and only if it is immediately
   3  * followed by '\n'.  In any other position it's left alone as any other
   4  * character.
   5  *
   6  * [5.1.1.2(1.2)]:
   7  *   Each instance of a backslash character (\) immediately followed by
   8  *   a new-line character is deleted, splicing physical source lines to
   9  *   form logical source lines.  Only the last backslash on any physical
  10  *   source line shall be eligible for being part of such a splice.
  11  *   A source file that is not empty shall end in a new-line character,
  12  *   which shall not be immediately preceded by a backslash character
  13  *   before any such splicing takes place.
  14  *
  15  * Note that this happens on the phase 2, before we even think of any
  16  * tokens.  In other words, splicing is ignorant of and transparent for
  17  * the rest of tokenizer.
  18  */
  19 
  20 #define A(x) #x
  21 #define B(x) A(x)
  22 /* This should result in "\a" */
  23 /* XXX: currently sparse produces "a" */
  24 /* Partially fixed: now it gives "\\a", which is a separate problem */
  25 B(\a)
  26 
  27 #define C\
  28  1
  29 /* This should give 1 */
  30 C
  31 
  32 #define D\
  33 1
  34 /* And this should give D, since '\n' is removed and we get no whitespace */
  35 /* XXX: currently sparse produces 1 */
  36 /* Fixed */
  37 D
  38 
  39 #define E '\\
  40 a'
  41 /* This should give '\a' - with no warnings issued */
  42 /* XXX: currently sparse complains a lot and ends up producing a */
  43 /* Fixed */
  44 E
  45 
  46 /* This should give nothing */
  47 /* XXX: currently sparse produces more junk */
  48 /* Fixed */
  49 // junk \
  50 more junk
  51 
  52 /* This should also give nothing */
  53 /* XXX: currently sparse produces / * comment * / */
  54 /* Fixed */
  55 /\
  56 * comment *\
  57 /
  58 
  59 /* And this should complain since final newline should not be eaten by '\\' */
  60 /* XXX: currently sparse does not notice */
  61 /* Fixed */
  62 \