flex-2.5.33/examples/fastwc/wc5.l

   1 /* Oops; slight change from wc3.l introduces backtracking */
   2
   3 ws    [ \t]
   4 nonws [^ \t\n]
   5 word  {ws}*{nonws}+
   6 words {word}{ws}+
   7
   8 %option main noyywrap
   9 %%
  10         int cc = 0, wc = 0, lc = 0;
  11
  12 {word}{ws}*             cc += yyleng; ++wc;
  13 {word}{ws}*\n           cc += yyleng; ++wc; ++lc;
  14 {words}{word}           cc += yyleng; wc += 2;  /* oops */
  15 {words}{2}{word}{ws}*   cc += yyleng; wc += 3;
  16 {words}{3}{word}{ws}*   cc += yyleng; wc += 4;
  17
  18 {ws}+                   cc += yyleng;
  19
  20 \n+                     cc += yyleng; lc += yyleng;
  21
  22 <<EOF>>         {
  23                 printf( "%8d %8d %8d\n", lc, wc, cc );
  24                 yyterminate();
  25                 }