flex-2.5.33/examples/fastwc/wc4.l

   1 /* Fastest version of wc: add rules to pick up newlines, too */
   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}*             ++wc; cc += yyleng;
  13 {word}{ws}*\n           ++wc; cc += yyleng; ++lc;
  14 {words}{word}{ws}*      wc += 2; cc += yyleng;
  15 {words}{word}{ws}*\n    wc += 2; cc += yyleng; ++lc;
  16 {words}{2}{word}{ws}*   wc += 3; cc += yyleng;
  17 {words}{2}{word}{ws}*\n wc += 3; cc += yyleng; ++lc;
  18 {words}{3}{word}{ws}*   wc += 4; cc += yyleng;
  19 {words}{3}{word}{ws}*\n wc += 4; cc += yyleng; ++lc;
  20
  21 {ws}+                   cc += yyleng;
  22
  23 \n+                     cc += yyleng; lc += yyleng;
  24
  25 <<EOF>>         {
  26                 printf( "%8d %8d %8d\n", lc, wc, cc );
  27                 yyterminate();
  28                 }