flex-2.5.33/examples/manual/front.lex

   1 %{
   2 #include <stdio.h>
   3 #include <string.h>
   4 #include "y.tab.h"                 /* this comes from bison        */
   5
   6 #define TRUE  1
   7 #define FALSE 0
   8
   9 #define copy_and_return(token_type) { strcpy(yylval.name,yytext); \
  10                                       return(token_type); }
  11
  12 int             yylexlinenum = 0;  /* so we can count lines        */
  13 %}
  14
  15 %%
  16                             /* Lexical scanning rules begin from here.  */
  17
  18 MEN|WOMEN|STOCKS|TREES      copy_and_return(NOUN)
  19 MISTAKES|GNUS|EMPLOYEES     copy_and_return(NOUN)
  20 LOSERS|USERS|CARS|WINDOWS   copy_and_return(NOUN)
  21
  22 DATABASE|NETWORK|FSF|GNU    copy_and_return(PROPER_NOUN)
  23 COMPANY|HOUSE|OFFICE|LPF    copy_and_return(PROPER_NOUN)
  24
  25 THE|THIS|THAT|THOSE         copy_and_return(DECLARATIVE)
  26
  27 ALL|FIRST|LAST              copy_and_return(CONDITIONAL)
  28
  29 FIND|SEARCH|SORT|ERASE|KILL copy_and_return(VERB)
  30 ADD|REMOVE|DELETE|PRINT     copy_and_return(VERB)
  31
  32 QUICKLY|SLOWLY|CAREFULLY    copy_and_return(ADVERB)
  33
  34 IN|AT|ON|AROUND|INSIDE|ON   copy_and_return(POSITIONAL)
  35
  36 "."                         return(PERIOD);
  37 "\n"                        yylexlinenum++; return(NEWLINE);
  38 .
  39 %%
  40