external/bsd/flex/dist/examples/manual/yymore.lex

   1 /*
   2  * yymore.lex: An example of using yymore()
   3  *             to good effect.
   4  */
   5
   6 %{
   7 #include <memory.h>
   8
   9 void yyerror(char *message)
  10 {
  11   printf("Error: %s\n",message);
  12 }
  13
  14 %}
  15
  16 %x STRING
  17
  18 %%
  19 \"   BEGIN(STRING);
  20
  21 <STRING>[^\\\n"]*  yymore();
  22 <STRING><<EOF>>    yyerror("EOF in string.");       BEGIN(INITIAL);
  23 <STRING>\n         yyerror("Unterminated string."); BEGIN(INITIAL);
  24 <STRING>\\\n       yymore();
  25 <STRING>\"        {
  26                      yytext[yyleng-1] = '\0';
  27                      printf("string = \"%s\"",yytext); BEGIN(INITIAL);
  28                   }
  29 %%