Info Catalog flex: How do I abandon a file in the middle of a scan and switch to a new file? flex: FAQ flex: How do I execute code at termination?

flex: How do I execute code only during initialization (only before the first scan)?

 
 How do I execute code only during initialization (only before the first scan)?
 ==============================================================================
 
 You can specify an initial action by defining the macro 'YY_USER_INIT'
 (though note that 'yyout' may not be available at the time this macro is
 executed).  Or you can add to the beginning of your rules section:
 
      %%
          /* Must be indented! */
          static int did_init = 0;
      
          if ( ! did_init ){
      do_my_init();
              did_init = 1;
          }
 

Info Catalog flex: How do I abandon a file in the middle of a scan and switch to a new file? flex: FAQ flex: How do I execute code at termination?