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/*************************************************************** 
File: FLAG.CPP                Copyright 1992 by Dlugosz Software 
part of the CMDL package for command-line parsing 
cmdl_flag class 
This version may be used freely, with attribution. 
***************************************************************/ 
 
#include "usual.h" 
#include "cmdl.h" 
#include "scanner.h" 
 
/* /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ */ 
 
bool cmdl_flag::scan (cmdlscan& s) 
{ 
if (!prelude()) return FALSE; 
switch (s.thischar()) { 
   case '+': 
      ++s; 
      value= TRUE; 
      return TRUE; 
   case '-': 
      ++s; 
      value= FALSE; 
      return TRUE; 
   case '=': 
      error= NoValue; 
      return FALSE; 
   default: 
      value= TRUE; 
      return TRUE; 
   } 
} 
 
/* /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ */ 
 
void cmdl_flag::report_error() 
{ 
switch (error) { 
   case NoValue: 
      foutput ("use:\n@ or @+ will turn on.\n@- will turn off.\n"); 
      break; 
   default: 
      cmdl::report_error(); 
   } 
}