import java_cup.runtime.SymbolFactory;
import java_cup.runtime.ComplexSymbolFactory;

%%

%class DemoLexer
%public
%{
   private SymbolFactory sf = new ComplexSymbolFactory ();
   public DemoLexer (java.io.InputStream r, SymbolFactory sf)
   {
     this (r);
     this.sf = sf;
   }
%}
%eofval{
  return sf.newSymbol ("EOF", sym.EOF);
%eofval}

%unicode

%cup
%cupdebug

%char
%column
%line


ALPHA=[A-Za-z_]
DIGIT=[0-9]
NONNEWLINE_WHITE_SPACE_CHAR=[\ \t\b\012]
NEWLINE=\r|\n|\r\n
IDENT={ALPHA}({ALPHA}|{DIGIT}|_)*

%% 

<YYINITIAL> {
  "Dragon"
    { return sf.newSymbol ("Dragon", sym.DRAGON); }

  "Alice"|"Bob"
    { return sf.newSymbol ("AliceOrBob", sym.ALICEORBOB); }
  
  {DIGIT}{DIGIT}{DIGIT}{DIGIT}{DIGIT}
    { return sf.newSymbol ("FiveDigits", sym.FIVEDIGITS); }

  {DIGIT}{1,3}
    { return sf.newSymbol ("ShortDigits", sym.SHORTDIGITS); }

  {DIGIT}+
    { return sf.newSymbol ("Digits", sym.DIGITS); }

  "http://" ({IDENT} ".")* {IDENT}
    { return sf.newSymbol ("SimpleURL", sym.SIMPLEURL); }

  {NONNEWLINE_WHITE_SPACE_CHAR}+ { }

  {IDENT}
    { return sf.newSymbol ("Identifier", sym.IDENTIFIER, yytext ()); }
}

{NEWLINE} { }

. { System.out.println ("Illegal character: <" + yytext () + ">"); }