/* MiniJava Lexer Specification */

%%

%public
%class Lexer

%unicode

%standalone
%line
%column


%{
 
  /* JAVA code, such as global variable declarations, goes here */

%}

%eof{ 

  /* JAVA code on what to do when EOF is reached */

%eof} 


LineTerminator = \r|\n|\r\n
InputCharacter = [^\r\n]
WhiteSpace     = {LineTerminator} | [ \t\f]

EndOfLineComment     = "//" {InputCharacter}* {LineTerminator}

Identifier = [:jletter:] [:jletterdigit:]*

DecIntegerLiteral = 0 | [1-9][0-9]*

/* Make sure your state names are more descriptive ones than this one */
%state SOME_STATE

%%

<YYINITIAL>"sample_token"        { System.out.println("SAMPLE_TOKEN"); }


<YYINITIAL> {
  "another_token"                { System.out.println("ANOTHER_TOKEN"); }
  "token_with_semantic_value"	 { System.out.println("TOKEN_WITH_SEMANTIC_VALUE(" + yytext() + ")"); }

  /* comments */
  {EndOfLineComment}             { /* ignore */ }
  "/*"                           { yybegin(SOME_STATE); }
 
  /* whitespace */
  {WhiteSpace}                   { /* ignore */ }
}

<SOME_STATE> {
.                                { }
}

/* error fallback */
<YYINITIAL>.|\n                  { System.out.println("Error: Illegal character <" + yytext() + "> at line " + yyline + " column " + yycolumn ); 
                                   System.exit(1); }