PPT Slide

<YYINITIAL> {

{Char} { yypushback(1);

yybegin(TITLE);

}

<TITLE> {

{Title} { return new Symbol(sym.TITLE, yytext()); }

{Slash} { yybegin(AUTHOR);

return new Symbol(sym.SLASH);

}

<<EOF>> { return new Symbol(sym.EOF); }

}

<AUTHOR> {

{Field} { return new Symbol(sym.AUTHOR, yytext()); }

{Slash} { yybegin(DATE);

return new Symbol(sym.SLASH);

}

<DATE> {

{Field} { return new Symbol(sym.DATE, yytext()); }

{Slash} { yybegin(ISBN);

return new Symbol(sym.SLASH);

}

<ISBN> {

{Field} { return new Symbol(sym.ISBN, yytext()); }

{Slash} { yybegin(PUBLISHER);

return new Symbol(sym.SLASH);

}

<PUBLISHER> {

{Field} { return new Symbol(sym.PUBLISHER, yytext()); }

{LineTerminator} { yybegin(TITLE);

return new Symbol(sym.EOL);

}

mylexer.flex

See example18