Subversion Repositories programming

%%

%byaccj

%{

    /* store a reference to the parser object */

    private parser yyparser;

    /* constructor taking an additional parser object */

    public Yylex(java.io.Reader r, parser yyparser) {

        this(r);

        this.yyparser = yyparser;

    }

%}

ID = [a-zA-Z_]([a-zA-Z_] | [0-9])*

ADDOP = "+" | "-"

MULOP = "*" | "/"

NUM = [0-9]+ ("." [0-9]+)?

WSPACE = [\ \t]+ | \n | \r | \r\n

%%

"class"     { return parser.CLASS;      }

"public"    { return parser.PUBLIC;     }

"private"   { return parser.PRIVATE;    }

"int"       { return parser.INT;        }

"float"     { return parser.FLOAT;      }

"void"      { return parser.VOID;       }

"if"        { return parser.IF;         }

"else"      { return parser.ELSE;       }

"while"     { return parser.WHILE;      }

"return"    { return parser.RETURN;     }

"("         { return parser.LPAREN;     }

")"         { return parser.RPAREN;     }

"{"         { return parser.LBRACE;     }

"}"         { return parser.RBRACE;     }

";"         { return parser.SEMI;       }

"="         { return parser.ASSIGNOP;   }

{ID}        { return parser.ID;         }

{ADDOP}     { return parser.ADDOP;      }

{MULOP}     { return parser.MULOP;      }

{NUM}       { return parser.NUM;        }

{WSPACE}    {                           }