Subversion Repositories programming

/*******************************************************************************

 * File: robot.flex

 *

 * Copyright (c) 2006, Ira W. Snyder (devel@irasnyder.com)

 * License: GNU General Public License v2

 *

 * This file implements the scanner that reads the input for

 * the robot from Project #3, Question #2.

 ******************************************************************************/

%%

%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;

    }

%}

WSPACE = [\ \t]+

NL     = \n | \r | \r\n

IGNORE = [^ptPT\ \t\n\r]+

%%

"p"         { return Parser.PUT;        }

"P"         { return Parser.PUT;        }

"t"         { return Parser.TAKE;       }

"T"         { return Parser.TAKE;       }

{NL}        { return Parser.NL;         }

{WSPACE}    {                           }

{IGNORE}    {                           }