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]+
PUT     = [pP]
TAKE    = [tT]

%%

{PUT}       { return Parser.PUT;        }
{TAKE}      { return Parser.TAKE;       }
{NL}        { return Parser.NL;         }
{WSPACE}    {                           }
{IGNORE}    {                           }