/usr/share/doc/jflex/examples/interpreter/Texp.java is in jflex 1.4.3-3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright (C) 2001 Gerwin Klein <lsf@jflex.de> *
* Copyright (C) 2001 Bernhard Rumpe <rumpe@in.tum.de> *
* All rights reserved. *
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License. See the file *
* COPYRIGHT for more information. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License along *
* with this program; if not, write to the Free Software Foundation, Inc., *
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA *
* *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/**
* AST node for an integer expression.
*
* The non terminal exp is the sum of multiple variants and
* therefore modeled as an abstract class.
*
* The interpretation function <tt>interpret</tt> is called with
* valuations of input variables <tt>in</tt> and parameters
* <tt>par</tt>. Before interpret can be called, pointers
* and variable indices must be set with <tt>prepInterp</tt>.
*/
abstract class Texp implements AST {
// test context conditions (DefFun,DefVar,Arity)
abstract public void checkcontext(SymTab st);
// set pointers and indices for variables and functions
abstract public void prepInterp(SymTab st);
// interpretation
abstract public int interpret(int[] in, int[] par);
}
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