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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* Copyright (C) 2001 Gerwin Klein <lsf@jflex.de> *
* Copyright (C) 2001 Bernhard Rumpe <rumpe@in.tum.de> *
* All rights reserved. *
* *
* License: BSD *
* *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/**
* AST node for an integer expression.
*
* The non terminal exp is the sum of multiple variants and
* therefore modelled 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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