/usr/share/doc/jflex/examples/interpreter/Texplist.java is in jflex 1.4.3+dfsg-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* 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 a list of expressions.
*
* The interpretation of a list of expressions stores the
* results of the expressions in an array that can be used
* as parameter list for function calls.
*/
class Texplist implements AST {
Texplist explist; // next list element (optional null)
Texp exp; // expression of this list node
public Texplist(Texplist p, Texp e) {
explist=p;
exp=e;
}
public Texplist(Texp e) {
explist=null;
exp=e;
}
public String toString() {
if (explist!=null)
return explist+","+exp;
else
return exp.toString();
}
public void checkcontext(SymTab st) {
if (explist!=null)
explist.checkcontext(st);
exp.checkcontext(st); // CoCo (DefFun,DefVar,Arity)
} // in expression
public int length() {
if (explist!=null)
return 1+explist.length();
else
return 1;
}
public void prepInterp(SymTab st) { // set pointers and indices
exp.prepInterp(st);
if (explist!=null) explist.prepInterp(st);
}
public void interpret(int[] in, int[] par, int[] res, int index) {
res[index] = exp.interpret(in,par);
if (explist!=null) explist.interpret(in,par,res,index+1);
}
}
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