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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 unary minus expressions.
*/
class Tuminus extends Texp implements AST {
Texp exp; // the negated expression
public Tuminus(Texp e) {
exp=e;
}
public String toString() {
return "-"+exp;
}
public void checkcontext(SymTab st) {
exp.checkcontext(st);
}
public void prepInterp(SymTab st) {
exp.prepInterp(st);
}
public int interpret(int[] in, int[] par) {
return -(exp.interpret(in,par));
}
}
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