/** Boucle for,  for ( Integer v =1 ; v<=n; v++) { e }. */
public class ExpFor extends Exp{ 
  public ExpVar v;
  public ExpEntier n;
  public Exp e;
  public ExpFor(ExpVar v, ExpEntier n, Exp e) {
    super(v, n, e); this.v = v; this.n = n; this.e = e;
  }
  public Integer eval(){
    for (int i = 1; i <= n.eval(); i++) {
      parser.symTab.put(v.name,i);
      e.eval();
    }
    return v.eval();
  }
  public void accept(AstVisitor v) { v.visit(this); }
}