C++ (Cpp) ExpressionListPtr::getNthExpr Examples

Example #1

File: expression.cpp Project: HilayPatel/hhvm

ExpressionPtr Expression::unneededHelper() {
  ExpressionListPtr elist = ExpressionListPtr
    (new ExpressionList(getScope(), getRange(),
                        ExpressionList::ListKindWrapped));

  bool change = false;
  for (int i=0, n = getKidCount(); i < n; i++) {
    ExpressionPtr kid = getNthExpr(i);
    if (kid && kid->getContainedEffects()) {
      ExpressionPtr rep = kid->unneeded();
      if (rep != kid) change = true;
      if (rep->is(Expression::KindOfExpressionList)) {
        for (int j=0, m = rep->getKidCount(); j < m; j++) {
          elist->addElement(rep->getNthExpr(j));
        }
      } else {
        elist->addElement(rep);
      }
    }
  }

  if (change) {
    getScope()->addUpdates(BlockScope::UseKindCaller);
  }

  int n = elist->getCount();
  assert(n);
  if (n == 1) {
    return elist->getNthExpr(0);
  } else {
    return elist;
  }
}