C++ (Cpp) exprt::make_not示例

void guardt::guard_expr(exprt &dest) const
{
  if(is_true())
  {
    // do nothing
  }
  else
  {
    if(dest.is_false())
    {
      dest=as_expr();
      dest.make_not();
    }
    else
    {
      implies_exprt tmp;
      tmp.op0()=as_expr();
      tmp.op1().swap(dest);
      dest.swap(tmp);
    }
  }
}

示例#2

显示文件

文件： abstract_expression.cpp 项目： olivo/BP

void make_it_a_predicate(
  const predicatest &predicates,
  exprt &expr,
  const namespacet &ns)
{
  bool negation;
  canonicalize(expr, negation, ns);

  // see if we have it
  unsigned nr;
  if(predicates.find(expr, nr))
  {
    // yes, we do!

    // see if it is a constant
    if(predicates[nr].is_true())
      expr.make_true();
    else if(predicates[nr].is_false())
      expr.make_false();
    else
    {
      expr=exprt(ID_predicate_symbol, typet(ID_bool));
      expr.set(ID_identifier, nr);
    }

    if(negation)
      expr.make_not();
  }
  else
  {
    // nah, we don't
    // make it nondeterministic choice
    exprt tmp(ID_nondet_symbol, typet(ID_bool));
    tmp.add(ID_expression).swap(expr);
    expr.swap(tmp);
  }
}