Class template sum

Class template sum

boost::mixin::combinators::sum

Synopsis

// In header: <boost/mixin/combinators.hpp>

template<typename MessageReturnType> 
class sum {
public:
  // types
  typedef MessageReturnType result_type;

  // construct/copy/destruct
  sum();

  // public member functions
  bool add_result(const MessageReturnType &);
  const result_type & result() const;
  void reset();
};

Description

A combinator for a sum operation. Sums all the return values of the multicast chain.

Template Parameters

```
typename MessageReturnType
```
The actual return type of the messages.

`sum` public construct/copy/destruct

```
sum();
```

`sum` public member functions

```
bool add_result(const MessageReturnType & r);
```
The function used by the code generated for multicast messages.
```
const result_type & result() const;
```
The result of the operation if the multicast call has been made with an input/output parameter - an instance of sum
```
void reset();
```
Resets the result, so the instance could be reused.