Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. — Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

Class cast_source

boost::log::attributes::cast_source

Synopsis

// In header: <boost/log/attributes/attribute_cast.hpp>


class cast_source {
public:

  // public member functions
  explicit cast_source(attribute::impl *);
  template<typename T> T * as() const;
};

Description

The class holds a reference to the attribute factory implementation being casted

`cast_source` public member functions

```
explicit cast_source(attribute::impl * p);
```
Initializing constructor. Creates a source that refers to the specified factory implementation.
```
template<typename T> T * as() const;
```
The function attempts to cast the aggregated pointer to the implementation to the specified type.

Returns:

The converted pointer or NULL, if the conversion fails.