Class function_base
boost::function_base — The common base class for all Boost.Function
objects. Objects of type function_base may not be created
directly.
Synopsis
class function_base {
public:
// capacity
bool empty() const;
// target access
template<typename Functor> Functor* target();
template<typename Functor> const Functor* target() const;
template<typename Functor> bool contains(const Functor&) const;
const std::type_info& target_type() const;
};
Description
function_base capacity
-
bool empty() const;
|
Returns: |
false if this has a target, and true otherwise. |
|
Throws: |
Will not throw. |
function_base target access
-
template<typename Functor> Functor* target();
template<typename Functor> const Functor* target() const;
|
Returns: |
If this stores a target of type
Functor, returns the address of the
target. Otherwise, returns the NULL
pointer. |
|
Throws: |
Will not throw. |
-
template<typename Functor> bool contains(const Functor& f) const;
|
Returns: |
true if this->target<Functor>() is non-NULL and function_equal(*(this->target<Functor>()), f)
|
-
const std::type_info& target_type() const;
|
Returns: |
typeid of the target function object, or typeid(void) if this->empty(). |
|
Throws: |
Will not throw. |
