Class function_baseboost::function_base — The common base class for all Boost.Function objects. Objects of type function_base may not be created directly. Synopsisclass 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
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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)
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const std::type_info& target_type() const;
Returns: |
typeid of the target function object, or typeid(void) if this->empty() . |
Throws: |
Will not throw. |