wrapper.hpp File Reference

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Description

Library implementation: smart-pointer variations, wrappers and managing holders.

This is (intended to become) a loose collection of the various small helper templates for wrapping, containing, placing or handling a somewhat problematic other object. Mostly these are implemented to suit a specific need and then factored out later on.

• ItemWrapper is a similar concept, but more like a smart-ptr. Moreover, it can be instantiated with a value type, a pointer or a reference type, yielding the same behaviour in all cases (useful for building templates)
• FunctionResult is the combination of ItemWrapper with a functor object to cache the function result value.

See also

lib::TransformIter

Todo:

2017 consider to split off the FunctionResult into a dedicated header to reduce includes

Definition in file wrapper.hpp.

#include "lib/error.hpp"
#include "lib/nocopy.hpp"
#include "lib/meta/function.hpp"
#include "lib/meta/function-closure.hpp"
#include "lib/meta/util.hpp"
#include "lib/util.hpp"
#include <functional>
#include <cstddef>

Classes
struct	FunctionResult< SIG >
	Extension of ItemWrapper: a function remembering the result of the last invocation. More...
class	ItemWrapper< TY >
	Universal value/ref wrapper accessible similar to a pointer. More...
class	ItemWrapper< TY & >
	Specialisation of the ItemWrapper to deal with references, as if they were pointer values. More...
class	ItemWrapper< void >
	Fallback-specialisation for ItemWrapper<void>. More...
class	ReturnRef< T >
	Reference wrapper implemented as constant function, returning the (fixed) reference on invocation. More...

Functions
template<typename TY >
bool	operator!= (ItemWrapper< TY > const &w1, ItemWrapper< TY > const &w2)
template<typename TY >
bool	operator== (ItemWrapper< TY > const &w1, ItemWrapper< TY > const &w2)
	allow equality comparison if the wrapped types are comparable
template<typename T >
ReturnRef< T >	refFunction (T &target)

Namespaces
	lib
	Implementation namespace for support and library code.