Chapter 22. Boost.Move

Boost C++ Libraries

Chapter 22. Boost.Move

Ion Gaztanaga

Copyright © 2008-2024 Ion Gaztanaga

Distributed under the Boost Software License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

Table of Contents

Tested compilers

What is Boost.Move?

Introduction

Implementing copyable and movable classes

Copyable and movable classes in C++0x
Copyable and movable classes in portable syntax for both C++03 and C++0x compilers

Composition or inheritance

Movable but Non-Copyable Types

Containers and move semantics

Constructor Forwarding

Implicit Move when returning a local object

Move iterators

Move inserters

Move algorithms

Smart pointer unique_ptr

Basic use
Arrays
Creation functions
Custom deleters
Conversions
Containers of unique_ptr
constexpr support
Calling convention
Improvements over std::unique_ptr and other differences

Emulation limitations

Initializing base classes
Template parameters for perfect forwarding
Binding of rvalue references to lvalues
Assignment operator in classes derived from or holding copyable and movable types
Templated assignment operator in copyable and movable types

How the move emulation works in C++03

Thanks and credits

Release Notes

Header <boost/move/adl_move_swap.hpp>
Header <boost/move/algo/adaptive_merge.hpp>
Header <boost/move/algo/adaptive_sort.hpp>
Header <boost/move/algo/predicate.hpp>
Header <boost/move/algo/unique.hpp>
Header <boost/move/algorithm.hpp>
Header <boost/move/core.hpp>
Header <boost/move/default_delete.hpp>
Header <boost/move/iterator.hpp>
Header <boost/move/make_unique.hpp>
Header <boost/move/algo/move.hpp>
Header <boost/move/move.hpp>
Header <boost/move/traits.hpp>
Header <boost/move/unique_ptr.hpp>
Header <boost/move/utility.hpp>
Header <boost/move/utility_core.hpp>

	Important
	To be able to use containers of movable-only values in C++03 mode you will need to use containers supporting move semantics, like Boost.Container containers

Tested compilers

Boost.Move has been tested in the following compilers/platforms:

Visual C++ >= 7.1.
GCC >= 4.1.

	Warning
	GCC < 4.3 and MSVC < 9.0 are deprecated and will be removed in the next version.