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

This is the documentation for a snapshot of the develop branch, built from commit 486aa2e58e.
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Class new_allocator<void>

boost::container::new_allocator<void> — Specialization of new_allocator for void types.

Synopsis

// In header: <boost/container/new_allocator.hpp>


class new_allocator<void> {
public:
  // types
  typedef void                   value_type;                            
  typedef void *                 pointer;                               
  typedef const void *           const_pointer;                         
  typedef implementation_defined propagate_on_container_move_assignment;  // A integral constant of type bool with value true. 
  typedef implementation_defined is_always_equal;                         // A integral constant of type bool with value true. 

  // member classes/structs/unions
  
  struct rebind {
    // types
    typedef new_allocator< T2 > other;
  };

  // public member functions
  new_allocator() noexcept;
  new_allocator(const new_allocator &) noexcept;
  new_allocator & operator=(const new_allocator &) noexcept;
  template<typename T2> new_allocator(const new_allocator< T2 > &) noexcept;

  // friend functions
  void swap(new_allocator &, new_allocator &) noexcept;
  bool operator==(const new_allocator &, const new_allocator &) noexcept;
  bool operator!=(const new_allocator &, const new_allocator &) noexcept;
};

Description

new_allocator public member functions

  1. new_allocator() noexcept;

    Default constructor Never throws

  2. new_allocator(const new_allocator &) noexcept;

    Constructor from other new_allocator. Never throws

  3. new_allocator & operator=(const new_allocator &) noexcept;

    Copy assignment operator from other new_allocator. Never throws

  4. template<typename T2> new_allocator(const new_allocator< T2 > &) noexcept;

    Constructor from related new_allocator. Never throws

new_allocator friend functions

  1. void swap(new_allocator &, new_allocator &) noexcept;

    Swaps two allocators, does nothing because this new_allocator is stateless

  2. bool operator==(const new_allocator &, const new_allocator &) noexcept;

    An new_allocator always compares to true, as memory allocated with one instance can be deallocated by another instance

  3. bool operator!=(const new_allocator &, const new_allocator &) noexcept;

    An new_allocator always compares to false, as memory allocated with one instance can be deallocated by another instance


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