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 an older version of Boost and was released in 2013. The current version is 1.89.0.

Class template unordered_map_index

Class template unordered_map_index

boost::interprocess::unordered_map_index

Synopsis

// In header: <boost/interprocess/indexes/unordered_map_index.hpp>

template<typename MapConfig> 
class unordered_map_index {
public:
  // construct/copy/destruct
  unordered_map_index(segment_manager_base *);

  // public member functions
  void reserve(std::size_t) ;
  void shrink_to_fit() ;
};

Description

Index type based in unordered_map. Just derives from unordered_map and defines the interface needed by managed memory segments

`unordered_map_index` public construct/copy/destruct

```
unordered_map_index(segment_manager_base * segment_mngr);
```
Constructor. Takes a pointer to the segment manager. Can throw

`unordered_map_index` public member functions

```
void reserve(std::size_t n) ;
```
This reserves memory to optimize the insertion of n elements in the index
```
void shrink_to_fit() ;
```
This tries to free previously allocate unused memory.