Libosmium  2.22.0
Fast and flexible C++ library for working with OpenStreetMap data
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osmium::index Namespace Reference

Indexing of OSM data, Locations, etc. More...

Namespaces

namespace  map
 Key-value containers with unique integer values for a key.
namespace  multimap
 Key-value containers with multiple values for an integer key.

Classes

class  IdSet
class  IdSetDense
class  IdSetDenseIterator
class  IdSetSmall
class  MapFactory
class  RelationsMapIndex
class  RelationsMapIndexes
class  RelationsMapStash

Functions

template<typename T>
constexpr T empty_value ()
template<>
constexpr size_t empty_value< size_t > ()
template<typename TId, typename TValue, template< typename, typename > class TMap>
bool register_map (const std::string &name)

Detailed Description

Indexing of OSM data, Locations, etc.

Function Documentation

◆ empty_value()

template<typename T>
T osmium::index::empty_value ( )
constexpr

Some of the index classes need an "empty" value that can never appear in real data. This function must return this empty value for any class used as a value in an index. The default implementation returns a default constructed object, but it can be specialized.

◆ empty_value< size_t >()

template<>
size_t osmium::index::empty_value< size_t > ( )
constexpr

The size_t value in indexes is usually used for offsets into a buffer or file. It is unlikely that we ever need the full range, so the max value is a good "empty" value.

◆ register_map()

template<typename TId, typename TValue, template< typename, typename > class TMap>
bool osmium::index::register_map ( const std::string & name)
inline