...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
const_associative_property_map<UniquePairAssociativeContainer>
This property map is an adaptor that converts any type that is a model of both Pair Associative Container and Unique Associative Container such as std::map into a constant Lvalue Property Map. Note that the adaptor only retains a reference to the container, so the lifetime of the container must encompass the use of the adaptor.
#include <iostream> #include <map> #include <string> #include <boost/property_map/property_map.hpp> template <typename ConstAddressMap> void display(ConstAddressMap address) { typedef typename boost::property_traits<ConstAddressMap>::value_type value_type; typedef typename boost::property_traits<ConstAddressMap>::key_type key_type; key_type fred = "Fred"; key_type joe = "Joe"; value_type freds_address = get(address, fred); value_type joes_address = get(address, joe); std::cout << fred << ": " << freds_address << "\n" << joe << ": " << joes_address << "\n"; } int main() { std::map<std::string, std::string> name2address; boost::const_associative_property_map< std::map<std::string, std::string> > address_map(name2address); name2address.insert(make_pair(std::string("Fred"), std::string("710 West 13th Street"))); name2address.insert(make_pair(std::string("Joe"), std::string("710 West 13th Street"))); display(address_map); return EXIT_SUCCESS; }
boost/property_map/property_map.hpp
Parameter | Description | Default |
---|---|---|
UniquePairAssociativeContainer | Must be a model of both Pair Associative Container and Unique Associative Container . |
In addition to the methods and functions required by Lvalue Property Map, this class has the following members.
property_traits<const_associative_property_map>::value_typeThis is the same type as UniquePairAssociativeContainer::data_type.
const_associative_property_map()Default Constructor.
const_associative_property_map(const UniquePairAssociativeContainer& c)Constructor.
const data_type& operator[](const key_type& k) constThe operator bracket for property access. The key_type and data_type types are from the typedefs inside of UniquePairAssociativeContainer.
template <typename UniquePairAssociativeContainer> const_associative_property_map<UniquePairAssociativeContainer> make_assoc_property_map(const UniquePairAssociativeContainer& c);A function for conveniently creating an associative property map.
Copyright © 2002 |
Jeremy Siek,
Indiana University (jsiek@osl.iu.edu) Lie-Quan Lee, Indiana University (llee1@osl.iu.edu) Andrew Lumsdaine, Indiana University (lums@osl.iu.edu) |