This property map applies the identity function, that is, it just returns a copy of the key object that was input.
boost/property_map.hpp
| Type | Description |
|---|---|
| boost::property_traits<identity_property_map>::value_type | This type is std::size_t; the map functions are templated. |
| boost::property_traits<identity_property_map>::key_type | This type is std::size_t; the map functions are templated. |
| boost::property_traits<identity_property_map>::category | This type is boost::readable_op_bracket_tag. |
| Member | Description |
|---|---|
| identity_property_map() | Default constructor. |
| identity_property_map(const identity_property_map& x) | Copy constructor. |
| template <class T> T operator[](T x) const |
Returns a copy of object x. |
| Member | Description |
|---|---|
| template <class T> T get(const identity_property_map& pmap, T x) |
Returns a copy of object x. |
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