...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
After parsing input and generating an attribute value this value needs
to assigned to the attribute instance provided by the user. The customization
points assign_to_attribute_from_iterators
and assign_to_attribute_from_value
are utilized to adapt this assignment to the concrete type to be assigned.
This section describes both.