...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Get a reference to the lowest layer.
lowest_layer_type & lowest_layer();
This function returns a reference to the lowest layer in a stack of stream layers.
A reference to the lowest layer in the stack of stream layers. Ownership is not transferred to the caller.