The library is organized into layers of modules, with each module addressing a particular area of responsibility. A module may not depend on modules in higher layers.

The library is organized in three layers:

Layers

The entire library is found in the "boost/fusion" directory. Modules are organized in directories. Each module has its own header file placed in the same directory with the actual module-directory. For example, there exists "boost/fusion/support.hpp" in the same directory as "boost/fusion/support". Everything, except those found inside "detail" directories, is public. The library is header-only. There is no need to build object files to link against.

Directory

Example

If, for example, you want to use list, depending on the granularity that you desire, you may do so by including one of

#include <boost/fusion/sequence.hpp>
#include <boost/fusion/sequence/container.hpp>
#include <boost/fusion/sequence/container/list.hpp>

The first includes all sequences. The second includes all of sequence containers. The third includes only list ^[3] .