...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
BOOST_FUSION_ADAPT_STRUCT_NAMED and BOOST_FUSION_ADAPT_STRUCT_NAMED_NS are macros that can be used to generate all the necessary boilerplate to make an arbitrary struct a model of Random Access Sequence. The given struct is adapted using the given name.
BOOST_FUSION_ADAPT_STRUCT_NAMED( struct_name, adapted_name, (member_type0, member_name0) (member_type1, member_name1) ... ) BOOST_FUSION_ADAPT_STRUCT_NAMED_NS( struct_name, (namespace0)(namespace1)..., adapted_name, (member_type0, member_name0) (member_type1, member_name1) ... )
The above macros generate the necessary code to adapt struct_name
as a model of Random
Access Sequence while using adapted_name
as the name of the adapted struct. The sequence (namespace0)(namespace1)...
declares the namespace for adapted_name
.
It yields to a fully qualified name for adapted_name
of namespace0::namespace1::...
adapted_name
. If an empty namespace
sequence is given (that is a macro that expands to nothing), the adapted
view is placed in the global namespace. If no namespace sequence is given
(i.e. BOOST_FUSION_ADAPT_STRUCT_NAMED
),
the adapted view is placed in the namespace boost::fusion::adapted
.
The sequence of (member_typeN, member_nameN)
pairs declares the type and names of each
of the struct members that are part of the sequence.
The macros should be used at global scope, and struct_name
should be the fully namespace qualified name of the struct to be converted.
#include <boost/fusion/adapted/struct/adapt_struct_named.hpp> #include <boost/fusion/include/adapt_struct_named.hpp>
namespace demo { struct employee { std::string name; int age; }; } // boost::fusion::adapted::adapted_employee is now a Fusion sequence // referring to demo::employee BOOST_FUSION_ADAPT_STRUCT_NAMED( demo::employee, adapted_employee, (std::string, name) (int, age))