Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::proto::data_type —
The type of proto::data, a key for use when creating
a transform environment that associates a piece of data with this type.
// In header: <boost/proto/transform/env.hpp> struct data_type { // public member functions template<typename Value> env<data_type,see-below> operator=(Value &) const; template<typename Value> env<data_type,see-below> operator=(Value const &) const; };
The proto::data_type type, along with the proto::data
global, are declared using the BOOST_PROTO_DEFINE_ENV_VAR() macro.
data_type public member functionstemplate<typename Value> env<data_type,see-below> operator=(Value & value) const; template<typename Value> env<data_type,see-below> operator=(Value const & value) const;
If Value is a specialization boost::reference_wrapper<T>,
this function returns env<data_type, T &>(value.get()).
Else, if the type Value is non-copyable (i.e., a function, an array, abstract, or an ostream),
this function returns env<data_type, Value ,
where cv &>(value)cvconst for the second overload, and empty
for the first.
Otherwise, this function returns env<data_type, Value>(value).