boost::proto::_byref Struct Reference

A unary CallableTransform that wraps its argument in a boost::reference_wrapper<>. More...

#include <arg.hpp>

Inheritance diagram for boost::proto::_byref:

Collaboration diagram for boost::proto::_byref:

Classes
struct	result
struct	result< This(T &)>
struct	result< This(T)>

Public Types
typedef void	proto_is_callable_

Public Member Functions
template<typename T >
boost::reference_wrapper< T > const	operator() (T &t) const
	Wrap the parameter t in a boost::reference_wrapper<> More...
template<typename T >
boost::reference_wrapper< T const > const	operator() (T const &t) const
	This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts. More...

Detailed Description

A unary CallableTransform that wraps its argument in a boost::reference_wrapper<>.

Example:

proto::terminal<int>::type i = {42};
boost::reference_wrapper<proto::terminal<int>::type> j
    = proto::when<_, proto::_byref(_)>()(i);
assert( boost::addressof(i) == boost::addressof(j.get()) );

Member Typedef Documentation

typedef void boost::proto::callable::proto_is_callable_

inherited

Member Function Documentation

template<typename T >

boost::reference_wrapper<T> const boost::proto::_byref::operator() ( T &  t ) const

inline

Wrap the parameter t in a boost::reference_wrapper<>

Parameters

t	The object to wrap

Returns

boost::ref(t)

Exceptions

nothrow

References boost::flyweights::t.

template<typename T >

boost::reference_wrapper<T const> const boost::proto::_byref::operator() ( T const &  t ) const

inline

This is an overloaded member function, provided for convenience. It differs from the above function only in what argument(s) it accepts.

References boost::flyweights::t.

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The documentation for this struct was generated from the following file:

• boost_1_57_0/boost/proto/transform/arg.hpp