boost::xpressive::reference< T > Struct Template Reference

reference<> is a lazy wrapper for a reference that can be used in xpressive semantic actions. More...

#include <xpressive_fwd.hpp>

Inheritance diagram for boost::xpressive::reference< T >:

Collaboration diagram for boost::xpressive::reference< T >:

Public Types
typedef proto::extends < typename proto::terminal < reference_wrapper< T > >::type, reference< T > >	base_type
	INTERNAL ONLY. More...

Public Member Functions
	reference (T &t)
	Store a reference to t. More...
T &	get () const
	Fetch the stored value. More...

Detailed Description

template<typename T>
struct boost::xpressive::reference< T >

reference<> is a lazy wrapper for a reference that can be used in xpressive semantic actions.

Template Parameters

T	The type of the referent.

Here is an example of how to use reference<> to create a lazy reference to an existing object so it can be read and written in an xpressive semantic action.

using namespace boost::xpressive;
std::map<std::string, int> result;
reference<std::map<std::string, int> > result_ref(result);

// Match a word and an integer, separated by =>,
// and then stuff the result into a std::map<>
sregex pair = ( (s1= +_w) >> "=>" >> (s2= +_d) )
    [ result_ref[s1] = as<int>(s2) ];

Member Typedef Documentation

template<typename T >

typedef proto::extends<typename proto::terminal<reference_wrapper<T> >::type, reference<T> > boost::xpressive::reference< T >::base_type

INTERNAL ONLY.

Constructor & Destructor Documentation

template<typename T >

boost::xpressive::reference< T >::reference ( T &  t )

inlineexplicit

Store a reference to t.

Parameters

t	Reference to object

Member Function Documentation

template<typename T >

T& boost::xpressive::reference< T >::get ( ) const

inline

Fetch the stored value.

References boost::proto::value().

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

• boost_1_57_0/boost/xpressive/regex_actions.hpp