Boost C++ Libraries

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deref

Description

Deferences an iterator.

Synopsis

template<
    typename I
    >
typename result_of::deref<I>::type deref(I const& i);

Table 1.1. Parameters

Parameter	Requirement	Description
`i`	Model of Forward Iterator	Operation's argument

Expression Semantics

deref(i);

Return type: result_of::deref<I>::type

Semantics: Dereferences the iterator i.

Header

#include <boost/fusion/iterator/deref.hpp>
#include <boost/fusion/include/deref.hpp>

Example

typedef vector<int,int&> vec;

int i(0);
vec v(1,i);
assert(deref(begin(v)) == 1);
assert(deref(next(begin(v))) == 0);
assert(&(deref(next(begin(v)))) == &i);