at_key

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<<<<<<< .working Returns the result type of at_key ^[8] ======= Returns the result type of at_key ^[8] >>>>>>> .merge-right.r57125 .

<<<<<<< .working <<<<<<< .working <<<<<<< .working <<<<<<< .working <<<<<<< .working <<<<<<< .working Synopsis ======= ======= ======= ======= ======= ======= >>>>>>> .merge-right.r58559 >>>>>>> .merge-right.r58549 >>>>>>> .merge-right.r58299 >>>>>>> .merge-right.r57337 >>>>>>> .merge-right.r57242 Synopsis >>>>>>> .merge-right.r57125

template<
    typename Seq,
    typename Key>
struct at_key
{
    typedef unspecified type;
};

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Table 1.30. Parameters

=======

Table 1.30. Parameters

=======

Table 1.34. Parameters

=======

Table 1.34. Parameters

=======

Table 1.34. Parameters

=======

Table 1.34. Parameters

=======

Table 1.34. Parameters

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Parameter	Requirement	Description
`Seq`	A model of Forward Sequence	Argument sequence
`Key`	Any type	Key type

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Expression >>>>>>> .merge-right.r57125 Semantics

result_of::at_key<Seq, Key>::type

Return type: Any type.

Semantics: Returns the result of using at_key to access the element with key type Key in Seq.

Header

#include <boost/fusion/sequence/intrinsic/at_key.hpp>
#include <boost/fusion/include/at_key.hpp>

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typedef map<pair<int, char>, pair<char, char>, pair<double, char> > mymap;
BOOST_MPL_ASSERT((boost::is_same<result_of::at_key<mymap, int>::type, char&>));

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^[8] result_of::at_key reflects the actual return type of the function at_key. _sequence_s typically return references to its elements via the at_key function. If you want to get the actual element type, use result_of::value_at_key =======

^[8] =======

^[8] >>>>>>> .merge-right.r58559 >>>>>>> .merge-right.r58549 >>>>>>> .merge-right.r58299 >>>>>>> .merge-right.r57337 >>>>>>> .merge-right.r57242 result_of::at_key reflects the actual return type of the function at_key. _sequence_s typically return references to its elements via the at_key function. If you want to get the actual element type, use result_of::value_at_key >>>>>>> .merge-right.r57125

at_key

Expression =======

Expression >>>>>>> .merge-right.r57125 Semantics

Header