Boost C++ Libraries

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make_map

Description

Create a map from one or more key/data pairs.

Synopsis

template <
    typename K0, typename K1,... typename KN
  , typename T0, typename T1,... typename TN>
typename result_of::make_map<K0, K0,... KN, T0, T1,... TN>::type
make_map(T0 const& x0, T1 const& x1... TN const& xN);

The variadic function accepts 0 to FUSION_MAX_VECTOR_SIZE ^[10] elements, where FUSION_MAX_VECTOR_SIZE is a user definable predefined maximum that defaults to 10. You may define the preprocessor constant FUSION_MAX_VECTOR_SIZE before including any Fusion header to change the default. Example:

#define FUSION_MAX_VECTOR_SIZE 20

Parameters

Parameter	Requirement	Description
`K0, K1,... KN`	The key types	Keys associated with `x0, x1,... xN`
`x0, x1,... xN`	Instances of `T0, T1,... TN`	The arguments to `make_map`

Expression Semantics

make_map<K0, K1,... KN>(x0, x1,... xN);

Return type: result_of::make_map<K0, K0,... KN, T0, T1,... TN>::type

Semantics: Create a map from K0, K1,... KN keys and x0, x1,... xN data.

Precondition: There may be no duplicate key types.

Header

#include <boost/fusion/container/generation/make_map.hpp>
#include <boost/fusion/include/make_map.hpp>

Example

make_map(
    make_pair<int>('X')
  , make_pair<double>("Men"))

See also

boost::ref, fusion::pair

^[10] map is implemented in terms of the vector. That is why we reuse FUSION_MAX_VECTOR_SIZE