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            Constructs a tie using a map sequence.
          
template <typename K0, typename K1,... typename KN, typename D0, typename D1,... typename DN>map<pair<K0, D0&>,pair<K1, D1&>,...pair<KN, DN&> > map_tie(D0& d0, D1& d1... DN& dN);
For C++11 compilers, the variadic function interface has no upper bound.
            For C++03 compilers, the variadic function accepts 0
            to FUSION_MAX_MAP_SIZE
            elements, where FUSION_MAX_MAP_SIZE
            is a user definable predefined maximum that defaults to 10, and a corresponding number of key types.
            You may define the preprocessor constant FUSION_MAX_MAP_SIZE
            before including any Fusion header to change the default. Example:
          
#define FUSION_MAX_MAP_SIZE 20
| Parameter | Requirement | Description | 
|---|---|---|
| 
                       | Any type | 
                      The key types associated with each of the  | 
| 
                       | 
                      Instances of  | 
                      The arguments to  | 
map_tie<K0, K1,... KN>(x0, x1,... xN);
            Return type: map<pair<K0, D0&>, pair<K1,
            D1&>,... pair<KN,
            DN&> >
          
            Semantics: Create a map of references from x0, x1,... xN with keys K0, K1,... KN
          
#include <boost/fusion/container/generation/map_tie.hpp> #include <boost/fusion/include/map_tie.hpp>
struct int_key; struct double_key; ... int i = 123; double d = 123.456; map_tie<int_key, double_key>(i, d)