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        flatten_view presents a view
        which iterates over its elements recursively in depth-first order.
      
#include <boost/fusion/view/flatten_view.hpp> #include <boost/fusion/include/flatten_view.hpp>
template <typename Sequence> struct flatten_view;
| Parameter | Description | Default | 
|---|---|---|
| 
                   | 
Notation
F
              A flatten_view type
            
s
              An instance of Sequence
            
f, f2
              Instances of F
            
Semantics of an expression is defined only where it differs from, or is not defined in Forward Sequence.
| Expression | Semantics | 
|---|---|
| 
                   | 
                  Creates a  | 
| 
                   | 
                  Copy constructs a  | 
| 
                   | 
                  Assigns to a  | 
typedefvector<int, int,vector<int, int>, int> sequence_type; sequence_type seq;flatten_view<sequence_type> flattened(seq);copy(make_vector(1, 2, 3, 4, 5), flattened); assert(seq ==make_vector(1, 2,make_vector(3, 4), 5));