Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Boost
C++ Libraries
...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
Returns a new sequence without nested sequences.
template< typename Sequence > typenameresult_of::flatten<Sequence>::type flatten(Sequence& seq); template< typename Sequence > typenameresult_of::flatten<Sequence const>::type flatten(Sequence const& seq);
Table 1.86. Parameters
|
Parameter |
Requirement |
Description |
|---|---|---|
|
|
A model of Forward Sequence |
Operation's argument |
flatten(seq);
Return type:
Semantics: Returns a new sequence containing
all the leaf elements of seq.
Constant. Returns a view which is lazily evaluated.
#include <boost/fusion/algorithm/transformation/flatten.hpp> #include <boost/fusion/include/flatten.hpp>
constvector<int, int,vector<int, int>, int> vec(1, 2,make_vector(3, 4), 5); assert(flatten(vec) ==make_vector(1, 2, 3, 4, 5)));