in

Read a Sequence from an input stream.

template <typename IStream, typename Sequence>
IStream&
operator>>(IStream& is, Sequence& seq);

Parameter	Requirement	Description
is	An input stream.	Stream to extract information from.
seq	A Sequence.	The sequence to read.

is >> seq

Return type: IStream&

Semantics: For each element, e, in sequence, seq, call is >> e.

#include <boost/fusion/sequence/io/in.hpp>

vector<int, std::string, char> v;
std::cin >> v;