joint_view

Description

joint_view presents a view which is a concatenation of two sequences.

Header

#include <boost/fusion/view/joint_view.hpp>
#include <boost/fusion/include/joint_view.hpp>

Synopsis

template <typename Sequence1, typename Sequence2>
struct joint_view;

Template parameters

Parameter	Description	Default
`Sequence1`	A Forward Sequence
`Sequence2`	A Forward Sequence

Model of

Forward Sequence

Notation

JV: A joint_view type
s1: An instance of Sequence1
s2: An instance of Sequence2
jv, jv2: Instances of joint_view

Expression Semantics

Semantics of an expression is defined only where it differs from, or is not defined in Forward Sequence.

Expression	Semantics
`JV(s1, s2)`	Creates a `joint_view` given sequences, `s1` and `s2`.
`JV(jv)`	Copy constructs a `joint_view` from another `joint_view`, `jv`.
`jv = jv2`	Assigns to a `joint_view`, `jv`, from another `joint_view`, `jv2`.

Example

vector<int, char> v1(3, 'x');
vector<std::string, int> v2("hello", 123);
joint_view<
    vector<int, char>
  , vector<std::string, int>
> view(v1, v2);
std::cout << view << std::endl;