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

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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

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;

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