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# joint_view

### Synopsis

    template<
          typename Sequence1
        , typename Sequence2
        >
    struct joint_view
    {
        // unspecified
        // ...
    };

### Description

A view into the sequence of elements formed by concatenating `Sequence1` and `Sequence2` elements.

### Header

    #include <boost/mpl/joint_view.hpp>

### Model of

- Forward Sequence

### Parameters

Parameter | Requirement | Description
--- | --- | ---
`Sequence1`, `Sequence2` | Forward Sequence | Sequences to create a view on.

### Expression semantics

The semantics of an expression are defined only where they differ from, or are not defined in Forward Sequence.

In the following table, `v` is an instance of `joint_view`, `s1` and `s2` are arbitrary Forward Sequences.

Expression | Semantics
--- | ---

    joint_view<s1,s2>
    joint_view<s1,s2>::type

A lazy Forward Sequence of all the elements in the ranges [`begin<s1>::type`, `end<s1>::type`), [`begin<s2>::type`, `end<s2>::type`).

`size<v>::type` | The size of `v`; `size<v>::value == size<s1>::value + size<s2>::value`; linear complexity; see Forward Sequence.

### Example

    typedef joint_view<
          range_c<int,0,10>
        , range_c<int,10,15>
        > numbers;

    BOOST_MPL_ASSERT(( equal< numbers, range_c<int,0,15> > ));

### See also

Sequences, Views, `filter_view`, `transform_view`, `zip_view`, `iterator_range`