[/
    Copyright 2010 Neil Groves
    Distributed under the Boost Software License, Version 1.0.
    (See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
/]
[section:adjacent_difference adjacent_difference]

[heading Prototype]

``
template<
    class SinglePassRange,
    class OutputIterator
    >
OutputIterator adjacent_difference(
    const SinglePassRange& source_rng,
    OutputIterator out_it);

template<
    class SinglePassRange,
    class OutputIterator,
    class BinaryOperation
    >
OutputIterator adjacent_difference(
    const SinglePassRange& source_rng,
    OutputIterator out_it,
    BinaryOperation op);
``

[heading Description]

`adjacent_difference` calculates the differences of adjacent_elements in `rng`.

The first version of `adjacent_difference` uses `operator-()` to calculate the differences.
The second version uses `BinaryOperation` instead of `operator-()`.

[heading Definition]

Defined in the header file `boost/range/numeric.hpp`

[heading Requirements]

[heading For the first version]

# `SinglePassRange` is a model of the __single_pass_range__ Concept.
# `OutputIterator` is a model of the `OutputIteratorConcept`.
# If `x` and `y` are objects of `SinglePassRange`'s value type, then `x - y` is defined.
# The value type of `SinglePassRange` is convertible to a type in `OutputIterator`'s set of value types.
# The return type of `x - y` is convertible to a type in `OutputIterator`'s set of value types.

[heading For the second version]

# `SinglePassRange` is a model of the __single_pass_range__ Concept.
# `OutputIterator` is a model of the `OutputIteratorConcept`.
# `BinaryOperation` is a model of the `BinaryFunctionConcept`.
# The value type of `SinglePassRange` is convertible to `BinaryOperation`'s first and second argument types.
# The value type of `SinglePassRange` is convertible to a type in `OutputIterator`'s set of value types.
# The result type of `BinaryOperation` is convertible to a type in `OutputIterator`'s set of value types.

[heading Precondition:]

`[result, result + distance(rng))` is a valid range.

[heading Complexity]

Linear. If `empty(rng)` then zero applications, otherwise `distance(rng) - 1` applications are performed.

[endsect]