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[/
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:partial_sum partial_sum]
[heading Prototype]
``
template<class SinglePassRange,
class OutputIterator>
OutputIterator partial_sum(const SinglePassRange& rng,
OutputIterator out_it);
template<class SinglePassRange,
class OutputIterator,
class BinaryOperation>
OutputIterator partial_sum(const SinglePassRange& rng,
OutputIterator out_it,
BinaryOperation op);
``
[heading Description]
`partial_sum` calculates a generalised partial sum of `rng` in the same manner as
`std::partial_sum(boost::begin(rng), boost::end(rng), out_it)`. See __sgi_partial_sum__.
[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 return type of `x + y` is convertible to the value type of `SinglePassRange`.
# The value type of `SinglePassRange` 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 result type of `BinaryOperation` is convertible to the value type of `SinglePassRange`.
# The value type of `SinglePassRange` 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]
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