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61 lines
2.0 KiB
Plaintext
61 lines
2.0 KiB
Plaintext
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[/
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Copyright 2010 Neil Groves
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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/]
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[section:partial_sum partial_sum]
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[heading Prototype]
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``
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template<class SinglePassRange,
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class OutputIterator>
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OutputIterator partial_sum(const SinglePassRange& rng,
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OutputIterator out_it);
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template<class SinglePassRange,
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class OutputIterator,
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class BinaryOperation>
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OutputIterator partial_sum(const SinglePassRange& rng,
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OutputIterator out_it,
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BinaryOperation op);
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``
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[heading Description]
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`partial_sum` calculates a generalised partial sum of `rng` in the same manner as
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`std::partial_sum(boost::begin(rng), boost::end(rng), out_it)`. See __sgi_partial_sum__.
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[heading Definition]
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Defined in the header file `boost/range/numeric.hpp`
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[heading Requirements]
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[heading For the first version]
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# `SinglePassRange` is a model of the __single_pass_range__ Concept.
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# `OutputIterator` is a model of the `OutputIteratorConcept`.
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# If `x` and `y` are objects of `SinglePassRange`'s value type, then `x + y` is defined.
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# The return type of `x + y` is convertible to the value type of `SinglePassRange`.
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# The value type of `SinglePassRange` is convertible to a type in `OutputIterator`'s set of value types.
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[heading For the second version]
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# `SinglePassRange` is a model of the __single_pass_range__ Concept.
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# `OutputIterator` is a model of the `OutputIteratorConcept`.
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# `BinaryOperation` is a model of the `BinaryFunctionConcept`.
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# The result type of `BinaryOperation` is convertible to the value type of `SinglePassRange`.
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# The value type of `SinglePassRange` is convertible to a type in `OutputIterator`'s set of value types.
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[heading Precondition:]
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`[result, result + distance(rng))` is a valid range.
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[heading Complexity]
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Linear. If `empty(rng)` then zero applications, otherwise `distance(rng) - 1` applications are performed.
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[endsect]
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