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ircd::util: Add output iterator bounded pointers transform.

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This commit is contained in:
Jason Volk 2018-05-08 14:28:43 -07:00
parent 39b49599e5
commit 070f359707
1 changed files with 19 additions and 1 deletions
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20
include/ircd/util/pointers.h
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@ -35,13 +35,31 @@ pointers(input_begin&& ib,
});
}
/// Transform input sequence values to pointers in the output sequence
/// using two input iterators [begin, end] and one output iterator [begin]
template<class input_begin,
class input_end,
class output_begin,
class output_end>
auto
pointers(input_begin&& ib,
const input_end &ie,
output_begin&& ob,
const output_end &oe)
{
for(; ib != ie && ob != oe; ++ib, ++ob)
*ob = std::addressof(*ib);
return ob;
}
template<class input_container,
class output_container>
auto
pointers(input_container&& ic,
output_container &oc)
{
return pointers(begin(ic), end(ic), begin(oc));
return pointers(begin(ic), end(ic), begin(oc), end(oc));
}
} // namespace util