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Add util::array mirroring

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This commit is contained in:
Nikita Lisitsa 2020-10-26 18:38:22 +03:00
parent 1b8ef017ad
commit d88799f308
1 changed files with 15 additions and 0 deletions
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15
libs/util/include/psemek/util/array.hpp
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@ -376,6 +376,21 @@ namespace psemek::util
data_ = std::move(data);
}
template <typename T, std::size_t N>
void mirror(array<T, N> & a, std::size_t i)
{
assert(i < N);
auto const s = a.dim(i);
for (auto idx : a.indices())
{
auto jdx = idx;
jdx[i] = s - 1 - jdx[i];
if (jdx[i] < idx[i])
std::swap(a(idx), a(jdx));
}
}
template <typename F, typename T, std::size_t N>
auto map(F && f, array<T, N> const & a)
{