slice() [1/2]

std::optional< CompositeSlice > MayaFlux::Kakshya::CompositeAccess::slice

(

const Region &

region

)

const

Borrow the elements selected by a one-dimensional Region.

Parameters

region

Inclusive element bounds and optional Region attributes.

Returns

Slice retaining the Region, or std::nullopt for invalid bounds.

Definition at line 83 of file CompositeAccess.cpp.

{
    if (region.start_coordinates.size() != 1 || region.end_coordinates.size() != 1)
        return std::nullopt;
 
    const auto start = region.start_coordinates[0];
    const auto end = region.end_coordinates[0];
 
    if (start > end || end >= size())
        return std::nullopt;
 
    return CompositeSlice(*this, static_cast<size_t>(start),
        static_cast<size_t>(end - start + 1), region);
}

References MayaFlux::Kakshya::Region::end_coordinates, size(), and MayaFlux::Kakshya::Region::start_coordinates.

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