ahead()

template<typename Handle >

const VisionStep * MayaFlux::Kinesis::Vision::VisionPass< Handle >::ahead ( size_t  offset = 1 ) const

inlinenoexcept

Op at offset steps ahead, or nullptr past the end.

Replaces the adjacency booleans derived by VisionSequence::Builder. Correct under any mutation of steps because it is evaluated at the point of use.

Definition at line 193 of file VisionContext.hpp.

    {
        const auto& steps = sequence->steps;
        const size_t at = index + offset;
        return at < steps.size() ? &steps[at] : nullptr;
    }

References MayaFlux::Kinesis::Vision::VisionPass< Handle >::index, offset, MayaFlux::Kinesis::Vision::VisionPass< Handle >::sequence, and MayaFlux::Kinesis::Vision::VisionSequence::steps.