Function rustc_mir_build::build::expr::as_place::convert_to_hir_projections_and_truncate_for_capture

fn convert_to_hir_projections_and_truncate_for_capture<'tcx>(
    mir_projections: &[PlaceElem<'tcx>]
) -> Vec<HirProjectionKind>

Given a list of MIR projections, convert them to list of HIR ProjectionKind. The projections are truncated to represent a path that might be captured by a closure/generator. This implies the vector returned from this function doesn’t contain ProjectionElems Downcast, ConstantIndex, Index, or Subslice because those will never be part of a path that is captued by a closure. We stop applying projections once we see the first projection that isn’t captured by a closure.