Function rustc_const_eval::const_eval::valtrees::valtree_to_const_value

pub fn valtree_to_const_value<'tcx>(
    tcx: TyCtxt<'tcx>, 
    ty: Ty<'tcx>, 
    valtree: ValTree<'tcx>
) -> ConstValue<'tcx>

Converts a ValTree to a ConstValue, which is needed after mir construction has finished.