Function rustc_mir::const_eval::eval_queries::validate_and_turn_into_const

fn validate_and_turn_into_const<'tcx>(
    tcx: TyCtxt<'tcx>, 
    constant: RawConst<'tcx>, 
    key: ParamEnvAnd<'tcx, GlobalId<'tcx>>
) -> ConstEvalResult<'tcx>