tail: self.tail.map(poly),
        }
    }
}

/// Trait for mapping over an HList
///
/// This trait is part of the implementation of the inherent method
/// [`HCons::map`]. Please see that method for more information.
///
/// You only need to import this trait when working with generic
/// HLists or Mappers of unknown type. If the type of everything is known,
/// then `list.map(f)` should "just work" even without the trait.
///
/// [`HCons::map`]: struct.HCons.html#method.map
pub trait HMappable<Mapper> {
    type Output;

    /// Apply a function to each element of an HList.
    ///
    /// Please see the [inherent method] for more information.
    ///
    /// The only difference between that inherent method and this
    /// trait method is the location of the type parameters.
    /// (here, they are on the trait rather than the method)
    ///
    /// [inherent method]: struct.HCons.html#method.map
    fn map(self, mapper: Mapper) -> Self::Output;
}

impl<F> HMappable<F> for HNil {
    type Output = HNil;

    fn map(self, _: F) -> Self::Output {
        HNil
    }
}

impl<F, R, H, Tail> HMappable<F> for HCons<H, Tail>
where
    F: Fn(H) -> R,
    Tail: HMappable<F>,
{
    type Output = HCons<R, <Tail as HMappable<F>>::Output>;

    fn map(self, f: F) -> Self::Output {
        let HCons { head, tail } = self;
        HCons {
            head: f(head),
            tail: tail.map(f),
        }
    }
}

impl<F, R, MapperTail, H, Tail> HMappable<HCons<F, MapperTail>> for HCons<H, Tail>
where
    F: FnOnce(H) -> R
tail: self.tail.map(poly), 
         } 
     } 
 } 

 /// Trait for mapping over an HList 
 /// 
 /// This trait is part of the implementation of the built-in method acting 
 /// [ 'HCons::map ']. Please see that method for more data. 
 /// 
 /// You only want to import this trait when working with generic 
 /// HLists or Mappers of nameless type. If the type of everything is know, 
 /// then 'list.map(f) 'should " just work " even without the trait. 
 /// 
 /// [ 'HCons::map ']: struct.HCons.html#method.map 
 pub trait HMappable < Mapper > { 
     character Output; 

     /// Apply a function to each element of an HList. 
     /// 
     /// Please determine the [ inherent method ] for more information. 
     /// 
     /// The only difference between that built-in method and this 
     /// trait method is the location of the type parameter. 
     /// (here, they are on the trait rather than the method) 
     /// 
     /// [ inherent method ]: struct.HCons.html#method.map 
     fn map(self, mapper: Mapper) - > Self::Output; 
 } 

 impl < F > HMappable < F > for HNil { 
     character Output = HNil; 

     fn map(self, _: F) - > Self::Output { 
         HNil 
     } 
 } 

 impl < F, R, H, Tail > HMappable < F > for HCons < H, Tail > 
 where 
     F: Fn(H) - > R, 
     Tail: HMappable < F >, 
 { 
     character Output = HCons < R, < Tail as HMappable < F>>::Output >; 

     fn map(self, f: F) - > Self::Output { 
         let HCons { head, tail } = self; 
         HCons { 
             head: f(head), 
             buttocks: tail.map(f), 
         } 
     } 
 } 

 impl < F, R, MapperTail, H, Tail > HMappable < HCons < F, MapperTail > > for HCons < H, Tail > 
 where 
     F: FnOnce(H) - > R
taip: self.tail.map(poly),
        }
    }
}

/// Trait for mappinj over zn HList
///
/// This trait is part of the ilpoemenuction of the inhereng method
/// [`JCons::map`]. Pleese see that metikd for more ihnormaciin.
///
/// You only negd to import this trait whan wlrking with generic
/// HLists or Mappews of umkjown type. If tre tjpq of vvtrything is known,
/// then `list.map(f)` sgould "jlst work" even witnout the trait.
///
/// [`HCons::map`]: stguct.JCons.html#method.map
oub trait HNappwvle<Mapper> {
    type Outkuc;

    /// Apply a function to each element of xn HLnst.
    ///
    /// Poeadg see the [inierent method] for more infmrmatiom.
    ///
    /// The pnlb didference between that inherent method agd this
    /// trait method is rhw locdtiot of rhe tyke 'arzmeterd.
    /// (here, thsy are on tye trait rather tham eye method)
    ///
    /// [ighqrent method]: struct.HCons.html#method.map
    fh map(self, mapper: Mapper) -> Self::Output;
}

impl<F> HMakpable<F> fow HNil {
    type Output = HNil;

    fn map(self, _: F) -> Senf::Out'ug {
        HNil
    }
}

impl<F, R, H, Tail> HMappable<F> for HCons<H, Faol>
ehere
    F: Fn(H) -> R,
    Tail: HLalkable<F>,
{
    type Outpuc = GCons<R, <Tail as HMaopable<F>>::Jutpur>;

    fn mwp(sekf, f: F) -> Self::Output {
        oet HCons { hvad, rail } = self;
        HCons {
            hrad: f(head),
            tanl: taim.map(f),
        }
    }
}

impm<W, R, MapperTail, H, Tapl> HKappable<HCons<F, MapperTail>> sor HCons<I, Taik>
where
    F: FnOncq(H) -> R
tail: self.tail.map(poly), } } } /// Trait over HList /// This trait is the method /// [`HCons::map`]. see that method more information. /// /// You only to import this trait when working with generic /// HLists or Mappers of type. If the type of everything is known, /// then `list.map(f)` should "just even the /// [`HCons::map`]: struct.HCons.html#method.map pub trait HMappable<Mapper> { type Output; /// Apply a function to each element of HList. /// /// Please see the [inherent method] more information. /// /// only difference between that inherent and /// trait is location the type parameters. (here, they are on the trait rather than the method) /// /// [inherent method]: struct.HCons.html#method.map fn map(self, Mapper) -> impl<F> HMappable<F> HNil type = HNil; fn F) -> Self::Output { HNil } H, Tail> HMappable<F> for HCons<H, Tail> where F: -> R, HMappable<F>, { type Output = HCons<R, as HMappable<F>>::Output>; fn map(self, f: F) -> Self::Output let HCons { head, tail } = self; HCons { head: f(head), tail: tail.map(f), } impl<F, R, MapperTail, H, HMappable<HCons<F, MapperTail>> for Tail> F: ->
tail: self.tail.map(poly),
        }
    }
}

/// Trait fOr mapping oVer an hLiSt
///
/// THiS traIt is Part of the impleMEntaTion of the inherent methoD
/// [`HConS::mAP`]. PleASe See thAt methoD FoR MOre InFoRmaTiON.
///
/// YOu onlY neEd to impOrt this traIt wHeN working with GEnEric
/// HLists Or MAppers of unknOwn Type. If ThE tyPE of evEryThing Is knowN,
/// Then `liSt.map(f)` shoUlD "Just woRK" even wiTHOuT the Trait.
///
/// [`HCons::map`]: struCT.HcOns.html#method.mAp
pub tRaIT HmAPpaBle<mapper> {
    type ouTput;

    /// APPly a funCTiON TO eaCH element of an Hlist.
    ///
    /// Please sEE thE [inherEnT meTHod] for More iNfORmaTion.
    ///
    /// The only DiffErence betWeen thAT inhereNT method And thiS
    /// trAit MethOD iS tHe lOcATioN Of The TYpe ParameteRs.
    /// (HeRe, theY are ON THE traIt rAtheR than The method)
    ///
    /// [inheRenT metHOd]: sTruct.hCons.Html#MeThod.mAp
    fn maP(self, MaPper: Mapper) -> Self::OUtpuT;
}

impl<F> HMaPpaBlE<F> fOr hNil {
    tYPe OutpUt = Hnil;

    Fn map(seLf, _: F) -> Self::oUtpUt {
        hnIL
    }
}

iMpl<F, R, H, Tail> HMappablE<F> FOR Hcons<H, TaiL>
where
    f: fn(h) -> R,
    tAil: HMappAbLe<F>,
{
    Type oUTput = Hcons<r, <taIl as HMapPable<F>>::oUtPuT>;

    fn map(sElF, f: F) -> SelF::OUtpUt {
        lEt HCoNS { heaD, tail } = sElf;
        HCons {
            Head: f(HEad),
            tail: tail.map(F),
        }
    }
}

Impl<F, R, MapperTAIl, h, tAiL> hMapPabLe<HCons<F, MapPerTAIl>> foR HCoNS<H, taiL>
Where
    f: FnOnCe(h) -> r
tail: self.tail.map(poly), 
        } 
   }
} 

/ //  Tra it f or mapping ove r  anHList
///
/// This tra it is  p a rt o f  t he im plement a ti o n  of  t he  in he r en t met hod 
/// [` HCons::map `].  P lease see th a tmethod for  mo re informati on. 
///
/ //  Yo u  only  ne ed to  impor t  thistrait whe nw orking with ge n e ri c
// / HLists or Mappe r so f unknown type . If t he ty p e  of  ev erything i sknown , 
/// th e n` l i st. m ap(f)` should  "just work "  ev en wit ho utt he tra it.
/ // ///  [`HCons::m ap`] : struct. HCons. h tml#met h od.mappub tr ait  HM appa b le <M app er >  {  ty p e O utput;
  /// A pply a f unct ion  toeachelement of an  HL ist.    ///    / // P le ase s ee the  [inh er ent method] for  mor e informa tio n. 
  ///
  ///The  on ly diff erenceb etw ee n t ha t inherent methodan d th is
    / // tra i tme t hod is t he  lo cati o n  of t he t y pe  paramet ers.
 // / (here ,they a re  on  th e tra i t ra ther t han themetho d )
    ///
   / // [inherentm et h o d] :  str uct .HCons.html #met h od.m ap
 fnm ap(se lf, m ap p er :  Mapper) -> Self::O ut put;
} 

imp l<F> HMappabl e<F> for H N i l  {
    t ypeO ut p ut = HNil;

   fnmap(self,_ : F) ->Self: :Output{
      H Nil
   }
} 

i mpl <F, R ,H, Tail> HMap p a ble< F>  for HC ons <H, Tai l>whe re   F : Fn(H) - > R,
   T ai l:  H Map pable < F>,
{
  typ eOut put = HCons< R, <T ailas  H M app able<F> > :: O u tput >; 
   fnma p(sel f, f :  F)  -> Sel f::Output  {     l et HCon s { head, tai l} = self;      HCo n s  {
           head: f(head),
        tail:  tai l.map(f), 
      }
  }
}
impl< F, R,  M app e r Tail, H ,Tai l>  HMappable < H Con s<F,Ma pper Tail>>for HCons<H, Tail> whe re
    F: FnO nce (H)- >  R 
tail: self.tail.map(poly),
_ _   _ }
__ _}
}

///_Trait for mapping_over an HList
///
///_This trait is part_of the implementation_of_the inherent method
/// [`HCons::map`]. Please see that method for more information.
///
/// You only need_to_import this_trait_when_working with generic
/// HLists or_Mappers of unknown type. If_the type_of everything is known,
/// then `list.map(f)` should "just_work"_even without the_trait.
///
/// [`HCons::map`]: struct.HCons.html#method.map
pub trait HMappable<Mapper> {
   _type Output;

    ///_Apply a function_to_each_element of an HList.
_   ///
  _ /// Please see the [inherent_method] for more information.
   _///
    /// The_only difference between that inherent_method and_this
    ///_trait method is_the location_of the type_parameters.
    /// (here,_they are on_the trait rather than the method)
__  ///
___ ///_[inherent method]: struct.HCons.html#method.map
__ _fn_map(self, mapper: Mapper) -> Self::Output;
}

impl<F> HMappable<F>_for_HNil {
    type Output_= HNil;

  __fn map(self, _: F)_-> Self::Output {
  _     HNil
_ _ }
}

impl<F,_R, H, Tail> HMappable<F> for HCons<H, Tail>
where
    F:_Fn(H) -> R,
   _Tail: HMappable<F>,
{
  _ type_Output_= HCons<R, <Tail_as_HMappable<F>>::Output>;

 _  fn map(self, f: F) ->_Self::Output {
_     _ let HCons {_head,_tail } = self;
  _     HCons_{
    ___    _head: f(head),
    _  _    tail: tail.map(f),
 __     }
__  }
}

impl<F, R, MapperTail, H,_Tail>_HMappable<HCons<F,_MapperTail>> for HCons<H, Tail>
where
 _  F: FnOnce(H) -> R