extern    crate    std    as    ruststd   ;

use   core    ::    hash  ::   {    self    ,    Hash    }    ;
use core ::intrinsics:: {arith_offset ,assume}  ;
use core::iter::FromIterator;
use    core  ::   mem;
use core::ops::{    Index ,IndexMut    };

const    CAPACITY   :usize    =    2*B-1;

fn     foo   (    a   :  i32   ,  b    :str,   c: i32   ,d:f32   )     ->    (   )   {
    let    mut   e   :   &  'static   [   str   ]   =   "abcd"   ;
    let mut f :& [str ]="cdef";
    bar ( ) ;
    let array :[  i32    ;   45 ]   =   [     0    ;45   ];
    let f: fn(i32, u64) -> i32;
    let f2   :   fn    (    i32    )->i32   ;
    let unit: (   )    =    (     );
    let foo = 2+2;
    let moo = 2*2;
    let meh = 2*2+3*3;
    else_block  .  as_ref  (  )  .  map   (   |   e   |    &   *  *   e   )   ;
    match self.node {
        ast   ::   ExprKind   ::  Field   (   ..   )    |
        ast::ExprKind::MethodCall(..   )=>rewrite_chain(self, context, width, offset)
    };
    let f:  fn  ( & _ , _  ) ->  _   =  unimplemented   !   ()  ;
    let f = unimplemented   !   {}   ;
        {
        foo   (    )   ;
    }
    for & (sample, radiance) in samples.iter() {}
    map(|& s| moo());
    match x {
        S{foo}=>92
    }
}

enum    Message    {
    Quit   ,
    ChangeColor   (   i32   ,     i32   ,    i32   )   ,
    Move    {    x   :    i32   ,      y   :    i32    }   ,
    Write   (   String   )   ,
}

enum Foo{
    Bar    =    123   ,
    Baz=0
}

pub    struct    Vec   <  T  >   {
    buf   :   RawVec   <  T>  ,
    len :usize  ,
}

impl   <T   >Vec  <  T  >  {
    pub   fn   new  (  )   ->   Vec <T> {
        Vec    {
            buf  :  RawVec  ::  new  (  )  ,
            len  :0,
        }
    }

    pub fn with_capacity (capacity :usize)->Vec <T>{
        Vec {
            buf:RawVec::with_capacity ( capacity ),
            len:0,
        }
    }

    pub unsafe fn from_raw_parts(ptr:* mut T, length :usize, capacity: usize) -> Vec <T>{
        Vec{
            buf :RawVec::from_raw_parts(ptr, capacity) ,
            len :length ,
        }
    }

    pub fn capacity( & self ) -> usize {
        self  .  buf  .  cap  (  )
    }

    pub   fn reserve(& mut self, additional: usize) {
        self. buf .reserve(self. len ,additional) ;
    }

    pub fn into_boxed_slice(  mut self  ) ->   Box  < [  T  ]  >   {
        unsafe{
            self  .  shrink_to_fit (  )  ;
            let   buf   =   ptr::read(  &  self  .  buf  );
            mem  ::  forget  (   self  )  ;
            buf.into_box()
        }
    }

    pub    fn    truncate(&mut self ,len: usize) {
        unsafe {
            while   len   <   self  .  len   {
                self  .  len   -=   1  ;
                let   len   =   self  .  len  ;
                ptr::drop_in_place(self.get_unchecked_mut(len));
            }
        }
    }

    pub fn  as_slice(& self) -> & [T] {
        self
    }

    pub fn as_mut_slice(&mut self) -> &  mut[T] {
        &  mut self   [  ..  ]
    }

    pub unsafe fn set_len(&  mut self, len: usize) {
        self  .  len   =   len;
    }

    pub fn remove(&mut self, index: usize) -> T {
        let len = self.len();
        assert!(index < len);
        unsafe {
            let ret;
            {
                let ptr = self.as_mut_ptr().offset(index    as    isize);
                ret = ptr::read(ptr);
                ptr::copy(ptr.offset (1), ptr, len-index-1);
            }
            self.set_len(len    -    1);
            ret
        }
    }

    pub fn retain   <   F   >   (   &   mut    self   ,    mut    f   :    F   ) where    F  :    FnMut   (   &   T   )    ->    bool
    {
        let len = self.len();
        let mut del = 0;
        {
            let   v   =   &  mut   *   *   self   ;

            for   i    in    0   ..   len    {
                if    !   f   (   &   v   [   i   ]   )    {
                    del    +=   1  ;
                }    else     if    del    >   0   {
                    v.swap(i   -   del, i);
                }
            }
        }
        if del>0{
            self.truncate(len-del);
        }
    }

    pub fn drain<R>(&mut self,range:R)->Drain<T>where R:RangeArgument <usize>{
        let len = self.len();
        let start   =   *  range.start()  .unwrap_or(  & 0  )  ;
        let end   =   *  range.  end().unwrap_or(  &  len  )  ;
        assert!(start <= end);
        assert!(end <= len);
    }
}

impl<T:Clone>Vec<T>{
    pub fn extend_from_slice(&mut self, other: &  [  T  ]  ){
        self.reserve(other.len());

        for i in 0..other.len(){
            let len = self.len();

            unsafe {
                ptr::write(self.get_unchecked_mut(len), other.get_unchecked(i).clone());
                self.set_len(len + 1);
            }
        }
    }
}

impl   <   T   :    PartialEq   >    Vec   <  T  >    {
    pub   fn    dedup   (  & mut    self )  {
        unsafe{
            let ln = self.len();
            if    ln    <=    1    {
                return  ;
            }

            let p = self.as_mut_ptr();
            let mut r:usize =1 ;
            let mut w:usize=1;

            while   r   <   ln   {
                let p_r = p.offset(  r as isize  );
                let p_wm1 = p.offset  (  (   w   -   1  )as isize  );
                if    *   p_r    !=*   p_wm1   {
                    if r!=w{
                        let p_w = p_wm1.offset(1);
                        mem::swap(  &   mut   *   p_r   ,   & mut    *  p_w );
                    }
                    w   +=   1;
                }
                r+=1 ;
            }

            self.truncate(w);
        }
    }
}

pub   fn   from_elem   <   T   :   Clone   >   (   elem  :T ,n:usize)    ->    Vec   <T>{
}

impl < T :Clone >Clone for Vec <T>{
    fn clone(&self) -> Vec<T> {
        <  [  T   ]  >  ::  to_vec  (   &   *   *   self   )
    }

    fn clone(&self) -> Vec<T> {
        ::   slice  ::to_vec( &** self)
    }

    fn clone_from(&mut self, other:& Vec <T>) {
        self.truncate(other . len());
        let len=self. len();
        self.clone_from_slice(& other [ .. len ]);
        self.extend_from_slice(& other[ len .. ]);
    }
}

impl< T:Hash>Hash for Vec<T> {
    fn hash<H :hash   ::   Hasher >( & self, state: &mut H) {
        Hash::hash(& **self, state)
    }
}

impl<T> Index   <   usize   >    for Vec  < T   >   {
    type   Output    =   T   ;

    fn index(&self, index: usize) ->& T {
        & ( * * self  )  [  index   ]
    }
}

impl  <  T  >   IndexMut   <   usize   >    for Vec   < T  >   {
    fn index_mut(&mut self, index: usize) -> &mut T {
        &   mut    (  *  *  self  )  [   index   ]
    }
}

impl<T> FromIterator<T> for Vec<T> {
    fn    from_iter    <   I    :    IntoIterator    <   Item     =    T   >   >   (   iter   :    I   )   ->    Vec  <  T >  {
        let mut iterator = iter.into_iter();
        let mut vector =    match    iterator . next ()     {
            None=>return      Vec::new()    ,
            Some    (   element   )    =>     {
                let(   lower    ,      _   )    =     iterator.size_hint();
                // ...
            }
        };
        // ...
    }
}

impl<T> IntoIterator for Vec<T> {
    type Item = T;
    type IntoIter = IntoIter<T>;

    fn into_iter(  mut    self  )   -> IntoIter<T> {
        unsafe{
            let ptr = self.as_mut_ptr();
            assume(!ptr.is_null());
            let begin    =    ptr     as    *   const    T   ;
            let    end    =    if    mem   ::   size_of    ::   <  T    >   (   )    ==    0    {
                arith_offset   (  ptr   as   *   const    i8   ,   self.len()    as   isize  )as*const T
            } else {
                ptr  .  offset  (self.len()as isize)as*  const T
            }  ;
            let buf = ptr::read(&  self.buf);
            mem::forget(self);
            IntoIter{
                _buf :buf,
                ptr: begin,
                end : end,
            }
        }
    }
}

impl   <   'a ,T    >IntoIterator for&    'a Vec   <  T   >    {
    type Item = & 'a T;
}

impl<T> Iterator for IntoIter<T> {
    fn   size_hint  (  &  self   )   ->    (  usize   ,   Option   <   usize   >  )    {
        let diff    =    (  self.end   as    usize  )-(  self.ptr as  usize);
        let size = mem::size_of::<T>();
        let exact = diff /(if     size   ==   0     {1}else{size});
        (   exact, Some(   exact   )   )
    }
}

impl<'a, T> Iterator for Drain<'a, T> {
    type Item = T;

    fn next(&mut self) -> Option<T> {
        self.iter.next().map(   |   elt   |    unsafe    {   ptr::read(elt as* const _ )   }  )
    }
}

trait    Extend   <   A   >    {
    fn    extend   <   T   :    IntoIterator   <   Item  =   A  >  >   (  &  mut self  ,    iterable  :   T  )  ;
}

impl   <    R   ,   F   :    FnOnce   (   )     ->   R   >    FnOnce   <   (  )   >   for   AssertRecoverSafe  <  F >  {
    extern   "rust-call"   fn    call_once  (   self  ,   _args  :   (  )  )   ->   R   {
        (  self  .  0  )  (  )
    }
}

fn   catch_unwind   <  F  :FnOnce  (  )   ->   R+UnwindSafe  ,    R  >  (  f  :F  )   ->   Result  <  R >   {
    let   mut   result   =   None  ;
    unsafe    {
        let result=&   mut   result  ;
        unwind  ::   try   (   move| |* result=Some(   f  (  )  )   )   ?
    }
    Ok  (   result   .  unwrap  (   )  )
}

fn   propagate  (  payload  :Box   <  Any+Send  >  )    ->    !   {}

impl<K,V>Root<K,V>{
    pub   fn   as_ref   (   &  self   )->    NodeRef   <  marker  ::  Immut  ,   K,V,   marker  ::  LeafOrInternal  >{
        NodeRef {
            root:   self   as    *  const   _    as    *  mut   _  ,
        }
    }
}

macro_rules!    vec    {
    ( $( $x:expr ),* ) => {
        {
            let mut temp_vec = Vec::new();
            $(
                temp_vec.push($x);
            )*
            temp_vec
        }
    };
}

mod    math    {
    type   Complex    =    (   f64  ,    f64   )   ;

    fn   sin   (   f   :     f64  )    ->    f64    {
        /* ... */
    }
}

fn foo(&& (x, _): && (i32, i32)) {}
