## Visitable

# Trait Visitable

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    pub(crate) trait Visitable<'a, V: Visitor<'a>> {
        type Extra: Copy;

        // Required method
        fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result;
    }

## Required Associated Types§

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#### type Extra: Copy

## Required Methods§

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

## Implementations on Foreign Types§

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Cow<'_, str>

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#### type Extra = ()

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#### fn visit(&'a self, _vis: &mut V, _extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Result<(), ErrorGuaranteed>

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#### type Extra = ()

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#### fn visit(&'a self, _vis: &mut V, _extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for bool

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#### type Extra = ()

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#### fn visit(&'a self, _vis: &mut V, _extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for char

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#### type Extra = ()

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#### fn visit(&'a self, _vis: &mut V, _extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for u8

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#### type Extra = ()

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#### fn visit(&'a self, _vis: &mut V, _extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for usize

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#### type Extra = ()

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#### fn visit(&'a self, _vis: &mut V, _extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Span

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#### type Extra = ()

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#### fn visit(&'a self, _vis: &mut V, _extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ErrorGuaranteed

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#### type Extra = ()

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#### fn visit(&'a self, _vis: &mut V, _extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ByteSymbol

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#### type Extra = ()

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#### fn visit(&'a self, _vis: &mut V, _extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Ident

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, _extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Symbol

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#### type Extra = ()

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#### fn visit(&'a self, _vis: &mut V, _extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<(UseTree, NodeId)>

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#### type Extra = ()

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#### fn visit(&'a self, vis: &mut V, _extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<Arm>

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, (): Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<ExprField>

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, (): Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<FieldDef>

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, (): Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<GenericParam>

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, (): Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<Param>

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, (): Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<PatField>

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, (): Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<Stmt>

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, (): Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<Variant>

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, (): Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<WherePredicate>

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, (): Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<Box<Expr>>

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, (): Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<Box<Item>>

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, (): Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<Box<AssocItem>>

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#### type Extra = AssocCtxt

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#### fn visit(&'a self, visitor: &mut V, ctxt: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ThinVec<Box<ForeignItem>>

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, (): Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FxHashMap<Symbol, usize>

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#### type Extra = ()

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#### fn visit(&'a self, _vis: &mut V, _extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T1, T2> Visitable<'a, V> for (T1, T2)
where T1: Visitable<'a, V, Extra = ()>, T2: Visitable<'a, V, Extra = ()>,

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T1, T2, T3> Visitable<'a, V> for (T1, T2, T3)
where T1: Visitable<'a, V, Extra = ()>, T2: Visitable<'a, V, Extra = ()>, T3: Visitable<'a, V, Extra = ()>,

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T1, T2, T3, T4> Visitable<'a, V> for (T1, T2, T3, T4)
where T1: Visitable<'a, V, Extra = ()>, T2: Visitable<'a, V, Extra = ()>, T3: Visitable<'a, V, Extra = ()>, T4: Visitable<'a, V, Extra = ()>,

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#### type Extra = ()

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for Option<T>
where T: Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for [T]
where T: Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for (T,)
where T: Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for Spanned<T>
where T: Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for Box<T>
where T: Visitable<'a, V> + ?Sized,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for Vec<T>
where T: Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for ThinVec<(Ident, Option<Ident>)>
where &'a ThinVec<(Ident, Option<Ident>)>: IntoIterator<Item = &'a T>, T: 'a + Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for ThinVec<(NodeId, Path)>
where &'a ThinVec<(NodeId, Path)>: IntoIterator<Item = &'a T>, T: 'a + Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for ThinVec<AngleBracketedArg>
where &'a ThinVec<AngleBracketedArg>: IntoIterator<Item = &'a T>, T: 'a + Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for ThinVec<PreciseCapturingArg>
where &'a ThinVec<PreciseCapturingArg>: IntoIterator<Item = &'a T>, T: 'a + Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for ThinVec<Attribute>
where &'a ThinVec<Attribute>: IntoIterator<Item = &'a T>, T: 'a + Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for ThinVec<Pat>
where &'a ThinVec<Pat>: IntoIterator<Item = &'a T>, T: 'a + Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for ThinVec<PathSegment>
where &'a ThinVec<PathSegment>: IntoIterator<Item = &'a T>, T: 'a + Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for ThinVec<TyPat>
where &'a ThinVec<TyPat>: IntoIterator<Item = &'a T>, T: 'a + Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

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### impl<'a, V: Visitor<'a>, T> Visitable<'a, V> for ThinVec<Box<Ty>>
where &'a ThinVec<Box<Ty>>: IntoIterator<Item = &'a T>, T: 'a + Visitable<'a, V>,

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#### type Extra = <T as Visitable<'a, V>>::Extra

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#### fn visit(&'a self, visitor: &mut V, extra: Self::Extra) -> V::Result

## Implementors§

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for AngleBracketedArg

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for AsmMacro

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for AssignOpKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for AssocItemConstraintKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for AttrArgs

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for AttrKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for AttrStyle

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for BinOpKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for BlockCheckMode

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for BorrowKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for BoundAsyncness

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for BoundConstness

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for BoundPolarity

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ByRef

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for CaptureBy

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ClosureBinder

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Const

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ConstItemRhs

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for CoroutineKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Defaultness

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Extern

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FnRetTy

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ForLoopKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for GenBlockKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for GenericArg

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for GenericArgs

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for GenericBound

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#### type Extra = BoundKind

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for GenericParamKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ImplPolarity

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Inline

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for InlineAsmOperand

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for InlineAsmRegOrRegClass

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for InlineAsmTemplatePiece

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for IsAuto

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for LocalKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for MacStmtStyle

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for MatchKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ModKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Movability

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Mutability

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Parens

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for PatFieldsRest

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for PatKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Pinnedness

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for PreciseCapturingArg

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for RangeEnd

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for RangeLimits

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for RangeSyntax

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Recovered

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Safety

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for StrStyle

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for StructRest

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Term

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for TraitObjectSyntax

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for TyKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for TyPatKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for UnOp

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for UnsafeBinderCastKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for UnsafeSource

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for UseTreeKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for VariantData

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for VisibilityKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for WherePredicateKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for YieldKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FormatArgsPiece

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FormatArgumentKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for CommentKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Delimiter

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for LitKind

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for AngleBracketedArgs

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for AnonConst

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Arm

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for AssocItemConstraint

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for AttrId

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for AttrItem

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Attribute

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for BindingMode

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Block

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Closure

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ConstItem

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Crate

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Delegation

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for DelegationMac

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for DelimArgs

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for EnumDef

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Expr

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ExprField

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FieldDef

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FnContract

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FnDecl

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FnHeader

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FnPtrTy

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ForeignMod

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for GenericParam

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Generics

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Impl

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for InlineAsm

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for InlineAsmSym

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Item

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Label

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Lifetime

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#### type Extra = LifetimeCtxt

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Local

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for MacCall

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for MacCallStmt

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for MacroDef

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for MethodCall

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ModSpans

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for MutTy

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for NormalAttr

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Param

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ParenthesizedArgs

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Pat

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for PatField

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Path

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for PathSegment

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for PolyTraitRef

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for QSelf

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for StaticItem

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for StrLit

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for StructExpr

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Trait

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for TraitBoundModifiers

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for TraitRef

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Ty

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for TyAlias

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for TyPat

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for UnsafeBinderTy

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for UseTree

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Variant

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Visibility

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for WhereBoundPredicate

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for WhereClause

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for WhereEqPredicate

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for WherePredicate

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for WhereRegionPredicate

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FormatArgPosition

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FormatArgs

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FormatArgument

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FormatArguments

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for FormatPlaceholder

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for NodeId

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for Lit

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for DelimSpan

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for LazyAttrTokenStream

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for TokenStream

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#### type Extra = ()

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for AssocItem

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#### type Extra = AssocCtxt

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### impl<'a, V: Visitor<'a>> Visitable<'a, V> for ForeignItem

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#### type Extra = ()