Enum syn::Item

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#[non_exhaustive]
pub enum Item {
Show 16 variants Const(ItemConst), Enum(ItemEnum), ExternCrate(ItemExternCrate), Fn(ItemFn), ForeignMod(ItemForeignMod), Impl(ItemImpl), Macro(ItemMacro), Mod(ItemMod), Static(ItemStatic), Struct(ItemStruct), Trait(ItemTrait), TraitAlias(ItemTraitAlias), Type(ItemType), Union(ItemUnion), Use(ItemUse), Verbatim(TokenStream),
}
Expand description

Things that can appear directly inside of a module or scope.

Syntax tree enum

This type is a syntax tree enum.

Variants (Non-exhaustive)§

This enum is marked as non-exhaustive
Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.
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Const(ItemConst)

A constant item: const MAX: u16 = 65535.

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Enum(ItemEnum)

An enum definition: enum Foo<A, B> { A(A), B(B) }.

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ExternCrate(ItemExternCrate)

An extern crate item: extern crate serde.

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Fn(ItemFn)

A free-standing function: fn process(n: usize) -> Result<()> { ... }.

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ForeignMod(ItemForeignMod)

A block of foreign items: extern "C" { ... }.

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Impl(ItemImpl)

An impl block providing trait or associated items: impl<A> Trait for Data<A> { ... }.

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Macro(ItemMacro)

A macro invocation, which includes macro_rules! definitions.

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Mod(ItemMod)

A module or module declaration: mod m or mod m { ... }.

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Static(ItemStatic)

A static item: static BIKE: Shed = Shed(42).

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Struct(ItemStruct)

A struct definition: struct Foo<A> { x: A }.

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Trait(ItemTrait)

A trait definition: pub trait Iterator { ... }.

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TraitAlias(ItemTraitAlias)

A trait alias: pub trait SharableIterator = Iterator + Sync.

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Type(ItemType)

A type alias: type Result<T> = std::result::Result<T, MyError>.

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Union(ItemUnion)

A union definition: union Foo<A, B> { x: A, y: B }.

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Use(ItemUse)

A use declaration: use std::collections::HashMap.

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Verbatim(TokenStream)

Tokens forming an item not interpreted by Syn.

Trait Implementations§

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impl Clone for Item

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Item

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fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl From<DeriveInput> for Item

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fn from(input: DeriveInput) -> Item

Converts to this type from the input type.
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impl From<ItemConst> for Item

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fn from(e: ItemConst) -> Item

Converts to this type from the input type.
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impl From<ItemEnum> for Item

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fn from(e: ItemEnum) -> Item

Converts to this type from the input type.
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impl From<ItemExternCrate> for Item

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fn from(e: ItemExternCrate) -> Item

Converts to this type from the input type.
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impl From<ItemFn> for Item

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fn from(e: ItemFn) -> Item

Converts to this type from the input type.
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impl From<ItemForeignMod> for Item

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fn from(e: ItemForeignMod) -> Item

Converts to this type from the input type.
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impl From<ItemImpl> for Item

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fn from(e: ItemImpl) -> Item

Converts to this type from the input type.
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impl From<ItemMacro> for Item

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fn from(e: ItemMacro) -> Item

Converts to this type from the input type.
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impl From<ItemMod> for Item

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fn from(e: ItemMod) -> Item

Converts to this type from the input type.
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impl From<ItemStatic> for Item

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fn from(e: ItemStatic) -> Item

Converts to this type from the input type.
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impl From<ItemStruct> for Item

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fn from(e: ItemStruct) -> Item

Converts to this type from the input type.
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impl From<ItemTrait> for Item

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fn from(e: ItemTrait) -> Item

Converts to this type from the input type.
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impl From<ItemTraitAlias> for Item

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fn from(e: ItemTraitAlias) -> Item

Converts to this type from the input type.
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impl From<ItemType> for Item

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fn from(e: ItemType) -> Item

Converts to this type from the input type.
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impl From<ItemUnion> for Item

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fn from(e: ItemUnion) -> Item

Converts to this type from the input type.
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impl From<ItemUse> for Item

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fn from(e: ItemUse) -> Item

Converts to this type from the input type.
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impl Hash for Item

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fn hash<H>(&self, state: &mut H)
where H: Hasher,

Feeds this value into the given Hasher. Read more
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fn hash_slice<H>(data: &[Self], state: &mut H)
where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher. Read more
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impl Parse for Item

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fn parse(input: ParseStream<'_>) -> Result<Self>

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impl PartialEq for Item

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fn eq(&self, other: &Self) -> bool

This method tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl ToTokens for Item

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fn to_tokens(&self, tokens: &mut TokenStream)

Write self to the given TokenStream. Read more
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fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object. Read more
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fn into_token_stream(self) -> TokenStream
where Self: Sized,

Convert self directly into a TokenStream object. Read more
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impl Eq for Item

Auto Trait Implementations§

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impl RefUnwindSafe for Item

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impl !Send for Item

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impl !Sync for Item

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impl Unpin for Item

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impl UnwindSafe for Item

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Spanned for T
where T: Spanned + ?Sized,

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fn span(&self) -> Span

Returns a Span covering the complete contents of this syntax tree node, or Span::call_site() if this node is empty.
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.