Enum syn::Item

source · [−]

pub enum Item {
Show 17 variants
    Const(ItemConst),
    Enum(ItemEnum),
    ExternCrate(ItemExternCrate),
    Fn(ItemFn),
    ForeignMod(ItemForeignMod),
    Impl(ItemImpl),
    Macro(ItemMacro),
    Macro2(ItemMacro2),
    Mod(ItemMod),
    Static(ItemStatic),
    Struct(ItemStruct),
    Trait(ItemTrait),
    TraitAlias(ItemTraitAlias),
    Type(ItemType),
    Union(ItemUnion),
    Use(ItemUse),
    Verbatim(TokenStream),
    // some variants omitted
}

Expand description

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

This type is available only if Syn is built with the "full" feature.

Syntax tree enum

This type is a syntax tree enum.

Variants

`Const(ItemConst)`

A constant item: const MAX: u16 = 65535.

`Enum(ItemEnum)`

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

`ExternCrate(ItemExternCrate)`

An extern crate item: extern crate serde.

`Fn(ItemFn)`

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

`ForeignMod(ItemForeignMod)`

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

`Impl(ItemImpl)`

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

`Macro(ItemMacro)`

A macro invocation, which includes macro_rules! definitions.

`Macro2(ItemMacro2)`

A 2.0-style declarative macro introduced by the macro keyword.

`Mod(ItemMod)`

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

`Static(ItemStatic)`

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

`Struct(ItemStruct)`

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

`Trait(ItemTrait)`

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

`TraitAlias(ItemTraitAlias)`

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

`Type(ItemType)`

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

`Union(ItemUnion)`

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

`Use(ItemUse)`

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

`Verbatim(TokenStream)`

Tokens forming an item not interpreted by Syn.

Trait Implementations

impl Clone for Item

fn clone(&self) -> Self

Returns a copy of the value. Read more

1.0.0 · source

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

impl Debug for Item

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

Formats the value using the given formatter. Read more

impl From<DeriveInput> for Item

fn from(input: DeriveInput) -> Item

Performs the conversion.

impl From<ItemConst> for Item

fn from(e: ItemConst) -> Item

Performs the conversion.

impl From<ItemEnum> for Item

fn from(e: ItemEnum) -> Item

Performs the conversion.

impl From<ItemExternCrate> for Item

fn from(e: ItemExternCrate) -> Item

Performs the conversion.

impl From<ItemFn> for Item

fn from(e: ItemFn) -> Item

Performs the conversion.

impl From<ItemForeignMod> for Item

fn from(e: ItemForeignMod) -> Item

Performs the conversion.

impl From<ItemImpl> for Item

fn from(e: ItemImpl) -> Item

Performs the conversion.

impl From<ItemMacro> for Item

fn from(e: ItemMacro) -> Item

Performs the conversion.

impl From<ItemMacro2> for Item

fn from(e: ItemMacro2) -> Item

Performs the conversion.

impl From<ItemMod> for Item

fn from(e: ItemMod) -> Item

Performs the conversion.

impl From<ItemStatic> for Item

fn from(e: ItemStatic) -> Item

Performs the conversion.

impl From<ItemStruct> for Item

fn from(e: ItemStruct) -> Item

Performs the conversion.

impl From<ItemTrait> for Item

fn from(e: ItemTrait) -> Item

Performs the conversion.

impl From<ItemTraitAlias> for Item

fn from(e: ItemTraitAlias) -> Item

Performs the conversion.

impl From<ItemType> for Item

fn from(e: ItemType) -> Item

Performs the conversion.

impl From<ItemUnion> for Item

fn from(e: ItemUnion) -> Item

Performs the conversion.

impl From<ItemUse> for Item

fn from(e: ItemUse) -> Item

Performs the conversion.

impl Hash for Item

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

Feeds this value into the given Hasher. Read more

1.3.0 · source

fn hash_slice<H>(data: &[Self], state: &mut H) where
H: Hasher,

Feeds a slice of this type into the given Hasher. Read more

impl Parse for Item

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

impl PartialEq<Item> for Item

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

This method tests for self and other values to be equal, and is used by ==. Read more

1.0.0 · source

fn ne(&self, other: &Rhs) -> bool

This method tests for !=.

impl ToTokens for Item

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

Write self to the given TokenStream. Read more

fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object. Read more

fn into_token_stream(self) -> TokenStream

Convert self directly into a TokenStream object. Read more

impl Eq for Item

Auto Trait Implementations

impl RefUnwindSafe for Item

impl !Send for Item

impl !Sync for Item

impl Unpin for Item

impl UnwindSafe for Item

Blanket Implementations

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

pub fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

impl<T> Borrow<T> for T where
T: ?Sized,

const: unstable · source

pub fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more

impl<T> BorrowMut<T> for T where
T: ?Sized,

const: unstable · source

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

Mutably borrows from an owned value. Read more

impl<T> From<T> for T

const: unstable · source

pub fn from(t: T) -> T

Returns the argument unchanged.

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

const: unstable · source

pub fn into(self) -> U

Calls U::from(self).

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

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

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. Read more

impl<T> ToOwned for T where
T: Clone,

type Owned = T

The resulting type after obtaining ownership.

pub fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more

pub fn clone_into(&self, target: &mut T)

🔬 This is a nightly-only experimental API. (toowned_clone_into)

Uses borrowed data to replace owned data, usually by cloning. Read more

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

type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.

impl<T, U> TryInto<U> for T where
U: TryFrom<T>,

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

The type returned in the event of a conversion error.

const: unstable · source

pub fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.