Enum rustc_ast::ast::ItemKind

pub enum ItemKind {
    ExternCrate(Option<Symbol>),
    Use(UseTree),
    Static(Box<StaticItem>),
    Const(Box<ConstItem>),
    Fn(Box<Fn>),
    Mod(Safety, ModKind),
    ForeignMod(ForeignMod),
    GlobalAsm(Box<InlineAsm>),
    TyAlias(Box<TyAlias>),
    Enum(EnumDef, Generics),
    Struct(VariantData, Generics),
    Union(VariantData, Generics),
    Trait(Box<Trait>),
    TraitAlias(Generics, GenericBounds),
    Impl(Box<Impl>),
    MacCall(P<MacCall>),
    MacroDef(MacroDef),
    Delegation(Box<Delegation>),
    DelegationMac(Box<DelegationMac>),
}

Variants

ExternCrate(Option<Symbol>)

An extern crate item, with the optional original crate name if the crate was renamed.

E.g., extern crate foo or extern crate foo_bar as foo.

Use(UseTree)

A use declaration item (use).

E.g., use foo;, use foo::bar; or use foo::bar as FooBar;.

Static(Box<StaticItem>)

A static item (static).

E.g., static FOO: i32 = 42; or static FOO: &'static str = "bar";.

Const(Box<ConstItem>)

A constant item (const).

E.g., const FOO: i32 = 42;.

Fn(Box<Fn>)

A function declaration (fn).

E.g., fn foo(bar: usize) -> usize { .. }.

Mod(Safety, ModKind)

A module declaration (mod).

E.g., mod foo; or mod foo { .. }. unsafe keyword on modules is accepted syntactically for macro DSLs, but not semantically by Rust.

ForeignMod(ForeignMod)

An external module (extern).

E.g., extern {} or extern "C" {}.

GlobalAsm(Box<InlineAsm>)

Module-level inline assembly (from global_asm!()).

TyAlias(Box<TyAlias>)

A type alias (type).

E.g., type Foo = Bar<u8>;.

Enum(EnumDef, Generics)

An enum definition (enum).

E.g., enum Foo<A, B> { C<A>, D<B> }.

Struct(VariantData, Generics)

A struct definition (struct).

E.g., struct Foo<A> { x: A }.

Union(VariantData, Generics)

A union definition (union).

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

Trait(Box<Trait>)

A trait declaration (trait).

E.g., trait Foo { .. }, trait Foo<T> { .. } or auto trait Foo {}.

TraitAlias(Generics, GenericBounds)

Trait alias.

E.g., trait Foo = Bar + Quux;.

Impl(Box<Impl>)

An implementation.

E.g., impl<A> Foo<A> { .. } or impl<A> Trait for Foo<A> { .. }.

MacCall(P<MacCall>)

A macro invocation.

E.g., foo!(..).

MacroDef(MacroDef)

A macro definition.

Delegation(Box<Delegation>)

A single delegation item (reuse).

E.g. reuse <Type as Trait>::name { target_expr_template }.

DelegationMac(Box<DelegationMac>)

A list or glob delegation item (reuse prefix::{a, b, c}, reuse prefix::*). Treated similarly to a macro call and expanded early.

Implementations

impl ItemKind

pub fn article(&self) -> &'static str

“a” or “an”

pub fn descr(&self) -> &'static str

pub fn generics(&self) -> Option<&Generics>

Trait Implementations

impl Clone for ItemKind

fn clone(&self) -> ItemKind

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ItemKind

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

Formats the value using the given formatter.

impl<__D: SpanDecoder> Decodable<__D> for ItemKind

fn decode(__decoder: &mut __D) -> Self

impl<__E: SpanEncoder> Encodable<__E> for ItemKind

fn encode(&self, __encoder: &mut __E)

impl From<AssocItemKind> for ItemKind

fn from(assoc_item_kind: AssocItemKind) -> ItemKind

Converts to this type from the input type.

impl From<ForeignItemKind> for ItemKind

fn from(foreign_item_kind: ForeignItemKind) -> ItemKind

Converts to this type from the input type.

impl TryFrom<ItemKind> for AssocItemKind

type Error = ItemKind

The type returned in the event of a conversion error.

fn try_from(item_kind: ItemKind) -> Result<AssocItemKind, ItemKind>

Performs the conversion.

impl TryFrom<ItemKind> for ForeignItemKind

type Error = ItemKind

The type returned in the event of a conversion error.

fn try_from(item_kind: ItemKind) -> Result<ForeignItemKind, ItemKind>

Performs the conversion.

impl WalkItemKind for ItemKind

fn walk(&mut self, span: Span, id: NodeId, vis: &mut impl MutVisitor)

impl WalkItemKind for ItemKind

fn walk<'a, V: Visitor<'a>>( &'a self, item: &'a Item<Self>, _ctxt: AssocCtxt, visitor: &mut V, ) -> V::Result

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 64 bytes

Size for each variant:

• ExternCrate: 12 bytes
• Use: 64 bytes
• Static: 16 bytes
• Const: 16 bytes
• Fn: 16 bytes
• Mod: 56 bytes
• ForeignMod: 56 bytes
• GlobalAsm: 16 bytes
• TyAlias: 16 bytes
• Enum: 56 bytes
• Struct: 64 bytes
• Union: 64 bytes
• Trait: 16 bytes
• TraitAlias: 64 bytes
• Impl: 16 bytes
• MacCall: 16 bytes
• MacroDef: 24 bytes
• Delegation: 16 bytes
• DelegationMac: 16 bytes