pub enum ItemKind<'hir> {
Show 17 variants ExternCrate(Option<Symbol>), Use(&'hir Path<'hir>, UseKind), Static(&'hir Ty<'hir>, MutabilityBodyId), Const(&'hir Ty<'hir>, BodyId), Fn(FnSig<'hir>, &'hir Generics<'hir>, BodyId), Macro(MacroDefMacroKind), Mod(&'hir Mod<'hir>), ForeignMod { abi: Abi, items: &'hir [ForeignItemRef], }, GlobalAsm(&'hir InlineAsm<'hir>), TyAlias(&'hir Ty<'hir>, &'hir Generics<'hir>), OpaqueTy(OpaqueTy<'hir>), Enum(EnumDef<'hir>, &'hir Generics<'hir>), Struct(VariantData<'hir>, &'hir Generics<'hir>), Union(VariantData<'hir>, &'hir Generics<'hir>), Trait(IsAutoUnsafety, &'hir Generics<'hir>, GenericBounds<'hir>, &'hir [TraitItemRef]), TraitAlias(&'hir Generics<'hir>, GenericBounds<'hir>), Impl(&'hir Impl<'hir>),



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

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

Use(&'hir Path<'hir>, UseKind)

use foo::bar::*; or use foo::bar::baz as quux;

or just

use foo::bar::baz; (with as baz implicitly on the right).

Static(&'hir Ty<'hir>, MutabilityBodyId)

A static item.

Const(&'hir Ty<'hir>, BodyId)

A const item.

Fn(FnSig<'hir>, &'hir Generics<'hir>, BodyId)

A function declaration.


A MBE macro definition (macro_rules! or macro).

Mod(&'hir Mod<'hir>)

A module.



abi: Abi
items: &'hir [ForeignItemRef]

An external module, e.g. extern { .. }.

GlobalAsm(&'hir InlineAsm<'hir>)

Module-level inline assembly (from global_asm!).

TyAlias(&'hir Ty<'hir>, &'hir Generics<'hir>)

A type alias, e.g., type Foo = Bar<u8>.


An opaque impl Trait type alias, e.g., type Foo = impl Bar;.

Enum(EnumDef<'hir>, &'hir Generics<'hir>)

An enum definition, e.g., enum Foo<A, B> {C<A>, D<B>}.

Struct(VariantData<'hir>, &'hir Generics<'hir>)

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

Union(VariantData<'hir>, &'hir Generics<'hir>)

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

Trait(IsAutoUnsafety, &'hir Generics<'hir>, GenericBounds<'hir>, &'hir [TraitItemRef])

A trait definition.

TraitAlias(&'hir Generics<'hir>, GenericBounds<'hir>)

A trait alias.

Impl(&'hir Impl<'hir>)

An implementation, e.g., impl<A> Trait for Foo { .. }.


Trait Implementations

Formats the value using the given formatter. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more
Immutably borrows from an owned value. Read more
Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

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

The type returned in the event of a conversion error.
Performs the conversion.
The type returned in the event of a conversion error.
Performs the conversion.


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: 48 bytes

Size for each variant:

  • ExternCrate: 7 bytes
  • Use: 15 bytes
  • Static: 23 bytes
  • Const: 23 bytes
  • Fn: 47 bytes
  • Macro: 23 bytes
  • Mod: 15 bytes
  • ForeignMod: 23 bytes
  • GlobalAsm: 15 bytes
  • TyAlias: 23 bytes
  • OpaqueTy: 47 bytes
  • Enum: 31 bytes
  • Struct: 47 bytes
  • Union: 47 bytes
  • Trait: 47 bytes
  • TraitAlias: 31 bytes
  • Impl: 15 bytes