Enum rustc_resolve::imports::ImportKind

pub(crate) enum ImportKind<'a> {
    Single {
        source: Ident,
        target: Ident,
        source_bindings: PerNS<Cell<Result<Interned<'a, NameBindingData<'a>>, Determinacy>>>,
        target_bindings: PerNS<Cell<Option<Interned<'a, NameBindingData<'a>>>>>,
        type_ns_only: bool,
        nested: bool,
        id: NodeId,
    },
    Glob {
        is_prelude: bool,
        max_vis: Cell<Option<Visibility>>,
        id: NodeId,
    },
    ExternCrate {
        source: Option<Symbol>,
        target: Ident,
        id: NodeId,
    },
    MacroUse,
    MacroExport,
}

Contains data for specific kinds of imports.

Variants

Single

Fields

source: Ident

source in use prefix::source as target.

target: Ident

target in use prefix::source as target.

source_bindings: PerNS<Cell<Result<Interned<'a, NameBindingData<'a>>, Determinacy>>>

Bindings to which source refers to.

target_bindings: PerNS<Cell<Option<Interned<'a, NameBindingData<'a>>>>>

Bindings introduced by target.

type_ns_only: bool

true for ...::{self [as target]} imports, false otherwise.

nested: bool

Did this import result from a nested import? ie. use foo::{bar, baz};

id: NodeId

The ID of the UseTree that imported this Import.

In the case where the Import was expanded from a “nested” use tree, this id is the ID of the leaf tree. For example:

use foo::bar::{a, b}

If this is the import for foo::bar::a, we would have the ID of the UseTree for a in this field.

Glob

Fields

is_prelude: bool

max_vis: Cell<Option<Visibility>>

id: NodeId

ExternCrate

Fields

source: Option<Symbol>

target: Ident

id: NodeId

MacroUse

MacroExport

Trait Implementations

impl<'a> Clone for ImportKind<'a>

fn clone(&self) -> ImportKind<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Debug for ImportKind<'a>

Manually implement Debug for ImportKind because the source/target_bindings contain Cells which can introduce infinite loops while printing.

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

Formats the value using the given formatter.

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: 104 bytes

Size for each variant:

• Single: 103 bytes
• Glob: 11 bytes
• ExternCrate: 23 bytes
• MacroUse: 0 bytes
• MacroExport: 0 bytes