Struct Inject 

pub struct Inject<T: ?Sized>(pub Arc<T>);

A wrapper around Arc<T> that can be extracted from a ResolveContext.

T may be unsized (dyn Trait) for trait-object injection set up with bind!(dyn Trait => Concrete). For sized concrete types the standard Extract impl applies; for dyn Trait the generated provider code uses ctx.resolve_external::<Arc<dyn Trait>>() directly (no Extract impl needed — and no orphan-rule violation).

Examples

// Concrete injectable type
pub struct UserService { db: Inject<Database> }

// Trait-object injection (set up with bind!)
pub struct NotificationService { mailer: Inject<dyn Mailer> }

// Axum handler destructuring pattern
async fn handler(Inject(svc): Inject<UserService>) -> impl IntoResponse { ... }

Tuple Fields

0: Arc<T>

Implementations

impl<T: ?Sized> Inject<T>

pub fn new(value: Arc<T>) -> Self

Create a new Inject from an Arc<T>.

pub fn into_inner(self) -> Arc<T>

Consume the wrapper and return the inner Arc<T>.

pub fn inner(&self) -> &Arc<T>

Borrow the inner Arc<T>.

pub fn arc(&self) -> Arc<T>

Clone the inner Arc<T>.

pub fn ptr_eq(&self, other: &Inject<T>) -> bool

Returns true if both Inject<T> values point to the same heap allocation.

Useful for asserting singleton semantics in tests without going through Arc::ptr_eq(a.inner(), b.inner()).

Trait Implementations

impl<T: ?Sized> AsRef<T> for Inject<T>

fn as_ref(&self) -> &T

Converts this type into a shared reference of the (usually inferred) input type.

impl<T: ?Sized> Borrow<T> for Inject<T>

fn borrow(&self) -> &T

Immutably borrows from an owned value.

impl<T: ?Sized> Clone for Inject<T>

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<T: ?Sized + Debug> Debug for Inject<T>

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

Formats the value using the given formatter.

impl<T: ?Sized> Deref for Inject<T>

type Target = T

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl<T: Eq> Eq for Inject<T>

impl<T: Sized + Send + Sync + 'static> Extract for Inject<T>

Extract implementation for Inject<T> where T: Sized + Send + Sync + 'static.

Resolution order:

1. Try resolve_external::<Arc<T>>() — finds InjectableArcFactory entries submitted by #[injectable] macros. These entries call resolve_singleton_arc internally, so singletons are properly cached.
2. Fall back to resolve_external::<T>() — finds DynProvider<T> registrations for external types, then wraps the result in Arc::new.

fn extract<'life0, 'async_trait>( ctx: &'life0 ResolveContext, ) -> Pin<Box<dyn Future<Output = InjectableResult<Self>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Extract a value from the given resolution context.

impl<T: ?Sized> From<Arc<T>> for Inject<T>

fn from(arc: Arc<T>) -> Self

Converts to this type from the input type.

impl<T: ?Sized> From<Inject<T>> for Arc<T>

fn from(inject: Inject<T>) -> Self

Converts to this type from the input type.

impl<T: Hash> Hash for Inject<T>

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

Feeds this value into the given Hasher.

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

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: PartialEq> PartialEq for Inject<T>

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

Equality operator ==.

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

Inequality operator !=.