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## ExprUseNode

# Enum ExprUseNode

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    pub enum ExprUseNode<'tcx> {
        LetStmt(&'tcx LetStmt<'tcx>),
        ConstStatic(OwnerId),
        Return(OwnerId),
        Field(&'tcx ExprField<'tcx>),
        FnArg(&'tcx Expr<'tcx>, usize),
        MethodArg(HirId, Option<&'tcx GenericArgs<'tcx>>, usize),
        Callee,
        FieldAccess(Ident),
        AddrOf(BorrowKind, Mutability),
        Other,
    }

Expand description

The node which consumes a value.

## Variants§

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### LetStmt(&'tcx LetStmt<'tcx>)

Assignment to, or initializer for, a local

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### ConstStatic(OwnerId)

Initializer for a const or static item.

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### Return(OwnerId)

Implicit or explicit return from a function.

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### Field(&'tcx ExprField<'tcx>)

Initialization of a struct field.

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### FnArg(&'tcx Expr<'tcx>, usize)

An argument to a function.

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### MethodArg(HirId, Option<&'tcx GenericArgs<'tcx>>, usize)

An argument to a method.

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### Callee

The callee of a function call.

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### FieldAccess(Ident)

Access of a field.

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### AddrOf(BorrowKind, Mutability)

Borrow expression.

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### Other

## Implementations§

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### impl<'tcx> ExprUseNode<'tcx>

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#### pub fn is_return(&self) -> bool

Checks if the value is returned from the function.

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#### pub fn is_recv(&self) -> bool

Checks if the value is used as a method call receiver.

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#### pub fn defined_ty(&self, cx: &LateContext<'tcx>) -> Option<DefinedTy<'tcx>>

Gets the needed type as it’s defined without any type inference.

## Auto Trait Implementations§

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### impl<'tcx> Freeze for ExprUseNode<'tcx>

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### impl<'tcx> RefUnwindSafe for ExprUseNode<'tcx>

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### impl<'tcx> Send for ExprUseNode<'tcx>

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### impl<'tcx> Sync for ExprUseNode<'tcx>

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### impl<'tcx> Unpin for ExprUseNode<'tcx>

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### impl<'tcx> UnsafeUnpin for ExprUseNode<'tcx>

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### impl<'tcx> UnwindSafe for ExprUseNode<'tcx>

## Blanket Implementations§

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

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#### fn type_id(&self) -> TypeId

Gets the `TypeId` of `self`. Read more
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### impl<T> Borrow<T> for T
where T: ?Sized,

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#### fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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### impl<T> BorrowMut<T> for T
where T: ?Sized,

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

Mutably borrows from an owned value. Read more
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### impl<T> From<T> for T

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#### fn from(t: T) -> T

Returns the argument unchanged.

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

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#### fn into(self) -> U

Calls `U::from(self)`.

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

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### impl<T> IntoEither for T

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#### fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left` is `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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#### fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts `self` into a `Left` variant of `Either<Self, Self>` if `into_left(&self)` returns `true`. Converts `self` into a `Right` variant of `Either<Self, Self>` otherwise. Read more
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### impl<T, U> TryFrom<U> for T
where U: Into<T>,

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#### type Error = Infallible

The type returned in the event of a conversion error.
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#### fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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### impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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

The type returned in the event of a conversion error.
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#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.

## 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: 24 bytes

Size for each variant:

- `LetStmt`: 16 bytes
- `ConstStatic`: 8 bytes
- `Return`: 8 bytes
- `Field`: 16 bytes
- `FnArg`: 24 bytes
- `MethodArg`: 24 bytes
- `Callee`: 0 bytes
- `FieldAccess`: 16 bytes
- `AddrOf`: 6 bytes
- `Other`: 0 bytes