# Data in syn - Rust
The storage of a struct, enum or union data structure.
Keywords: rust, rustlang, rust-lang, Data

# Enum syn::Data

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    pub enum Data {
        Struct(DataStruct),
        Enum(DataEnum),
        Union(DataUnion),
    }

Expand description

The storage of a struct, enum or union data structure.

This type is available only if Syn is built with the `"derive"` feature.

## Syntax tree enum

This type is a syntax tree enum.

## Variants

### `Struct(DataStruct)`

A struct input to a `proc_macro_derive` macro.

### `Enum(DataEnum)`

An enum input to a `proc_macro_derive` macro.

### `Union(DataUnion)`

An untagged union input to a `proc_macro_derive` macro.

## Trait Implementations

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### impl Clone for Data

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#### fn clone(&self) -> Self

Returns a copy of the value. Read more

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

Performs copy-assignment from `source`. Read more

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### impl From<DataEnum> for Data

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#### fn from(e: DataEnum) -> Data

Converts to this type from the input type.

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### impl From<DataStruct> for Data

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#### fn from(e: DataStruct) -> Data

Converts to this type from the input type.

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### impl From<DataUnion> for Data

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#### fn from(e: DataUnion) -> Data

Converts to this type from the input type.

## Auto Trait Implementations

### impl RefUnwindSafe for Data

### impl !Send for Data

### impl !Sync for Data

### impl Unpin for Data

### impl UnwindSafe for Data

## 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,

const: unstable · source

#### 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,

const: unstable · source

#### 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> ToOwned for T where
T: Clone,

#### type Owned = T

The resulting type after obtaining ownership.

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

Creates owned data from borrowed data, usually by cloning. Read more

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#### fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more

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

#### type Error = Infallible

The type returned in the event of a conversion error.

const: unstable · source

#### 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>,

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

The type returned in the event of a conversion error.

const: unstable · source

#### fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.