[−][src]Enum syn::Meta

pub enum Meta {
    Word(Ident),
    List(MetaList),
    NameValue(MetaNameValue),
}

Content of a compile-time structured attribute.

This type is available if Syn is built with the "derive" or "full" feature.

Word

A meta word is like the test in #[test].

List

A meta list is like the derive(Copy) in #[derive(Copy)].

NameValue

A name-value meta is like the path = "..." in #[path = "sys/windows.rs"].

Syntax tree enum

This type is a syntax tree enum.

Variants

Word(Ident)List(MetaList)

A structured list within an attribute, like derive(Copy, Clone).

This type is available if Syn is built with the "derive" or "full" feature.

NameValue(MetaNameValue)

A name-value pair within an attribute, like feature = "nightly".

This type is available if Syn is built with the "derive" or "full" feature.

Methods

`impl Meta`
[src]

`pub fn name(&self) -> Ident`
[src]

Returns the identifier that begins this structured meta item.

For example this would return the test in #[test], the derive in #[derive(Copy)], and the path in #[path = "sys/windows.rs"].

Trait Implementations

`impl Debug for Meta`
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`fn fmt(&self, f: &mut Formatter) -> Result`
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Formats the value using the given formatter. Read more

`impl Eq for Meta`
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`impl PartialEq for Meta`
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`fn eq(&self, other: &Meta) -> bool`
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This method tests for self and other values to be equal, and is used by ==. Read more

`fn ne(&self, other: &Meta) -> bool`
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This method tests for !=.

`impl Hash for Meta`
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`fn hash<H: Hasher>(&self, state: &mut H)`
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Feeds this value into the given [Hasher]. Read more

`fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher,`
1.3.0
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Feeds a slice of this type into the given [Hasher]. Read more

`impl Clone for Meta`
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`fn clone(&self) -> Meta`
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Returns a copy of the value. Read more

`fn clone_from(&mut self, source: &Self)`
1.0.0
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Performs copy-assignment from source. Read more

`impl From<Ident> for Meta`
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`fn from(e: Ident) -> Meta`
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Performs the conversion.

`impl From<MetaList> for Meta`
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`fn from(e: MetaList) -> Meta`
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Performs the conversion.

`impl From<MetaNameValue> for Meta`
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`fn from(e: MetaNameValue) -> Meta`
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Performs the conversion.

`impl ToTokens for Meta`
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`fn to_tokens(&self, tokens: &mut TokenStream)`
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Write self to the given TokenStream. Read more

`fn into_token_stream(self) -> TokenStream`
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Convert self directly into a TokenStream object. Read more

`impl From<Meta> for NestedMeta`
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`fn from(e: Meta) -> NestedMeta`
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Performs the conversion.

Auto Trait Implementations

`impl !Send for Meta`

`impl !Sync for Meta`

Blanket Implementations

`impl<T> Spanned for T where T: ToTokens,`
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`fn span(&Self) -> Span`
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Returns a Span covering the complete contents of this syntax tree node, or [Span::call_site()] if this node is empty. Read more

`impl<T> From for T`
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`fn from(t: T) -> T`
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Performs the conversion.

`impl<T, U> Into for T where U: From<T>,`
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`fn into(self) -> U`
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Performs the conversion.

`impl<T> ToOwned for T where T: Clone,`
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`type Owned = T`

`fn to_owned(&self) -> T`
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Creates owned data from borrowed data, usually by cloning. Read more

`fn clone_into(&self, target: &mut T)`
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🔬 This is a nightly-only experimental API. (toowned_clone_into)

recently added

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

`impl<T, U> TryFrom for T where T: From,`
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`type Error = !`

🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

`fn try_from(value: U) -> Result<T, <T as TryFrom>::Error>`
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🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

`impl<T> Borrow for T where T: ?Sized,`
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ⓘImportant traits for &'a mut W
Important traits for &'a mut W
`impl<'a, W> Write for &'a mut W where W: Write + ?Sized, impl<'a, R> Read for &'a mut R where R: Read + ?Sized, impl<'a, I> Iterator for &'a mut I where I: Iterator + ?Sized, type Item = ::Item;`
`fn borrow(&self) -> &T`
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Immutably borrows from an owned value. Read more

`impl<T> BorrowMut for T where T: ?Sized,`
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ⓘImportant traits for &'a mut W
Important traits for &'a mut W
`impl<'a, W> Write for &'a mut W where W: Write + ?Sized, impl<'a, R> Read for &'a mut R where R: Read + ?Sized, impl<'a, I> Iterator for &'a mut I where I: Iterator + ?Sized, type Item = ::Item;`
`fn borrow_mut(&mut self) -> &mut T`
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Mutably borrows from an owned value. Read more

`impl<T, U> TryInto for T where U: TryFrom<T>,`
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`type Error = >::Error`

🔬 This is a nightly-only experimental API. (try_from)

The type returned in the event of a conversion error.

`fn try_into(self) -> Result<U, >::Error>`
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🔬 This is a nightly-only experimental API. (try_from)

Performs the conversion.

`impl<T> Any for T where T: 'static + ?Sized,`
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`fn get_type_id(&self) -> TypeId`
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🔬 This is a nightly-only experimental API. (get_type_id)

this method will likely be replaced by an associated static

Gets the TypeId of self. Read more

`impl<E> SpecializationError for E`
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`fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where T: ?Sized,`
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🔬 This is a nightly-only experimental API. (rustc_private)

this crate is being loaded from the sysroot, an unstable location; did you mean to load this crate from crates.io via Cargo.toml instead?

Create an error for a missing method specialization. Defaults to panicking with type, trait & method names. S is the encoder/decoder state type, T is the type being encoded/decoded, and the arguments are the names of the trait and method that should've been overridden. Read more

[−][src]Enum syn::Meta

Word

List

NameValue

Syntax tree enum

Variants

Methods

impl Meta[src]

pub fn name(&self) -> Ident[src]

Trait Implementations

impl Debug for Meta[src]

fn fmt(&self, f: &mut Formatter) -> Result[src]

impl Eq for Meta[src]

impl PartialEq for Meta[src]

fn eq(&self, other: &Meta) -> bool[src]

fn ne(&self, other: &Meta) -> bool[src]

impl Hash for Meta[src]

fn hash<__H: Hasher>(&self, state: &mut __H)[src]

fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher, 1.3.0[src]

impl Clone for Meta[src]

fn clone(&self) -> Meta[src]

fn clone_from(&mut self, source: &Self)1.0.0[src]

impl From<Ident> for Meta[src]

fn from(e: Ident) -> Meta[src]

impl From<MetaList> for Meta[src]

fn from(e: MetaList) -> Meta[src]

impl From<MetaNameValue> for Meta[src]

fn from(e: MetaNameValue) -> Meta[src]

impl ToTokens for Meta[src]

fn to_tokens(&self, tokens: &mut TokenStream)[src]

fn into_token_stream(self) -> TokenStream[src]

impl From<Meta> for NestedMeta[src]

fn from(e: Meta) -> NestedMeta[src]

Auto Trait Implementations

impl !Send for Meta

impl !Sync for Meta

Blanket Implementations

impl<T> Spanned for T where T: ToTokens, [src]

fn span(&Self) -> Span[src]

impl<T> From for T[src]

fn from(t: T) -> T[src]

impl<T, U> Into for T where U: From<T>, [src]

fn into(self) -> U[src]

impl<T> ToOwned for T where T: Clone, [src]

type Owned = T

fn to_owned(&self) -> T[src]

fn clone_into(&self, target: &mut T)[src]

impl<T, U> TryFrom for T where T: From<U>, [src]

type Error = !

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>[src]

impl<T> Borrow for T where T: ?Sized, [src]

ⓘImportant traits for &'a mut WImportant traits for &'a mut Wimpl<'a, W> Write for &'a mut W where W: Write + ?Sized, impl<'a, R> Read for &'a mut R where R: Read + ?Sized, impl<'a, I> Iterator for &'a mut I where I: Iterator + ?Sized, type Item = <I as Iterator>::Item;fn borrow(&self) -> &T[src]

Important traits for &'a mut W

impl<T> BorrowMut for T where T: ?Sized, [src]

Important traits for &'a mut W

impl<T, U> TryInto for T where U: TryFrom<T>, [src]

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

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

impl<T> Any for T where T: 'static + ?Sized, [src]

fn get_type_id(&self) -> TypeId[src]

impl<E> SpecializationError for E[src]

fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where T: ?Sized, [src]

impl<T> Erased for T[src]

impl<T> Send for T where T: ?Sized, [src]

impl<T> Sync for T where T: ?Sized, [src]

impl<T> Erased for T

`impl Meta`
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`pub fn name(&self) -> Ident`
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`impl Debug for Meta`
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`fn fmt(&self, f: &mut Formatter) -> Result`
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`impl Eq for Meta`
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`impl PartialEq for Meta`
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`fn eq(&self, other: &Meta) -> bool`
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`fn ne(&self, other: &Meta) -> bool`
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`impl Hash for Meta`
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`fn hash<H: Hasher>(&self, state: &mut H)`
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`fn hash_slice<H>(data: &[Self], state: &mut H) where H: Hasher,`
1.3.0
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`impl Clone for Meta`
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`fn clone(&self) -> Meta`
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`fn clone_from(&mut self, source: &Self)`
1.0.0
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`impl From<Ident> for Meta`
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`fn from(e: Ident) -> Meta`
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`impl From<MetaList> for Meta`
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`fn from(e: MetaList) -> Meta`
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`impl From<MetaNameValue> for Meta`
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`fn from(e: MetaNameValue) -> Meta`
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`impl ToTokens for Meta`
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`fn to_tokens(&self, tokens: &mut TokenStream)`
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`fn into_token_stream(self) -> TokenStream`
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`impl From<Meta> for NestedMeta`
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`fn from(e: Meta) -> NestedMeta`
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`impl !Send for Meta`

`impl !Sync for Meta`

`impl<T> Spanned for T where T: ToTokens,`
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`fn span(&Self) -> Span`
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`impl<T> From for T`
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`fn from(t: T) -> T`
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`impl<T, U> Into for T where U: From<T>,`
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`fn into(self) -> U`
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`impl<T> ToOwned for T where T: Clone,`
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`type Owned = T`

`fn to_owned(&self) -> T`
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`fn clone_into(&self, target: &mut T)`
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`impl<T, U> TryFrom for T where T: From<U>,`
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`type Error = !`

`fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>`
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`impl<T> Borrow for T where T: ?Sized,`
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`impl<T> BorrowMut for T where T: ?Sized,`
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`impl<T, U> TryInto for T where U: TryFrom<T>,`
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`type Error = <U as TryFrom<T>>::Error`

`fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>`
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`impl<T> Any for T where T: 'static + ?Sized,`
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`fn get_type_id(&self) -> TypeId`
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`impl<E> SpecializationError for E`
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`fn not_found<S, T>(trait_name: &'static str, method_name: &'static str) -> E where T: ?Sized,`
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`impl<T> Erased for T`
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`impl<T> Send for T where T: ?Sized,`
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`impl<T> Sync for T where T: ?Sized,`
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`impl<T> Erased for T`