Enum syn::Meta[][src]

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

Content of a compile-time structured attribute.

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

Path

A meta path 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

Path(Path)
List(MetaList)

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

NameValue(MetaNameValue)

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

Implementations

impl Meta[src]

pub fn path(&self) -> &Path[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 Clone for Meta[src]

impl Debug for Meta[src]

impl Eq for Meta[src]

impl From<Meta> for NestedMeta[src]

impl From<MetaList> for Meta[src]

impl From<MetaNameValue> for Meta[src]

impl From<Path> for Meta[src]

impl Hash for Meta[src]

impl Parse for Meta[src]

impl PartialEq<Meta> for Meta[src]

impl ToTokens for Meta[src]

Auto Trait Implementations

impl RefUnwindSafe for Meta

impl !Send for Meta

impl !Sync for Meta

impl Unpin for Meta

impl UnwindSafe for Meta

Blanket Implementations

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

impl<T, U> Into<U> for T where
    U: From<T>, 
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impl<T> Spanned for T where
    T: Spanned + ?Sized
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impl<T> ToOwned for T where
    T: Clone
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type Owned = T

The resulting type after obtaining ownership.

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.

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.