Enum syn::Meta
[−]
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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
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pub fn name(&self) -> Ident
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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, __arg_0: &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, __arg_0: &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, __arg_0: &Meta) -> bool
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This method tests for !=
.
impl Hash for Meta
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fn hash<__H: Hasher>(&self, __arg_0: &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[src]
H: Hasher,
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[src]
Performs copy-assignment from source
. Read more
impl From<Ident> for Meta
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impl From<MetaList> for Meta
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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.