pub struct MetaItemParser<'a> {
path: PathParser<'a>,
args: ArgParser<'a>,
}
Expand description
Utility that deconstructs a MetaItem into usable parts.
MetaItems are syntactically extremely flexible, but specific attributes want to parse them in custom, more restricted ways. This can be done using this struct.
MetaItems consist of some path, and some args. The args could be empty. In other words:
name
-> args are emptyname(...)
-> args are alist
, which is the bit between the parenthesesname = value
-> arg isname_value
, where the argument is the= value
part
The syntax of MetaItems can be found at https://doc.rust-lang.org/reference/attributes.html
Fields§
§path: PathParser<'a>
§args: ArgParser<'a>
Implementations§
Source§impl<'a> MetaItemParser<'a>
impl<'a> MetaItemParser<'a>
Sourcepub fn from_attr<'sess>(
attr: &'a NormalAttr,
dcx: DiagCtxtHandle<'sess>,
) -> Self
pub fn from_attr<'sess>( attr: &'a NormalAttr, dcx: DiagCtxtHandle<'sess>, ) -> Self
Create a new parser from a NormalAttr
, which is stored inside of any
ast::Attribute
Source§impl<'a> MetaItemParser<'a>
impl<'a> MetaItemParser<'a>
Trait Implementations§
Source§impl<'a> Clone for MetaItemParser<'a>
impl<'a> Clone for MetaItemParser<'a>
Source§fn clone(&self) -> MetaItemParser<'a>
fn clone(&self) -> MetaItemParser<'a>
Returns a duplicate of the value. Read more
1.0.0 · Source§const fn clone_from(&mut self, source: &Self)
const fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source
. Read moreAuto Trait Implementations§
impl<'a> DynSend for MetaItemParser<'a>
impl<'a> DynSync for MetaItemParser<'a>
impl<'a> Freeze for MetaItemParser<'a>
impl<'a> RefUnwindSafe for MetaItemParser<'a>
impl<'a> Send for MetaItemParser<'a>
impl<'a> Sync for MetaItemParser<'a>
impl<'a> Unpin for MetaItemParser<'a>
impl<'a> UnwindSafe for MetaItemParser<'a>
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
Source§impl<T> CloneToUninit for Twhere
T: Clone,
impl<T> CloneToUninit for Twhere
T: Clone,
Source§impl<T, R> CollectAndApply<T, R> for T
impl<T, R> CollectAndApply<T, R> for T
Source§impl<T> Filterable for T
impl<T> Filterable for T
Source§fn filterable(
self,
filter_name: &'static str,
) -> RequestFilterDataProvider<T, fn(DataRequest<'_>) -> bool>
fn filterable( self, filter_name: &'static str, ) -> RequestFilterDataProvider<T, fn(DataRequest<'_>) -> bool>
Creates a filterable data provider with the given name for debugging. Read more
Source§impl<T> Instrument for T
impl<T> Instrument for T
Source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
Source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
Source§impl<T> IntoEither for T
impl<T> IntoEither for T
Source§fn into_either(self, into_left: bool) -> Either<Self, Self>
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 moreSource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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 moreSource§impl<T> Pointable for T
impl<T> Pointable for T
Source§impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
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Source§impl<I, T> UpcastFrom<I, T> for T
impl<I, T> UpcastFrom<I, T> for T
fn upcast_from(from: T, _tcx: I) -> T
Source§impl<T> WithSubscriber for T
impl<T> WithSubscriber for T
Source§fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
Source§fn with_current_subscriber(self) -> WithDispatch<Self>
fn with_current_subscriber(self) -> WithDispatch<Self>
impl<T> ErasedDestructor for Twhere
T: 'static,
impl<T> MaybeSendSync for T
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: 80 bytes