Struct rustc_expand::mbe::diagnostics::FailureForwarder
source · pub(crate) struct FailureForwarder<'matcher> {
expected_token: Option<&'matcher Token>,
}
Expand description
Currently used by macro_rules! compilation to extract a little information from the Failure
case.
Fields§
§expected_token: Option<&'matcher Token>
Implementations§
source§impl<'matcher> FailureForwarder<'matcher>
impl<'matcher> FailureForwarder<'matcher>
Trait Implementations§
source§impl<'matcher> Tracker<'matcher> for FailureForwarder<'matcher>
impl<'matcher> Tracker<'matcher> for FailureForwarder<'matcher>
source§fn build_failure(tok: Token, position: u32, msg: &'static str) -> Self::Failure
fn build_failure(tok: Token, position: u32, msg: &'static str) -> Self::Failure
Arm failed to match. If the token is
token::Eof
, it indicates an unexpected
end of macro invocation. Otherwise, it indicates that no rules expected the given token.
The usize is the approximate position of the token in the input token stream.source§fn description() -> &'static str
fn description() -> &'static str
For tracing.
fn set_expected_token(&mut self, tok: &'matcher Token)
fn get_expected_token(&self) -> Option<&'matcher Token>
source§fn before_match_loc(
&mut self,
_parser: &TtParser,
_matcher: &'matcher MatcherLoc,
)
fn before_match_loc( &mut self, _parser: &TtParser, _matcher: &'matcher MatcherLoc, )
This is called before trying to match next MatcherLoc on the current token.
source§fn after_arm(
&mut self,
_result: &ParseResult<FxHashMap<MacroRulesNormalizedIdent, NamedMatch>, Self::Failure>,
)
fn after_arm( &mut self, _result: &ParseResult<FxHashMap<MacroRulesNormalizedIdent, NamedMatch>, Self::Failure>, )
This is called after an arm has been parsed, either successfully or unsuccessfully. When
this is called,
before_match_loc
was called at least once (with a MatcherLoc::Eof
).fn recovery() -> Recovery
Auto Trait Implementations§
impl<'matcher> Freeze for FailureForwarder<'matcher>
impl<'matcher> !RefUnwindSafe for FailureForwarder<'matcher>
impl<'matcher> !Send for FailureForwarder<'matcher>
impl<'matcher> !Sync for FailureForwarder<'matcher>
impl<'matcher> Unpin for FailureForwarder<'matcher>
impl<'matcher> !UnwindSafe for FailureForwarder<'matcher>
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, 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<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
impl<I, T, U> Upcast<I, U> for Twhere
U: UpcastFrom<I, T>,
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<'a, T> Captures<'a> for Twhere
T: ?Sized,
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: 8 bytes