Struct rustc_expand::mbe::diagnostics::CollectTrackerAndEmitter
source · struct CollectTrackerAndEmitter<'a, 'cx, 'matcher> {
cx: &'a mut ExtCtxt<'cx>,
remaining_matcher: Option<&'matcher MatcherLoc>,
best_failure: Option<(Token, &'static str, MatcherLoc)>,
root_span: Span,
result: Option<Box<dyn MacResult + 'cx>>,
}
Expand description
The tracker used for the slow error path that collects useful info for diagnostics.
Fields§
§cx: &'a mut ExtCtxt<'cx>
§remaining_matcher: Option<&'matcher MatcherLoc>
§best_failure: Option<(Token, &'static str, MatcherLoc)>
Which arm’s failure should we report? (the one furthest along)
root_span: Span
§result: Option<Box<dyn MacResult + 'cx>>
Implementations§
Trait Implementations§
source§impl<'a, 'cx, 'matcher> Tracker<'matcher> for CollectTrackerAndEmitter<'a, 'cx, 'matcher>
impl<'a, 'cx, 'matcher> Tracker<'matcher> for CollectTrackerAndEmitter<'a, 'cx, 'matcher>
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>>
)
fn after_arm(
&mut self,
result: &ParseResult<FxHashMap<MacroRulesNormalizedIdent, NamedMatch>>
)
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
). Read moresource§fn description() -> &'static str
fn description() -> &'static str
For tracing.
fn recovery() -> Recovery
Auto Trait Implementations§
impl<'a, 'cx, 'matcher> !RefUnwindSafe for CollectTrackerAndEmitter<'a, 'cx, 'matcher>
impl<'a, 'cx, 'matcher> !Send for CollectTrackerAndEmitter<'a, 'cx, 'matcher>
impl<'a, 'cx, 'matcher> !Sync for CollectTrackerAndEmitter<'a, 'cx, 'matcher>
impl<'a, 'cx, 'matcher> Unpin for CollectTrackerAndEmitter<'a, 'cx, 'matcher>where
'cx: 'a,
impl<'a, 'cx, 'matcher> !UnwindSafe for CollectTrackerAndEmitter<'a, 'cx, 'matcher>
Blanket Implementations§
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: 120 bytes