Trait rustc_span::profiling::SpannedEventArgRecorder

pub trait SpannedEventArgRecorder {
    // Required method
    fn record_arg_with_span<A>(
        &mut self,
        source_map: &SourceMap,
        event_arg: A,
        span: Span
    )
       where A: Borrow<str> + Into<String>;
}

Extension trait for self-profiling purposes: allows to record spans within a generic activity’s event arguments.

Required Methods

fn record_arg_with_span<A>( &mut self, source_map: &SourceMap, event_arg: A, span: Span )where A: Borrow<str> + Into<String>,

Records the following event arguments within the current generic activity being profiled:

• the provided event_arg
• a string representation of the provided span

Note: when self-profiling with costly event arguments, at least one argument needs to be recorded. A panic will be triggered if that doesn’t happen.

Implementations on Foreign Types

impl SpannedEventArgRecorder for EventArgRecorder<'_>

fn record_arg_with_span<A>( &mut self, source_map: &SourceMap, event_arg: A, span: Span )where A: Borrow<str> + Into<String>,

Implementors