syntax::span_help!
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macro_rules! span_help { ($session:expr, $span:expr, $($message:tt)*) => ({ ($session).span_help($span, format!($($message)*).as_slice()) }) }
macro_rules! span_help { ($session:expr, $span:expr, $($message:tt)*) => ({ ($session).span_help($span, format!($($message)*).as_slice()) }) }
Prefix searches with a type followed by a colon (e.g.
fn:) to restrict the search to a given type.
Accepted types are: fn, mod,
struct, enum,
trait, typedef (or
tdef).