macro_rules! span { (target: $target:expr, parent: $parent:expr, $lvl:expr, $name:expr) => { ... }; (target: $target:expr, parent: $parent:expr, $lvl:expr, $name:expr, $($fields:tt)*) => { ... }; (target: $target:expr, $lvl:expr, $name:expr, $($fields:tt)*) => { ... }; (target: $target:expr, parent: $parent:expr, $lvl:expr, $name:expr) => { ... }; (parent: $parent:expr, $lvl:expr, $name:expr, $($fields:tt)*) => { ... }; (parent: $parent:expr, $lvl:expr, $name:expr) => { ... }; (target: $target:expr, $lvl:expr, $name:expr, $($fields:tt)*) => { ... }; (target: $target:expr, $lvl:expr, $name:expr) => { ... }; ($lvl:expr, $name:expr, $($fields:tt)*) => { ... }; ($lvl:expr, $name:expr) => { ... }; }
Expand description
Constructs a new span.
See the top-level documentation for details on the syntax accepted by this macro.
Examples
Creating a new span:
let span = span!(Level::TRACE, "my span");
let _enter = span.enter();
// do work inside the span...