Macro tracing::span

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) => { ... };
}

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...