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Add an example of Trace instance for IO #1108

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merged 4 commits into from
Dec 17, 2024
Merged

Add an example of Trace instance for IO #1108

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73d89ce
Add an example of Trace instance for IO
mwz Dec 16, 2024
93a48fb
Add an EntryPoint example
mwz Dec 16, 2024
0790449
Add an EntryPoint example
mwz Dec 16, 2024
112a103
Prefer constructing Trace from EntryPoint
mwz Dec 17, 2024
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9 changes: 8 additions & 1 deletion modules/docs/src/main/paradox/reference/trace.md
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Expand Up @@ -84,4 +84,11 @@ This is more general than the `Kleisli` instance above and allows you to instant

Given a `Span[F]` you can construct a `Trace[IO]` for **Cats-Effect 3** (for Cats-Effect 2 you will need to use `Kleisli` or `Local` above). This uses `FiberLocal` to pass the span around.

TODO: Example
```scala mdoc
import cats.effect.IO

def goIO(span: Span[IO]): IO[Unit] =
Trace.ioTrace(span).flatMap { implicit trace =>
wibble[IO]("bob", 42)
}
```
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