"event" name support? (appending a suffix to the default target instead of replacing it entirely) about log HOT 5 CLOSED

You can use target for this. See the logging macros and Record.target. Example:

debug!(target: "load-game", "Loading game file: {:?}", game_file);

// In logging
let record: log::Record = // ..
println!("target: {}", record.target());

Note that it defaults to the module name.

Let me know if this does or doesn't work for you.

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@Thomasdezeeuw sorry, maybe I wasn't clear enough. The point of my post is that if I use target, and I want the module name to also be part of the target, I have to write ptrpi::storage::load-game, not just load-game.

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The point of my post is that if I use target, and I want the module name to also be part of the target, I have to write ptrpi::storage::load-game, not just load-game.

You could combine the module and target in you logging implementation.

Otherwise you can look at logging a separate key-value: https://docs.rs/log/latest/log/kv/index.html. It's officially still unstable, but it hasn't seen any breaking changes in months/years and it's close to stabilising (https://github.com/rust-lang/log/issues/4360).

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I think the kv log approach is probably my best bet, but I couldn't really figure out how to use it in the log crate. In the end I switched to tracing and am using this formulation:

debug!(event="load-snapshot", ?filename);

from log.

I think the kv log approach is probably my best bet, but I couldn't really figure out how to use it in the log crate. In the end I switched to tracing and am using this formulation:

debug!(event="load-snapshot", ?filename);

For reference you need to enable the kv feature(s), i.e. kv_unstable and likely kv_unstable_std (unless you don't use std), see

Then you can use the following:

log::debug!(event="load-snapshot", filename=log::as_debug!(filename));

When logging you can access event and filename in Record::key_values.

We're still discussing whether or not we want to support the ?filename notation as well.

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