The design of kV is not concise enough, I have a simple suggestion.

[jmjoy]

Just give as_*! add a grammar sugar. For example:

warn!(err = as_error!(err); "Unable to locate a razor, retrying");

also can be written:

warn!(error(err); "Unable to locate a razor, retrying");

For as_debug, as_display and others:

warn!(debug(err); "Unable to locate a razor, retrying");
warn!(display(err); "Unable to locate a razor, retrying");

[Thomasdezeeuw]

We're considering copying the shorthand of the tracing crate, starting roughly here: #328 (comment). For example log::as_display(value) would be written as ?value. Would something like that work for you?

[jmjoy]

We're considering copying the shorthand of the tracing crate, starting roughly here: #328 (comment). For example log::as_display(value) would be written as ?value. Would something like that work for you?

Very good, thank you. I just saw that the log has a lot of formatting macros, such as serde and sval.