slog-try

Convenience macros for logging with an optional slog Logger.

Usage

Add slog and slog-try as a dependency in your Cargo.toml file.

[dependencies]
slog = "2.0.9"
slog-try = "0.1.0"

In main.rs or lib.rs

#[macro_use]
extern crate slog;
#[macro_use]
extern crate slog_try;

Then

#[derive(Default)]
struct HasOptLogger {
    logger: Option<Logger>,
}

let mut opt_logger: HasOptLogger = Default::default();
try_info!(opt_logger.logger, "You won't see me output.  The logger is None."; "opt" => "None");
try_info!(opt_logger.logger, #"imatag", "You won't see me output.  The logger is None."; "opt" => "None");

// Setup a `Logger`
let plain = slog_term::PlainSyncDecorator::new(::std::io::stdout());
let logger = Logger::root(slog_term::FullFormat::new(plain).build().fuse(), o!("surname" => "Lava"));
opt_logger.logger = Some(logger);
try_info!(opt_logger.logger, "You will see me output!"; "opt" => "Some");
try_info!(opt_logger.logger, #"imatag", "You will see me output!"; "opt" => "Some");