spdlog-rs 0.5.3

Fast, highly configurable Rust logging crate, inspired by the C++ logging library spdlog
Documentation 
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// All log macros and common types are under `spdlog::prelude` module.
use spdlog::prelude::*;

fn main() {
    // Writes a log at "info" level, and this log will be processed by the global
    // default logger - It will be output to `stdout`.
    info!("program started");

    // They will be output to `stderr`.
    let file = "config.json";
    error!("failed to open file: {}", file);
    warn!("undetermined locale, defaults to `en_US.UTF-8`");

    // Level "trace" and "debug" will be ignored by default, you can modify the
    // level filter of the global default logger to enable all levels.
    let verbose = true;
    if verbose {
        spdlog::default_logger().set_level_filter(LevelFilter::All);
    }

    trace!("position x: {}, y: {}", 11.4, -5.14);
    // Or if you prefer structured logging.
    trace!("position", kv: { x = 11.4, y = -5.14 });
}