Add example for logging

rclrust/examples/logger.rs

@@ -0,0 +1,22 @@
+use anyhow::Result;
+use rclrust::{rclrust_debug, rclrust_error, rclrust_fatal, rclrust_info, rclrust_warn};
+use rclrust::{Clock, Logger};
+use rclrust_msg::geometry_msgs::msg::Twist;
+
+fn main() -> Result<()> {
+    let _ctx = rclrust::init()?;
+
+    let logger = Logger::new("log example");
+
+    rclrust_debug!(logger, "debug log: {}", 20);
+    rclrust_info!(logger, "info log: {:?}", Twist::default());
+    rclrust_warn!(logger, "warn log: {} {} {}", 20.3, 20, true);
+    rclrust_error!(
+        logger,
+        "error log: {:?}",
+        Clock::ros().unwrap().now().unwrap()
+    );
+    rclrust_fatal!(logger, "fatal log: plain message");
+
+    Ok(())
+}

rclrust/src/lib.rs

@@ -30,6 +30,7 @@ pub use clock::{Clock, ClockType};
 pub use context::Context;
 pub use executor::{spin, spin_some};
 pub use init_options::InitOptions;
+pub use log::Logger;
 pub use node_options::NodeOptions;
 pub use parameter::{Parameter, ParameterType, ParameterValue};
 pub use time::Time;