Logger

Structured logging with levels, colors, and flexible output

Basic Logging

Log messages with different severity levels

Basic Logger Example

use zfish::log::{Logger, Level};

let logger = Logger::new();

logger.info("Application started");
logger.warn("This is a warning");
logger.error("An error occurred");
logger.debug("Debug information");
logger.trace("Trace message");

Output

[INFO] Application started\n[WARN] This is a warning\n[ERROR] An error occurred\n[DEBUG] Debug information\n[TRACE] Trace message

Custom Log Levels

Set minimum log level to filter messages

Log Level Example

use zfish::log::{Logger, Level};

// Set log level using builder pattern
let logger = Logger::new().level(Level::Warn);

// These will be shown
logger.error("Error message");
logger.warn("Warning message");

// These will be hidden (below Warn level)
logger.info("Info message");
logger.debug("Debug message");

Output

[ERROR] Error message\n[WARN] Warning message

Formatted Logging

Use format strings in log messages

Formatted Logging

use zfish::log::Logger;

let logger = Logger::new();
let user = "Alice";
let count = 42;

logger.info(&format!("User {} logged in", user));
logger.debug(&format!("Processing {} items", count));
logger.error(&format!("Failed to process item {}", count));

Output

[INFO] User Alice logged in\n[DEBUG] Processing 42 items\n[ERROR] Failed to process item 42