Crate saydbg 

saydbg

A lightweight crate for conditional debug printing.

• Prints only in debug builds (debug_assertions)
• Optional color, timestamps, and file logging
• Zero overhead in release builds

Features

• color: enable colorized output
• timestamp: include local timestamp in log prefix
• file: mirror output to saydbg.log

Example

use saydbg::{saydbg, saywarn, sayerr, saytrace, saylog};

fn main() {
    saydbg!("Connected to database");
    saywarn!("Missing optional config file");
    saytrace!("Query took {:?} ms", 5);
    sayerr!("User not found: {}", "admin");
    saylog!("Always visible log in both debug and release");
}

Macros

saydbg

Prints [debug] messages in debug builds.

sayerr

Prints [error] messages to stderr in debug builds.

saylog

Always-on log (prints in all builds, including release).

saytrace

Prints [trace] messages in debug builds (very low-level info).

saywarn

Prints [warn] messages in debug builds.

Functions

build_prefix

Internal helper: builds timestamp + colored prefix.

maybe_write_file

Writes a line to the log file if the file feature is enabled.