Dbg macro

The dbg! macro introduced in version 1.32 is pretty much a println! made for debugging.

An example from the official docs page

let a = 2;
let b = dbg!(a * 2) + 1;
//      ^-- prints: [src/main.rs:2:9] a * 2 = 4
assert_eq!(b, 5);

Notice that the file path and line numbers are printed. This metadata is generated at compile time, so it will keep up with changes made in your program.

This means it is less essential to make your dbg statements unique.

However, there are still some disadvantages (same as println!)

• Typing or more likely copying and pasting dbg!'s everywhere gets quite tedious
• At some point these dbg!'s need to removed or they will block up the logging