p-macro

Tired of typing {:?}? This crate defines a macro p!() shorter to type than println!(), for your debugging needs.

Usage

Add this to your Cargo.toml:

[dependencies]
p-macro = "*"

And use like this:

#[macro_use] extern crate p_macro;

fn main() {
	let x = 5;
	let y = 2;
    p!(x + y); // same as println!("x + y = {:?}", x + y);
	p!(x, y); // same as println!("x = {:?}, y = {:?}", x, y);
	p!(); // same as println!("");
}

It does other things too. With a colon you disable printing the source code snippet:

p!(:10, :"a"); // same as println!("{:?} {:?}", 10, "a");

It accepts multiple lines too:

let (a, b, c) = (1, 2, 3);

p! {
    a, b, c;
    a + b, 0, 1;
};
// same as:
// println!("a = {:?}, b = {:?}, c = {:?}", a, b, c);
// println!("a + b = {:?}, 0 = {:?}, 1 = {:?}", a + b, 0, 1);

Strings are printed with quotes. If this is undesirable, prefix them with an _. This will make the macro use Display instead of Debug.

p!(_"Test"); // same as println!("{}", "Test");
let a = "x"; p!(_ a); // if necessary insert a space

To run the file on the examples folder, type cargo run --example print.