2 releases
0.2.1 | Nov 16, 2021 |
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0.2.0 | Nov 16, 2021 |
#9 in #dbg
5KB
printd
This crate provides a slightly modified version of the dbg!()
macro.
The printd!()
macro prints one or more expression which can be annotated with a label.
In contrast to the dbg!()
macro from std
, it does not use the "fancy" debug formatter (:#?
)
as it's output is sometimes just to big if you debug more then a few variables.
The macro also supports printing debug messages and labeling multiple expressions. (See examples.)
There is also eprintd!()
for printing to stderr
.
Examples
Basic usage.
printd!(1 + 2);
// [printd/README.md:20] 1 + 2 = 3
Usage like dbg!()
But way smaller output.
let foo = vec![1, 2, 3];
dbg!(foo);
// [printd/README.md:31] foo = [
// 1,
// 2,
// 3,
// ]
let foo = vec![1, 2, 3];
printd!(foo);
// [printd/README.md:39] foo = [1, 2, 3]
Supports multiple expressions.
let foo = vec![1, 2, 3];
let bar = 69;
printd!(foo, bar);
// [printd/README.md:50] foo = [1, 2, 3]
// [printd/README.md:50] bar = 69
Supports (pretty) debug messages.
The dbg!()
macro don't cares if the message is a string literal and
prints ugly output.
dbg!("Hello world!");
// [printd/README.md:62] "Hello world!" = "Hello world!"
printd!("Hello world!");
// [printd/README.md:65] "Hello world!"
You can label debug expressions to organize them a bit more. Expressions with a label print the source location just once.
let foo = vec![1, 2, 3];
let bar = 69;
let idk = String::from("Something else then foo and bar\n");
printd!("Very important variables", foo, bar);
// [printd/README.md:77] Very important variables
// foo = [1, 2, 3]
// bar = 69
// idk = "Something else then foo and bar\n"