2 releases
0.1.1 | Mar 16, 2020 |
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0.1.0 | Mar 16, 2020 |
#1412 in Rust patterns
Used in nenv
7KB
58 lines
xkcd_unreachable
A Rust macro xkcd_unreachable!()
inspired by xkcd 2200
Example
use xkcd_unreachable::xkcd_unreachable;
fn foo(x: Option<i32>) {
match x {
Some(n) if n >= 0 => println!("Some(Non-negative)"),
Some(n) if n < 0 => println!("Some(Negative)"),
Some(_) => xkcd_unreachable!(),
None => println!("None")
}
}
Output if reached
⚠ ERROR
If you're seeing this, the code is in what
I thought was an unreachable state.
I could give you advice for what to do.
But honestly, why should you trust me?
I clearly screwed this up. I'm writing a
message that should never appear, yet
I know it will probably appear someday.
On a deep level, I know I'm not
up to this task. I'm so sorry.
<https://xkcd.com/2200/>
For more information, see the documentation.