Friends! Are you sick of merely returning Results instead of really expressing them?
Look no further! We present for your amusement:
For example:
good!(yay);
bad!(nay);
fn maybe_divide(a: i32, b: i32) -> Result<32, &'static str> {
if b == 0 {
nay!("Dividing by zero? Not on my watch!")
} else {
yay!(a / b)
}
}
The exclamation points are mandatory!!! (Limit of one exclamation point per result value please!)
They also work in pattern matches!
good!(wow);
bad!(woe);
fn parse_default(raw: &str, default: i32) -> i32 {
match raw.parse::<i32>() {
wow!(n) => n,
woe!(_) => default,
}
}
Other favorite pairs include:
uh_huh! / uh_uh!
heck_yeah! / heck_no!
oh_yes! / oh_no!
Happy Hacking!
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