That one syntax sugar library you (may have) wished you wrote yourself.
This library provides the for_let! macro, so you can write code like this:
rust
for_let!(Some(Complex(Pattern(foo))) in iteratee {
// do stuff
});
Which is just sugar for this:
rust
for el in iteratee {
match el {
Some(Complex(Pattern(foo))) => {
// do stuff
}
_ => {}
}
}
Accepts all patterns that are legal in a match arm. How Pythonic!