The #[reciter] attribute macro allows converting a recursive function into an Iterator, which uses a cache.
Example
For more information about look into the documentation or at the tests in the repository.
The #[reciter] attribute macro allows converting a recursive function into an Iterator, which uses a cache.
#[reciter(cache = "auto", start = 1)]
fn factorial(n: usize) -> BigInt {
if n == 1 {
BigInt::from(1)
} else {
n * factorial(n - 1)
}
}
fn main() {
let fi = FactorialIterator::new();
for (i, fac) in fi.enumerate().take(512) {
println!("{}! = {}", i + 1, fac);
}
}
For more information about look into the documentation or at the tests in the repository.