#proc-macro #recursion #iterator

macro reciter

Macro that allows converting a recursive function into an Iterator, which uses a cache

3 releases

0.1.2 Nov 10, 2018
0.1.1 Nov 10, 2018
0.1.0 Nov 10, 2018

#86 in Procedural macro helpers

Download history 34/week @ 2018-11-16 4/week @ 2018-11-23 6/week @ 2018-11-30 10/week @ 2018-12-07

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MIT license

13KB
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The #[reciter] attribute macro allows converting a recursive function into an Iterator, which uses a cache.

Example

#[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 look into the documentation or at the tests in the repository.

Dependencies

~1MB
~22K SLoC