typenum_loops

一个库，提供在编译时完全或部分展开的循环。

extern crate typenum;
extern crate typenum_loops;

use typenum::{U4, U6};
use typenum_loops::Loop;

fn main(){
    let arr: &mut[usize] = &mut[0; 4];
    // for i in 0..4 {arr[i] = i} fully unrolled by 4
    U4::full_unroll(&mut |i| arr[i] = i);
    
    let arr2: &mut[usize] = &mut[0; 13];
    // for i in 0..13 {arr2[i] = i} unrolled by 6
    U6::partial_unroll(13, &mut |i, _| arr2[i] = i);
}

注意：尽管尝试通过使用空的包装函数来欺骗 llvm，但非常大的闭包可能不会内联。

许可证

MIT

lib.rs:

#示例

extern crate typenum;
extern crate typenum_loops;

use typenum::{U4, U6};
use typenum_loops::Loop;

fn main(){
    let arr: &mut[usize] = &mut[0; 4];
    // for i in 0..4 {arr[i] = i} fully unrolled by 4
    U4::full_unroll(&mut |i| arr[i] = i);

    let arr2: &mut[usize] = &mut[0; 13];
    // for i in 0..13 {arr2[i] = i} unrolled by 6
    U6::partial_unroll(13, &mut |i, _| arr2[i] = i);
}