Variadic Functions in CLIPS

Here’s a function that will take an arbitrary number of ints as arguments.

fn sum(nums: &[i32]) {
    println!("{:?} ", nums);
    let mut total = 0;
    for &num in nums {
        total += num;
    }
    println!("{}", total);
}

fn main() {
    // Variadic functions can be called in the usual way with individual arguments.
    sum(&[1, 2]);
    sum(&[1, 2, 3]);

    // If you already have multiple args in a slice, apply them to a variadic function using ...
    let nums = vec![1, 2, 3, 4];
    sum(&nums);
}

To compile and run the Rust program, use the following commands:

$ rustc main.rs
$ ./main
[1, 2] 3
[1, 2, 3] 6
[1, 2, 3, 4] 10

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Variadic Functions in CLIPS