Clonesure

A helper macro to create closures which will clone its environment.

Getting Started

Use @var to clone a variable. Use @mut var to clone a mutable variable.

E.g.:

rust cc!(|@a, @mut b, c| { a + b + c })

will be translated to:

rust { let a = a.clone(); let mut b = b.clone(); move |c| { a + b + c } }

Examples

```rust use clonesure::cc;

fn main() { // clone one var let s1 = String::from("111"); assert_eq!( cc!(|@s1| format!("{}", s1))(), "111" );

// clone many vars let s1 = String::from("111"); let s2 = String::from("222"); assert_eq!( cc!(|@s1, @s2| format!("{} {}", s1, s2))(), "111 222" );

// clone var mut let s1 = String::from("111"); let s2 = String::from("222"); assert_eq!( cc!(|@mut s1, @s2| { s1 = s1 + &s2; format!("{}", s1) })(), "111222" );

// with closure params let s1 = String::from("111"); let s2 = String::from("222"); assert_eq!( cc!(|@mut s1, @s2, s3| { s1 = s1 + &s2; format!("{} {}", s1, s3) })("333"), "111222 333" );

// order & count doesn't matter let s2 = String::from("222"); let s3 = String::from("333"); let s4 = String::from("444"); let s5 = String::from("555"); assert_eq!( cc!(|s1, @s2, @mut s3, @mut s4, @s5, s6| { s3 = s2 + &s3; s4 = s4 + &s5; format!("{} {} {} {}", s1, s3, s4, s6) })("111", "666"), "111 222333 444555 666" );

// ref params are not supported for now, but will be added in the future // cc!(|&s1, &mut s2| {}) } ```