with

Sends a value into a coroutine as part of resume: resume h with value.

The value becomes the result of the yield the coroutine is suspended at.

gen fn adder() {
    let total = 0;
    while true {
        let n = yield total;
        total = total + n;
    }
}

fn main() {
    let h = adder();
    resume h;
    let now = resume h with 5; // 5
}

See also#

• fn: Declares a function, a method, or (written in an expression) an anonymous function.
• let: Declares a mutable local variable.
• const: Declares a binding that cannot be reassigned: a local, a module constant, or a class field that is set only by new.
• static: Declares a module-level or class-level slot shared by the whole program, or a method without self.
• readonly: A read-only view of a value: nothing reachable through it can be changed.
• if: Runs a block when a bool condition is true.
• else: Introduces the branch of an if that runs when its condition is false (or its pattern does not match).
• while: Repeats a block while a bool condition is true.