hoist_temporaries

过程宏，用于扩展临时变量的生命周期。

示例

有关更多示例，请参阅 工作示例。

#[hoist_temporaries::hoist_temporaries]
fn main() {
    #[hoist_temporaries::hoist]
    let mut snack = "Cheese";
    if true {
        // Without hoist_temporaries, this would error because the format!() returns a temporary which would otherwise be dropped because it has no owner.
        snack = &format!("{}burger", snack);
    }
    assert_eq!(snack, "Cheeseburger");
}