unwrap_helpers

提供清理代码和改进生产的解包宏。这包括对 https://github.com/Mrp1Dev/loop_unwrap 的 pub use，以获取解包循环宏的访问权限。

/// 与 .unwrap 类似，如果是 Err(_) 或 None，则调用 return。/// 可能返回无数据或数据。可以使用返回父函数返回类型的闭包或函数。

示例

fn ret_test_fail() -> i32 {
    let opt = None;

    let _ = unwrap_or_return!(opt, 0);

    1
}

fn ret_as_option_fail() -> Option<i32> {
    let opt = None;

    let _ = unwrap_or_return!(opt, Some(0));

    None
}

fn test_send(x: i32) -> i32 {
    x + 1
}

fn ret_fn_fail() -> i32 {
    let x = 5;
    let opt = None;

    let _ = unwrap_or_return!(opt, test_send(x));

    1
}

fn ret_closure_fail() -> i32 {
    let x = 5;
    let opt = None;

    let _ = unwrap_or_return!(opt, || x + 1);

    1
}

fn ret_closure_ret_fail() -> i32 {
    let x = 5;
    let opt = None;

    let _ = unwrap_or_return!(opt, || -> i32 { x + 1 });

    1
}

fn ret_closure_ret_fail_insert() -> i32 {
    let x = 5;
    let opt = None;

    let _ = unwrap_or_return!(opt, |x1| x1 + 1, x);

    1
}

fn test_no_return() {
    let input = Option::None;
    let parsed_input = unwrap_or_return!(input);
}