Macro assertables::assure_io

macro_rules! assure_io {
    ($x:expr $(,)?) => { ... };
    ($x:expr, $($arg:tt)+) => { ... };
}

Assure a condition is true.

• When true, return Ok(true).

• When false, return Ok(false).

• Otherwise, return Err with a message and the values of the expressions with their debug representations.

Example

let x = assure_io!(true);
//-> Ok(true)

let x = assure_io!(false);
//-> Ok(false)

This macro has a second form where a custom message can be provided.