Macro assertables::assume_io_le

macro_rules! assume_io_le {
    ($left:expr, $right:expr $(,)?) => { ... };
    ($left:expr, $right:expr, $($arg:tt)+) => { ... };
}

Assume one value is less than or equal to another value.

• 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.

Examples

let x = assume_io_le!(1, 2);
//-> Ok(true)

let x = assume_io_le!(2, 1);
//-> Err(
//       std::io::Error::new(
//           std::io::ErrorKind::InvalidInput, 
//           "assumption failed: `assume_io_le(left, right)`\n  left: `2`\n right: `1`")]
//       )
//   )

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