Macro assert_err_eq_x_as_result 

macro_rules! assert_err_eq_x_as_result {
    ($a:expr, $b:expr $(,)?) => { ... };
}

Assert an expression is Err and its value is equal to an expression.

Pseudocode:
(a ⇒ Err(a1) ⇒ a1) = b

• If true, return Result Ok(a1).

• Otherwise, return Result Err(message).

This macro is useful for runtime checks, such as checking parameters, or sanitizing inputs, or handling different results in different ways.

Module macros

• assert_err_eq_x
• assert_err_eq_x_as_result
• debug_assert_err_eq_x