Macro assert_err_ne_expr_as_result

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

Assert an expression is Err(_) and its value is equal to an expression.

Pseudocode:
(a ⇒ Err(a̅) ⇒ a̅) = b

• If true, return Result Ok(()).

• Otherwise, return Result Err with a diagnostic message.

This macro provides the same statements as assert_err_ne_expr, except this macro returns a Result, rather than doing a panic.

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_ne_expr
• assert_err_ne_expr_as_result
• debug_assert_err_ne_expr