macro_rules! assert_fn_le_expr_as_result { ($a_function:path, $a_param:expr, $b_expr:expr) => { ... }; ($a_function:path, $b_expr:expr) => { ... }; }
Expand description
Assert a function output is less than or equal to an expression.
-
If true, return
Ok(())
. -
Otherwise, return
Err
with a message and the values of the expressions with their debug representations.
Examples
This macro provides the same statements as [assert_
],
except this macro returns a Result, rather than doing a panic.
This macro is useful for runtime checks, such as checking parameters, or santizing inputs, or handling different results in different ways.