macro_rules! assert_fn_le_expr { ($a_function:path, $a_param:expr, $b_expr:expr $(,)?) => { ... }; ($a_function:path, $a_param:expr, $b_expr:expr, $($message:tt)+) => { ... }; ($a_function:path, $b_expr:expr $(,)?) => { ... }; ($a_function:path, $b_expr:expr, $($message:tt)+) => { ... }; }
Expand description
Assert a function output is less than or equal to an expression.
Pseudocode:
function(a) ≤ b
-
If true, return
()
. -
Otherwise, call
panic!
with a message and the values of the expressions with their debug representations.
§Examples
let a: i8 = -1;
let b: i8 = 2;
assert_fn_le_expr!(i8::abs, a, b);
let a: i8 = -2;
let b: i8 = 1;
assert_fn_le_expr!(i8::abs, a, b);
// assertion failed: `assert_fn_le_expr!(a_function, a_param, b_expr)`
// https://docs.rs/assertables/8.9.0/assertables/macro.assert_fn_le_expr.html
// a_function label: `i8::abs`,
// a_param label: `a`,
// a_param debug: `-2`,
// b_expr label: `b`,
// b_expr debug: `1`,
// a: `2`,
// b: `1`