assertables

Macro assert_diff_lt_x

Source 
macro_rules! assert_diff_lt_x {
    ($a:expr, $b:expr, $x:expr $(,)?) => { ... };
    ($a:expr, $b:expr, $x:expr, $($message:tt)+) => { ... };
}
Expand description

Assert a difference is less than an expression.

Pseudocode:
Δ < x

  • If true, return (lhs, rhs).

  • Otherwise, call panic! with a message and the values of the expressions with their debug representations.

§Examples

use assertables::*;

let a: i8 = 10;
let b: i8 = 13;
let x: i8 = 4;
assert_diff_lt_x!(a, b, x);

// This will panic
let a: i8 = 10;
let b: i8 = 13;
let x: i8 = 2;
assert_diff_lt_x!(a, b, x);
// assertion failed: `assert_diff_lt_x!(a, b, x)`
// https://docs.rs/assertables/…/assertables/macro.assert_diff_lt_x.html
//        a label: `a`,
//        a debug: `10`,
//        b label: `b`,
//        b debug: `13`,
//        x label: `x`,
//        x debug: `2`,
//              Δ: `3`,
//          Δ < x: false

§Module macros