macro_rules! assert_eq { ($left:expr, $right:expr $(,)?) => { ... }; ($left:expr, $right:expr, $($arg:tt)+) => { ... }; }
Expand description
Asserts that two expressions are equal to each other (using PartialEq
).
On panic, this macro will print the values of the expressions with their debug representations.
Like assert!
, this macro has a second form, where a custom
panic message can be provided.
§Examples
let a = 3;
let b = 1 + 2;
assert_eq!(a, b);
assert_eq!(a, b, "we are testing addition with {} and {}", a, b);
Run