macro_rules! assert_eq { ($left:expr, $right:expr $(,)?) => { ... }; ($left:expr, $right:expr, $($arg:tt)+) => { ... }; }
Expand description
core
Asserts that two expressions are equal to each other.
Re-exported from core
.
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);