core::debug_assert_eq!
[−]
[src]
macro_rules! debug_assert_eq { ($($arg:tt)*) => (if cfg!(debug_assertions) { assert_eq!($($arg)*); }) }
Asserts that two expressions are equal to each other, testing equality in both directions.
On panic, this macro will print the values of the expressions.
Unlike assert_eq!
`assert_eq!,
`, debug_assert_eq!
`debug_assert_eq!statements are only enabled in non optimized builds by default. An optimized build will omit all
` statements are only enabled in non
optimized builds by default. An optimized build will omit all
debug_assert_eq!
`debug_assert_eq!statements unless
` statements unless -C debug-assertions
`-C debug-assertionsis passed to the compiler. This makes
` is passed to the
compiler. This makes debug_assert_eq!
`debug_assert_eq!` useful for checks that are too
expensive to be present in a release build but may be helpful during
development.
Examples
fn main() { let a = 3; let b = 1 + 2; debug_assert_eq!(a, b); }let a = 3; let b = 1 + 2; debug_assert_eq!(a, b);