Function contract_check_requires

pub const fn contract_check_requires<C>(cond: C)where
    C: Fn() -> bool + Copy,

🔬This is a nightly-only experimental API. (contracts_internals #128044)

Check if the pre-condition cond has been met.

By default, if contract_checks is enabled, this will panic with no unwind if the condition returns false.

Note that this function is a no-op during constant evaluation.