Matt Zanchelli mdznr

mdznr / Swift Assertion Cheat Sheet.md

Last active February 16, 2022 23:31

Compares the different behaviors of the various assertion functions in Swift

function	debug	release	release
Optimization Level	`-Onone`	`-O`	`-Ounchecked`
`assert()`	YES	NO	NO
`assertionFailure()`	YES	NO	NO^**
`precondition()`	YES	YES	NO
`preconditionFailure()`	YES	YES	YES^**
`fatalError()`^*	YES	YES	YES

| Value | Meaning |