Unreachable
A Swift microframework that provides hints to the compiler about unreachable code paths for optimization.
What is Unreachable?
Unreachable is a Swift microframework that provides hints to the compiler about unreachable code paths, enabling more aggressive optimizations. It solves the problem of the compiler being unable to infer that certain code branches are never executed, which can lead to unnecessary runtime checks and larger binary sizes. By using `assertUnreachable()`, developers can improve performance in optimized builds while maintaining safety in debug builds.
Swift developers working on performance-critical applications, system-level code, or libraries where fine-grained control over compiler optimizations is necessary. It is particularly useful for those targeting Apple platforms (iOS, macOS, watchOS, tvOS) or Linux.
Developers choose Unreachable because it offers a safe, lightweight way to eliminate unnecessary runtime overhead without resorting to undefined behavior. Its `assertUnreachable()` function provides debug-time safety while enabling significant performance gains in release builds, making it a superior alternative to `fatalError()` for optimization hints.
Overview
Unreachable code path optimization hint for Swift
Use Cases
Best For
- Optimizing Swift performance-critical loops with dynamic exits
Related Projects
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