Swift fails to compile enum with two data cases

Originator:jlieske
Number:rdar://17228613 Date Originated:09-Jun-2014 00:27 AM
Status:Duplicate Resolved:
Product:OS X SDK Product Version:Xcode6 beta: Version 6.0 (6A215l)
Classification:Crash Reproducible:Always
 
The Swift language supports enums with type parameters for associated values.  Such enum types should support recursive relationships, such as the classic linked list.  

For example, this seems to be a reasonable enum declaration:

enum Result<SuccessType, ErrorType> {
    case Success(SuccessType)
    case Error(ErrorType)
}

However, it fails to compile in Swift source code files.  The compiler reports the error:

/Users/jay/Coding/Swift/TrySwift/TryEither/main.swift:11:6: error: unimplemented IR generation feature non-fixed multi-payload enum layout
enum Result<SuccessType, ErrorType> {
     ^
LLVM ERROR: unimplemented IRGen feature! non-fixed multi-payload enum layout
Command /Applications/Xcode6-Beta.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/swift failed with exit code 1


Furthermore, pasting that class definition in a Playground file causes Xcode to crash.  When Xcode tries to re-launch with the Playground file with the definition, it crashes repeatedly.

Comments

Apple closed as duplicate of rdar://16020432

By jlieske at June 21, 2014, 7:42 p.m. (reply...)

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