Re: Trouble with imported enums in Swift
Re: Trouble with imported enums in Swift
- Subject: Re: Trouble with imported enums in Swift
- From: Rick Mann <email@hidden>
- Date: Tue, 21 Oct 2014 14:35:42 -0700
> On Oct 21, 2014, at 14:26 , Quincey Morris <email@hidden> wrote:
>
> On Oct 21, 2014, at 13:33 , Rick Mann <email@hidden> wrote:
>>
>> Honestly, though, I don't see why Swift can't just deal with "plain" enums.
>
> Because it’s not an Obj-C compiler?
>
> I suspect that the reason you saw the “incomplete” behavior is that you declared the enum in two parts:
>
>> enum McpSweepState
>> {
>> MCP_SWEEP_UNKNOWN = 0,
>> MCP_SWEEP_EMPTY = 1,
>> MCP_SWEEP_ROTATING = 2,
>> MCP_SWEEP_PROCESSING = 3,
>> MCP_SWEEP_COMPLETE = 4,
>> MCP_SWEEP_CANCELED = 5,
>> MCP_SWEEP_ABORTED_PHYSICAL = 6,
>> MCP_SWEEP_ABORTED_DATA = 7,
>> MCP_SWEEP_ERROR = 8,
>> };
>> typedef enum McpSweepState McpSweepState;
>
> Under this theory, Swift is able to parse the typedef, so it knows that ‘McpSweepState’ is a type, and maybeeven an enum, but it doesn’t know what the values are. That might be enough to let it assign, but not to compare (since == is not a built-in operator).
>
> Or, it might be that it can parse the enum, but it doesn’t know its underlying type, since you didn’t say ‘enum McpSweepState : NSUInteger’ or some such.
>
> Honestly, though, I don’t see why you can’t just deal with writing enums the “compatible” way.
Because the file whence it comes is part of a library of C++ code that also has to run on Linux.
--
Rick Mann
email@hidden
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