CargoBayStatusCode typedef Question

[wtholliday]

I get link errors otherwise.

[mattt]

Really? It's just a regular enum (NS_ENUM). I don't think this is the problem.

Can you elaborate? Copy paste the aforementioned link errors?

[wtholliday]

Notice the difference in the declaration between CargoBayStatusCode and CargoBayErrorCode. The latter is a typedef.

Link errors are:
duplicate symbol _CargoBayStatusCode in...

Adding the typedef keyword fixed it. The compiler is generating an actual variable, hence the link error.

Here's the preprocessed source:

NSInteger CargoBayStatusCode; enum {
    CargoBayStatusOK = 0,

    CargoBayStatusCannotParseJSON = 21000,
    CargoBayStatusMalformedReceiptData = 21002,
    CargoBayStatusCannotAuthenticateReceiptData = 21003,
    CargoBayStatusSharedSecretDoesNotMatch = 21004,
    CargoBayStatusReceiptServerUnavailable = 21005,
    CargoBayStatusReceiptValidButSubscriptionExpired = 21006,
    CargoBayStatusSandboxReceiptSentToProduction = 21007,
    CargoBayStatusProductionReceiptSentToSandbox = 21008
};

This results in an NSInteger global being declared in each file I include CargoBay.

[mattt]

If a static declaration also fixes your issue, that would be the desired change.

[wtholliday]

Then why is CargoBayErrorCode declared as a typedef?

Everywhere I see online, including your own article, NS_ENUM is preceded by the typedef keyword.

[mattt]

Then why is CargoBayErrorCode declared as a typedef?

Because it's actually used as a type. CargoBayStatusCode is just an enum used to define constants. It could just as well be enum instead of NS_ENUM.

[wtholliday]

Does it preprocess to something different on your end? The above preprocessed source would cause a declaration of CargoBayStatusCode in each file where CargoBay.h is included, which unless I'm going crazy, causes link errors.

[wtholliday]

Ok, when I make a new project, it does preprocess to something else:

enum CargoBayStatusCode : NSInteger CargoBayStatusCode; enum CargoBayStatusCode : NSInteger {
    CargoBayStatusOK = 0,

    CargoBayStatusCannotParseJSON = 21000,
    CargoBayStatusMalformedReceiptData = 21002,
    CargoBayStatusCannotAuthenticateReceiptData = 21003,
    CargoBayStatusSharedSecretDoesNotMatch = 21004,
    CargoBayStatusReceiptServerUnavailable = 21005,
    CargoBayStatusReceiptValidButSubscriptionExpired = 21006,
    CargoBayStatusSandboxReceiptSentToProduction = 21007,
    CargoBayStatusProductionReceiptSentToSandbox = 21008
};

Sigh.

[wtholliday]

Oh, ok I see why. You can't import CargoBay.h in an Objective-C++ (.mm) file.

Here's a simple project which demonstrates the link errors:

https://dl.dropboxusercontent.com/u/45540223/CargoBayTest.zip

[mattt]

typedef added with d8b34d3. Should be fixed for Objective-C++