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From "Mike Riley (Commented) (JIRA)" <>
Subject [jira] [Commented] (THRIFT-1340) Add support of ARC to Objective-C
Date Fri, 02 Dec 2011 00:16:40 GMT


Mike Riley commented on THRIFT-1340:

Hirano: This worked beautifully, no issues, even mixing -fno-objc-arc flagged files in with
those using arc had no problem in my project. I've been using it for a few weeks.  It's highly
appreciated and ARC library compatibility is an obvious issue with any new Cocoa based projects.

Jake: Have you had a chance to review this? The patch still works against the latest trunk.
Also, I have a few things I'd like to commit eventually that depend on this, committing could
save someone the trouble of rebasing.
> Add support of ARC to Objective-C
> ---------------------------------
>                 Key: THRIFT-1340
>                 URL:
>             Project: Thrift
>          Issue Type: Improvement
>          Components: Cocoa - Compiler, Cocoa - Library
>    Affects Versions: 0.7
>         Environment: Mac OS X Lion, iOS 4.2, 4.3, 5.0..
>            Reporter: HIRANO Satoshi
>         Attachments: THRIFT-0.8.0-dev_cocoa_ARC.patch
>   Original Estimate: 24h
>  Remaining Estimate: 24h
> Objective-C in Xcode 4.2 supports ARC (Automatic Reference Counting, not GC but similar)
and now it is the default both on OS X Lion and iOS 5. (ARC works on iOS 4.2 or higher.)
> The conventional Objective-C code includes many retain/release/autorelease for maintaining
 the life time of objects.
> Since the latest Objective-C compiler automatically generates stubs for reference counting,
code should not include any retain/release/autorelease.
> Many Mac OS/iOS projects are moving to ARC mode. Although we can specify a compiler flag
which tells ARC or no-ARC file by file in Xcode 4.2, there is no means to tell the Xcode that
files generated by the thrift compiler are no-ARC. Xcode produces many error messages like
"retain is not allowed in ARC mode". 
> So, the thrift compiler should support ARC mode.
> What we need are:
> 1) add -objc-arc flag to the thrift compiler.
> 2) If -objc-arc flag exists, omit generating code for retain/release/autorelease.
> Please look at "Programming with ARC reference notes" in iOS developer library.

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