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https://issues.apache.org/jira/browse/THRIFT-4005?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16753550#comment-16753550
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Isaac Sheff commented on THRIFT-4005:
-------------------------------------
re: James E. King III
The (haskell package) version used was "1.0.0-dev" as seen in
[https://github.com/apache/thrift/blob/ec64f23d236d7874e3b28ae86c833f57c7aa3389/lib/hs/thrift.cabal]
> Better Haskell Support for Union Types in Thrift
> ------------------------------------------------
>
> Key: THRIFT-4005
> URL: https://issues.apache.org/jira/browse/THRIFT-4005
> Project: Thrift
> Issue Type: Improvement
> Components: Haskell - Compiler, Haskell - Library
> Reporter: Isaac Sheff
> Priority: Minor
> Labels: features
> Original Estimate: 1m
> Remaining Estimate: 1m
>
> Thrift's Haskell implementation presently expresses union types as product
> types. While this is sufficient for functionality, and may mirror the way
> Thrift works under the hood, it requires the programmer to write unnecessary
> runtime checks and matches to find the filled field, and verify there is
> precisely one.
> I propose augmenting the existing Haskell Thrift system with union Haskell
> types for union Thrift types, and augmenting the interface definitions so the
> user can define a service in terms of either the legacy product types or the
> new union types.
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