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From "Isaac Sheff (JIRA)" <>
Subject [jira] [Commented] (THRIFT-4005) Better Haskell Support for Union Types in Thrift
Date Sun, 27 Jan 2019 19:11:00 GMT


Isaac Sheff commented on THRIFT-4005:

re: James E. King III

The (haskell package) version used was "1.0.0-dev" as seen in []


> Better Haskell Support for Union Types in Thrift
> ------------------------------------------------
>                 Key: THRIFT-4005
>                 URL:
>             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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