Re: [Haskell-cafe] Writing a Storable instance for a C union

13 Dec 2013


      On 12/13/2013 05:00 PM, Nikita Karetnikov wrote:
...
Could anyone explain how to write a Storable instance for MyStruct?
(The key field allows to determine the type of a value inside the
union.)
You can peek the "key", and then, depending on its value, return a
different constructor :

data MyStruct = MyStructOne Foo
              | MyStructFour Integer
              | MyStructTwenty [Blah]

Re: [Haskell-cafe] Writing a Storable instance for a C union

Simon Marechal