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No instance for (M.Storable (Int32, Float)) #328

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wujilingfeng opened this issue Jul 5, 2023 · 1 comment

wujilingfeng commented Jul 5, 2023 •

edited

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I was writing a sparse matrix type

data Sparse_Matrix1= Sp_M1 (M.Array M.S M.Ix2 (Int32,Float)  )  
    deriving (Show)

But it throwed an error

error:
    • No instance for (M.Storable (Int32, Float))
        arising from the first field of ‘Sp_M1’
          (type ‘M.Array M.S M.Ix2 (Int32, Float)’)
      Possible fix:
        use a standalone 'deriving instance' declaration,
          so you can specify the instance context yourself
    • When deriving the instance for (Show Sparse_Matrix1)
      deriving (Show)

How to write a instance for M.Storable (Int32,Float)?

Owner

FransBouma commented Jul 5, 2023

I don't think you're in the right repository, this is the .NET massive :)

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