module Data.Number.Flint.Support.D.Mat.Instances where import System.IO.Unsafe import Foreign.C.String import Foreign.Marshal.Alloc ( free ) import Data.Number.Flint.Support.D.Mat instance Show DMat where show :: DMat -> String show DMat x = IO String -> String forall a. IO a -> a unsafePerformIO (IO String -> String) -> IO String -> String forall a b. (a -> b) -> a -> b $ do (DMat _, CString cs) <- DMat -> (Ptr CDMat -> IO CString) -> IO (DMat, CString) forall {a}. DMat -> (Ptr CDMat -> IO a) -> IO (DMat, a) withDMat DMat x Ptr CDMat -> IO CString d_mat_get_str String s <- CString -> IO String peekCString CString cs CString -> IO () forall a. Ptr a -> IO () free CString cs String -> IO String forall a. a -> IO a forall (m :: * -> *) a. Monad m => a -> m a return String s