mirror of
https://github.com/idris-lang/Idris2.git
synced 2024-12-18 16:51:51 +03:00
40 lines
1.2 KiB
Idris
40 lines
1.2 KiB
Idris
libcb : String -> String
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libcb f = "C:" ++ f ++", libcb"
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%foreign libcb "add"
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add : Int -> Int -> Int
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%foreign libcb "applyIntFn"
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prim_applyIntFn : Int -> Int -> (Int -> Int -> PrimIO Int) -> PrimIO Int
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%foreign libcb "applyCharFn"
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prim_applyCharFn : Char -> Int -> (Char -> Int -> PrimIO Char) -> PrimIO Char
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%foreign libcb "applyIntFnPure"
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applyIntFnPure : Int -> Int -> (Int -> Int -> Int) -> Int
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applyIntFn : HasIO io => Int -> Int -> (Int -> Int -> IO Int) -> io Int
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applyIntFn x y fn
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= primIO $ prim_applyIntFn x y (\a, b => toPrim (fn a b))
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applyCharFn : HasIO io => Char -> Int -> (Char -> Int -> IO Char) -> io Char
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applyCharFn x y fn
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= primIO $ prim_applyCharFn x y (\a, b => toPrim (fn a b))
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cb : Int -> Int -> IO Int
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cb x y
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= do putStrLn $ "In callback with " ++ show (x, y)
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pure (x + y)
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main : IO ()
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main
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= do printLn (add 4 5)
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res <- applyIntFn (add 4 5) 6 (\x, y => do putStrLn "In callback"
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pure (x * 2 + y))
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printLn res
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res <- applyIntFn 1 2 cb
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printLn res
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printLn (applyIntFnPure 5 4 (\x, y => x + y))
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res <- applyCharFn 'a' 10 (\x, y => pure (cast (cast x + y)))
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printLn res
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