Question

我在Haskell sendfile中找到了这一编号。一揽子:

http://TOP-tag.com/r/mae/sendfile/snapshot/tant/content/pretty/src/Network/Socket/SendFile/parties.hsc

-- sendfile64 gives LFS support
foreign import ccall unsafe "sendfile64" c_sendfile
  :: Fd -> Fd -> Ptr (#type off64_t) -> (#type size_t) -> IO (#type ssize_t)

(1) 什么是<条码>第2类的含义和2”,为什么我有这个错误。

[1 of 1] Compiling Linux.Splice     ( splice.hs, splice.o )

pl:40:12: parse error on input `type

when I myself try to use it as follows?:

ghc --make splice.hs

pl:

{-# LANGUAGE ForeignFunctionInterface #-}

module Linux.Splice where

import Data.Word
import System.Posix.Types

-- SPLICE

 -- fcntl.h
 -- ssize_t splice(
 --   int          fd_in,
 --   loff_t*      off_in,
 --   int          fd_out,
 --   loff_t*      off_out,
 --   size_t       len,
 --   unsigned int flags
 -- );

foreign import ccall unsafe "fnctl.h splice" c_splice
  :: Fd
  -> Ptr (#type {- < parse error -} loff_t)
  -> Fd
  -> Ptr (#type loff_t)
  -> (#type size_t)
  -> Word
  -> IO (#type ssize_t)

(使用GHC 7.4.x)

Answer 1

正如scdvc所指出的,这利用了 hsc2hs ,专门根据正在编纂的系统定制该代码。您需要使用<代码>hsc2hs,以获得为你的代码规定的适当的宏观。

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