{-# LANGUAGE TypeFamilies #-}
module LLVM.Extra.Execution
   {-# DEPRECATED "It is based on ExecutionEngine.getPointerToFunction which is error-prone since llvm-tf-3.1." #-}
   where

import qualified LLVM.ExecutionEngine as EE
import qualified LLVM.Core as LLVM

import Foreign.Ptr (FunPtr, )

import Control.Monad (liftM2, liftM3, )


class Compile externFunction where
   type LLVMFunction externFunction :: *
   compile :: LLVMFunction externFunction -> EE.EngineAccess externFunction

instance Compile (FunPtr f) where
   type LLVMFunction (FunPtr f) = (LLVM.Function f)
   compile = EE.getPointerToFunction

instance (Compile fa, Compile fb) => Compile (fa,fb) where
   type LLVMFunction (fa,fb) = (LLVMFunction fa, LLVMFunction fb)
   compile (fa,fb) =
      liftM2 (,)
         (compile fa)
         (compile fb)

instance (Compile fa, Compile fb, Compile fc) => Compile (fa,fb,fc) where
   type LLVMFunction (fa,fb,fc) = (LLVMFunction fa, LLVMFunction fb, LLVMFunction fc)
   compile (fa,fb,fc) =
      liftM3 (,,)
         (compile fa)
         (compile fb)
         (compile fc)