id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	os	architecture	failure	difficulty	testcase	blockedby	blocking	related
7048	Add the ability to statically define a `FunPtr` to a haskell function	pcapriotti		"Lauri Alanko [http://haskell.1045720.n5.nabble.com/Static-non-exported-stubs-td5713489.html suggests] that there should be a way to define a callback to a haskell function statically (i.e. without using a dynamic wrapper).

It is currently possible to do so only by exporting the function and reimporting it as a function pointer:

{{{
foreign export ccall ""my_callback"" myCallback :: IO ()
foreign import ccall ""&my_callback"" myCallbackPtr :: FunPtr (IO ())
}}}

but of course this not ideal because it creates an extra symbol (and is quirky).

A possible new syntax could be:

{{{
foreign import ccall myCallbackPtr :: FunPtr (IO ()) = myCallback
}}}

or variations thereof. We probably want to keep `import` (rather than `export` or some new keyword), since this declaration brings something into scope, like a normal FFI import."	feature request	new	normal	7.8.1	Compiler	7.4.2			la@… iavor.diatchki@…	Unknown/Multiple	Unknown/Multiple	None/Unknown	Unknown