How to write this correct...
Hi, I have the following problem: Vertex3 ist defined as data Vertex3 a = Vertex3 a a a a is defined as class a VertexComponent But I fail to write to following correct type GLVertex = (GLfloat, GLfloat, GLfloat) toVertex :: GLVertex -> Vertex3 a how do it correctly toVertex (x,y,z) = Vertex3 x y z The compiler says cannot infer a with type GLFloat or something like this I don't understand. Thank you for help Hans ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: How to write this correct...
Hi, The type signature is wrong. Try this.. toVertex :: GLVertex - Vertex3 GLfloat or perhaps.. toVertex :: (a,a,a) - Vertex3 a Regards Yes this works (the first variant). Thanks ! But I must say that I have problems to understand the class mechanism in its full extend Greetings Hans ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: Talking with the compiler
Hi, I agree. It would be nice to have also a Iterator interface for the AST, i.e. for jump to next/previous symbol of a special kind. Also information about the caller of a symbol would be nice (I don't know if that is already part of the compiler manager interface). I'm interested in code visualization and refactoring, so this all would be nice to have :-)) BTW: My host system will be Squeak ... greetings Hans Am 20.01.2004 um 11:32 schrieb Simon Marlow: On Mon, 2004-01-19 at 11:34, Simon Marlow wrote: For the Visual Studio plugin we're going to need to talk to GHCi. We plan to do this by designing an appropriate API for GHCi and calling it directly; you *could* do it by talking over a pipe, but it's going to be a lot of work (and slow). If you want to do this, please talk to us about what API you'd like to see, and we can hopefully implement something that will be generally useful. I wanted something like that for a Haskell IDE I was working on (not much progress on it at the moment, but I may pick it up again). The main things I wanted was enough information to be able to implement jump to definition. Where you select a symbol in your editor and move to where that variable/function/type/class was defined, in the same module or another module. It would also be useful to find out the module and package a symbol comes from so that an IDE could have a good stab at finding some documentation. For that, you'd want an API for wandering through the useful information in .hi files. An API corresponding to hugs/ghci's :info name, :browse modname, :type name would be a good start. You'd want to be able to specify which root module to load up the symbols for, optionally specifing a search path and expect it to also load up the .hi files for any imported modules. This is all stuff that we need for Visual Studio too. VS will typecheck your program as you type, so you'll get errors underlined in the source code. A side effect of this is that it will collect all the information reuqired to implement jump to definition and tell me the type of this identifier in the editor. My plan is to have an API where you can request a :load of a module source (perhaps omitting the code generation steps for speed) and then request information about the module, by source location (GHC now has completely accurate source location information in its abstract datatype; we did this recently in order to support the Visual Studio work). The API will most likely be a derivative of the existing compilation manager interface: see ghc/compiler/compMan/CompManager.lhs. Cheers, Simon ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: Talking with the compiler
Hi, Am 18.01.2004 um 11:31 schrieb Ketil Malde: [EMAIL PROTECTED] (Hans Nikolaus Beck) writes: in order to build a programming environement, it would be nice to ask the GHC about symbols etc found in a given Haskell program. I suppose a programming environment could talk to GHCi (which provides commands like :type, :info, :browse to explore the currently defined symbols)? I've look shortly at the GHCi documentation. So I think it would be possible to include a GHC engine into a IDE application by redirecting input and output from GHCi to pipes (I rembemer that emacs used something similar for doing it's compile stuff). But that's hardcore UNIX, I've forgot how to do that :-((( Greetings Hans -kzm -- If I haven't seen further, it is by standing in the footprints of giants ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Talking with the compiler
Hi, in order to build a programming environement, it would be nice to ask the GHC about symbols etc found in a given Haskell program. I've read that GHC has a interface, which was originally intended to plug in other backends. But I've never found a detailed description or API Can someone help me ? Thanks Hans ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: Talking with the compiler
Hi, thank you, it's seems very helpful :-)) Greetings Hans Am 18.01.2004 um 00:31 schrieb Donald Bruce Stewart: HNBeck: Hi, in order to build a programming environement, it would be nice to ask the GHC about symbols etc found in a given Haskell program. I've read that GHC has a interface, which was originally intended to plug in other backends. But I've never found a detailed description or API Can someone help me ? Perhaps you are talking about the external Core interface. Documentation for that is here: http://www.haskell.org/ghc/docs/latest/html/users_guide/ext-core.html Also, there are many -ddump-xxx options, that can give you very useful information, at any level of the compiler. Info for that is here: http://www.haskell.org/ghc/docs/latest/html/users_guide/flag- reference.html#AEN6775 Cheers, Don ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
XCode and GHC on MacOs X
Hi, Could the XCode Tool from Mac Os X Panther be forced to use ghc instead of gcc ? I've found no option to do so, help says nothing about switching a compiler... Greetings Hans ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Compiling HOpenGL Examples with GHC 6.2 Mac OS
Hi, as far as I understand now, for my compiliing problem (see last past with same subject) I must do ghc -package OpenGL -package GLUT --make Cube.hs and in the code doing import OpenGL import GLUT Right so far ? But it seems that the package description in the GHC 6.2 distribution is not right for this packages (OpenGL and GLUT), for both the directory $(InstallDir)/Graphics/Rendering and $(InstallDir)/Graphics/UI is used .??? Greetings Hans ___ Glasgow-haskell-users mailing list [EMAIL PROTECTED] http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
