How to write this correct...

[Hans Nikolaus Beck]

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



-------------- next part --------------
A non-text attachment was scrubbed...
Name: not available
Type: text/enriched
Size: 518 bytes
Desc: not available
Url : http://www.haskell.org//pipermail/glasgow-haskell-users/attachments/20040222/bde37b41/attachment.bin