[Haskell-cafe] data Color3 a = Color3 !a !a !a

[Daryoush Mehrtash]

Can some one explain what the !a does in this:

data Color3<http://cvs.haskell.org/Hugs/pages/libraries/OpenGL/Graphics-Rendering-OpenGL-GL-VertexSpec.html#t%3AColor3>a
=
Color3<http://cvs.haskell.org/Hugs/pages/libraries/OpenGL/Graphics-Rendering-OpenGL-GL-VertexSpec.html#v%3AColor3>!a
!a !a

http://cvs.haskell.org/Hugs/pages/libraries/OpenGL/Graphics-Rendering-OpenGL-GL-VertexSpec.html#t%3AColor3

Thanks,

Daryoush
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