[clean-list] FunctionType question

[Jigang Sun]

I have a simple Start module

module try		
sub :: Int Int -> Int Int 
sub x y = x 3

Start =  (sub)  12 23

When I try to run it--
Parse error [try.icl,2;23,Type]: ordinary type variable expected

If I change it to--
module try
sub :: Int Int ->(Int Int) 
sub x y =( x 3 )

Start =  (sub)  12 23

When I tried to run it, 
Parse error [try.icl,2;23,Type]: ordinary type variable expected

According to the following grammar, "Int Int" is correct Type syntax, "(Int Int)" is Type Expression syntax, hence a Type.
 
FunctionType = [Type -> ] Type [ClassContext] [UnqTypeUnEqualities]

Type = {BrackType}+
BrackType = [UniversalQuantVariables] [Strict] [UnqTypeAttrib] TypeExpression

Type Expression = TypeVariable // see A.7
| (Type)
| PredefinedType
...

PredefinedType = BasicType
| ListType
...

BasicType = Int
| Real
| Char

Many thanks.
Jigang





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