On 10/21/2012 07:04 PM, David Snider wrote:
What I'm trying to figure out is why I have to put an explicit type here:

fun checkPassword (r : {Email : string, Password : string}) =

instead of just using:
fun checkPassword r =

The reason is that the annotation-free version is ambiguous and doesn't uniquely determine the type of the function. All functions must have uniquely determined types in Ur.

Presumably you want to call [checkPassword] from other modules, so you'd want to include a declaration for it in the .urs file, anyway, in which case the annotation in the .ur file is unnecessary.

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