What is that syntax used for?
It's a binding expression. From the spec, 6.7.1:
If multiple bindings are used, the variables bound are only in scope in body-expr. For example, the following is
legal:
let x = 1 and y = 2 in x+y
Experimenting, I see it works if 'and' is on a new line indented the same amount as 'let'.
Offhand, I am not sure if this is a bug in the spec or the compiler (most likely this is an intentional change and the spec was not updated in that example).
FSI now uses the "#light" option by default. When using the #light option, each "and" must be placed on a new line.
Thanks
Don
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So I'm new to F# and I've been trying to get various samples to work.
I'm not having a lot of luck with this CTP stuff. One thing is, anything of this form is broken:
> let x = 1 and y = 2 in x+y;;
let x = 1 and y = 2 in x+y;;
----------^^^^
stdin(1,11): error FS0010: Unexpected keyword 'and' in binding. Expected incomplete structured construct at or before this point or other token
What's up with that? Is this a removed language feature?