Functions with out parameters are treated as tuple types with the return type so you could use your example like so:
let (result, result_of_b_param) = function 3
let (result, int_value) = Int32.TryParse "3"
match Int32.TryParse "23" with
| (true, x) -> ...
| _ -> ...
That's ok, but is there any way to declare such a funciton?
That's ok, but is there any way to declare such a funciton?
You can use the the attribute System.Runtime.InteropServices.OutAttribute on function parameters:
open System.Runtime.InteropServices
type foo () =
member x.Foo ([<Out>] y : int32 ref) =
y := 0
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Hello, group
F# seems a very interesting language. i am comparing F# with C#.
Is that possible to do something like C#: bool function(int a, out int b), i can get some value out?
Thanks.