f#

As I know, explicit type parameters in value definitions is a one way to overcome "value restriction" problem. Is there another cases when I need to use them? Upd : I mean "explicitly generic constructs", where type parameter is enclosed in angle brackets, i.e. let f<'T> x = x This would likely be rare, but when you want to prevent further generalization (§14.6.7): Explicit type parameter definitions on value and member definitions can affect the process of type inference and generalization. In particular, a declaration that includes explicit generic parameters will not be generalized beyond

I have imported a vector math library, and would like to add my own (*) and (+) operators while preserving the existing operators for basic int and float. I have tried the following: let inline (*) (x : float) (y : Vector) = y.Multiply(x) let inline (*) (x : Vector) (y : float) = x.Multiply(y) let inline (+) (x : Vector) (y : Vector) = x.Add(y) Which has two problems: It seems to remove int + int and int * int , and The 2nd line (which is intended to complete commutativity) does not compile because it is a "duplicate definition". How can I go about defining some commutative operators on my

In a .fs file a newline is denoted by \r\n , but in the F# Interactive window it is \n . In a problem I'm currently trying to solve, the length of a multiple line literal string matters. So a problem arises when I am testing code in the F# Interactive window, because the length of the string is different from in normal execution. I hope there is an option to change the newline 'character' in F# Interactive to \r\n , but I can't find it. Does anyone know where I can achieve this, or some other workaround? You can use conditional compilation to handle this: #if INTERACTIVE text.Replace("\n",

Normal F# Discriminated Unions are reference types. How can I create a simple (non-recursive and with only value-type fields) union type in F# that is a value type? Based on some internet searching my current (non-working) attempt looks as follows: [<StructLayout(LayoutKind.Explicit)>] type Float = [<DefaultValue>] [<FieldOffset 0>] val mutable Val1 : float [<DefaultValue>] [<FieldOffset 0>] val mutable Int1 : int new (a:float) = {Val1 = a} The following blog post appears to show what is possible via C# I'm aware that the above is NOT idiomatic use of F# but I am trying to optimize the

Visual Studio's Edit and Continue and other IDE's equivalent operations are very effective for experimentation in interactive applications, since you don't have to restart the app to see the effects of the code change (most of the time). If Visual Studio already supports this for C#, then why isn't it in F# yet? Does something about F# make it more difficult? It boils down to the fact that this kind of feature needs support in the compiler itself, and since the F# compiler has a much smaller team working on it than the C# compiler, they probably have other, higher priority items to work on. 来源