Open Declarations

An open declaration lets you reference the elements of a module or namespace without a fully qualified name. Open imports a namespace or module, OpenType imports a type's static members, and OpenGlobal opens from the root with the global specifier.

Contents

• Opening Namespaces and Modules
• Opening a Type
• Global Opens

#r "../../src/Fabulous.AST/bin/Release/netstandard2.1/publish/Fantomas.Core.dll"
#r "../../src/Fabulous.AST/bin/Release/netstandard2.1/publish/Fabulous.AST.dll"
#r "../../src/Fabulous.AST/bin/Release/netstandard2.1/publish/Fantomas.FCS.dll"

open Fabulous.AST
open type Fabulous.AST.Ast

Opening Namespaces and Modules

Pass a single name or a list of path segments:

Oak() {
    AnonymousModule() {
        Open("Fabulous.AST")

        Open([ "System"; "IO" ])
    }
}
|> Gen.mkOak
|> Gen.run
|> printfn "%s"

// produces the following code:

open Fabulous.AST
open System.IO

Opening a Type

OpenType exposes the accessible static members and fields of a type:

Oak() { AnonymousModule() { OpenType([ "System.Math" ]) } }
|> Gen.mkOak
|> Gen.run
|> printfn "%s"

// produces the following code:

open type System.Math

Global Opens

OpenGlobal opens from the root path only, emitting the global specifier:

Oak() {
    AnonymousModule() {
        OpenGlobal("A")

        OpenGlobal([ "A"; "B" ])
    }
}
|> Gen.mkOak
|> Gen.run
|> printfn "%s"

// produces the following code:

open global.A
open global.A.B