Description
When the last F# file doesn't begin with module or namespace declaration, the compilation fails with:
[...]/Program.fs(5,1): (6,1) error FSHARP: Files in libraries or multiple-file applications must begin with a namespace or module declaration, e.g. 'namespace SomeNamespace.SubNamespace' or 'module SomeNamespace.SomeModule'. Only the last source file of an application may omit such a declaration. (code 222)
Repro code
(create directory for testing: mkdir tmp && cd tmp)
dotnet new console -lang f#
dotnet new tool-manifest
dotnet tool install fable
dotnet build
dotnet fable
Fable: F# to JS compiler 3.1.2
Thanks to the contributor! @GordonBGood
.> cmd /C dotnet restore tmp.fsproj
Determining projects to restore...
All projects are up-to-date for restore.
Parsing tmp.fsproj...
Initializing F# compiler...
Compiling tmp.fsproj...
F# compilation finished in 1218ms
[...]/tmp/Program.fs(3,1): (4,1) error FSHARP: Files in libraries or multiple-file applications must begin with a namespace or module declaration, e.g. 'namespace SomeNamespace.SubNamespace' or 'module SomeNamespace.SomeModule'. Only the last source file of an application may omit such a declaration. (code 222)
Compilation failed
Expected and actual results
Expected: should compile -- just like the .NET version.
Actual: compilation error (see output above)
The default code for a new F# project is:
// Learn more about F# at http://docs.microsoft.com/dotnet/fsharp
open System
// Define a function to construct a message to print
let from whom =
sprintf "from %s" whom
[<EntryPoint>]
let main argv =
let message = from "F#" // Call the function
printfn "Hello world %s" message
0 // return an integer exit code-> doesn't begin with namespace or module declaration.
Program.fs is the last (and only) file in the project -> according to the error message it should compile.
Adding module A to the top results in a successful build:
dotnet fable
Fable: F# to JS compiler 3.1.2
Thanks to the contributor! @anchann
.> cmd /C dotnet restore tmp.fsproj
Determining projects to restore...
All projects are up-to-date for restore.
Parsing tmp.fsproj...
Initializing F# compiler...
Compiling tmp.fsproj...
F# compilation finished in 1198ms
Compiled Program.fs
Fable compilation finished in 225ms
Related information
- Fable version:
dotnet fable --version: 3.1.2
- Dotnet version:
dotnet --version: 5.0.102
Description
When the last F# file doesn't begin with module or namespace declaration, the compilation fails with:
Repro code
(create directory for testing:
mkdir tmp && cd tmp)Expected and actual results
Expected: should compile -- just like the .NET version.
Actual: compilation error (see output above)
The default code for a new F# project is:
-> doesn't begin with namespace or module declaration.
Program.fsis the last (and only) file in the project -> according to the error message it should compile.Adding
module Ato the top results in a successful build:Related information
dotnet fable --version: 3.1.2dotnet --version: 5.0.102