在 F# 脚本中使用新的包引用语法

Question

According to this Microsoft blog post section, Package references in F# scripts , I should be able to use the following syntax in an fsx script:

#r "nuget: FSharp.Data"

Unfortunately, the compiler gives me the following error:

The package management feature requires language version 5.0 use /langversion:preview F# Compiler(3302)

I believe I have dotnet.core 5.0 installed correctly:

dotnet --info
.NET SDK (reflecting any global.json):
 Version:   5.0.100
 Commit:    5044b93829

Runtime Environment:
 OS Name:     Mac OS X
 OS Version:  11.0
 OS Platform: Darwin
 RID:         osx.11.0-x64
 Base Path:   /usr/local/share/dotnet/sdk/5.0.100/

Host (useful for support):
  Version: 5.0.0
  Commit:  cf258a14b7

.NET SDKs installed:
  5.0.100-rc.1.20452.10 [/usr/local/share/dotnet/sdk]
  5.0.100 [/usr/local/share/dotnet/sdk]

.NET runtimes installed:
  Microsoft.AspNetCore.App 5.0.0-rc.1.20451.17 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.AspNetCore.App 5.0.0 [/usr/local/share/dotnet/shared/Microsoft.AspNetCore.App]
  Microsoft.NETCore.App 5.0.0-rc.1.20451.14 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]
  Microsoft.NETCore.App 5.0.0 [/usr/local/share/dotnet/shared/Microsoft.NETCore.App]

To install additional .NET runtimes or SDKs:
  https://aka.ms/dotnet-downloa

How can I get this working correctly? Currently, the fsx script inside a dotnet core solution if that makes any difference. I'm using vscode with the ionide plugin to write F#.

Answer 1

Ionide 尚不支持 F#5。

Answer 2

As Isaac Abraham pointed out in his answer, the Ionide vscode package, at the time of this post, doesn't support F# 5.0 quite yet. However, the Ionide package helpfully does give the user the ability to enable a preview of F# 5.0 language features.

I fixed this compiler error by opening up the User's settings.json file and adding the following lines:

"FSharp.fsiExtraParameters": [
    "--langversion:preview"
]