Run Swift Script command doesn't work on Windows

[svanimpe]

The "swift: Run Swift Script" command doesn't work on Windows, as is to be expected.
It shows the same error as when running swift file.swift on the command line:

<unknown>:0: error: could not load the swift standard library

Environment: Swift 5.7 on Windows 11

[stevapple]

Seems to duplicate #416 (comment)?

It should be a Swift Driver bug which is pure toolchain-related. Once the Swift Driver bug is fixed, we should be able to use the feature.

[dharmatech]

Also running into the same issue.

I can run swiftc successfully at a PowerShell prompt:

However, if I use the Run Swift Script command in vscode, I get the following:

I noticed the following settings:

I tried setting the SDK to:

C:\Library\Developer\Platforms\Windows.platform\Developer\SDKs\Windows.sdk

and the Runtime Path to:

C:\Library\Developer\Platforms\Windows.platform\Developer\SDKs\Windows.sdk\usr\lib\swift\windows

and

C:\Library\Developer\Platforms\Windows.platform\Developer\SDKs\Windows.sdk\usr\lib\swift

however, setting those don't appear to resolve the issue.

[adam-fowler]

The last time I looked running swift scripts on Windows was broken ie running swift <file>. @compnerd should be able to give us the latest details on that. Maybe they are fixed in the 5.8 development build.

[compnerd]

No, the underlying issue is LLDB, not Swift. There has been no one who has stepped up to help work on LLDB, so this is still not available.

[dharmatech]

Just wanted to clarify.

Compiling and running

Compiling with swiftc at a PowerShell prompt works fine and the resulting executable works:

Here's the output from evaluating that code:

Running with swift

However, running test.swift directly via swift at a PowerShell prompt

runs into the issue:

Test file

The file test.swift contains:

print("abc")

Comments

Since the same error is occurring at the prompt when using swift directly, it seems as if the issue may not be with vscode-swift, but in some other place.

[compnerd]

@dharmatech correct. swift ... is running the swift file as a script, which runs it through the interpreter, which is using LLDB. swift compiles the code, doesn't interpret it.

[Taschi120]

Do I understand the above comments correctly: Running Swift with LLDB is not currently possible on Windows at all, and Swift code thus cannot be debugged on Windows?

[adam-fowler]

Do I understand the above comments correctly: Running Swift with LLDB is not currently possible on Windows at all, and Swift code thus cannot be debugged on Windows?

No this is about running swift as a script. You can use LLDB to debug Swift executables.