Execute functions during snippet expansion

• VSCode Version: 1.4
• OS Version: any

There are several snippets that exist in Visual Studio today that I would like to introduce to the C# extension for VS Code, but require generating dynamic text are executing code to perform other actions during snippet expansion. For example:

• ctor – generate a constructor declaration, automatically filling in the name of the constructor with the enclosing type name.
• testclass – generate a test class and adds references to necessary test assemblies.
• cw – generate System.Console.WriteLine() but simplify the type name with the current using directives. So, System. is removed if using System; is in scope.

From what I can tell, snippets only support text with placeholders today. Is it possible to generate text dynamically or execute commands with arguments during snippet expansion?

[jrieken]

We could do something like textmate interpolated shell code but for vscode commands. For instance a snippet would look like this

constructor `commandThatReturnsCtorName`(`commandThatReturnsCtorArgs`) {
  $1
}

When inserting such a snippet we identify the command references and replace them with whatever their execution returned (executeCommand). As arguments we could pass the document, position, and snippet

[WellspringCS]

So… if I type ctor and get public ClassName(Parameters)… That’s still the expected behavior, if not perhaps the desired behavior?

From the two threads I’ve skimmed, seems the requested feature has not been implemented yet? I thought it was my VSCode editor performing sub-optimally, but now I think I’m just wishing for a feature others requested three years ago.