Support more code snippets

[kuhlenh]

Filing on behalf of a customer who wants to be able to have postfix templates and custom templates (similar to ReSharper live templates).

Examples:

• .var
• .foreach
• "My own custom templates, e.g. I have a "ref" template for quick insertion of types in xmldoc: "

We have some of these with snippets, but I don't think we have all of them and our customization story isn't great. Also need to make sure we document all of these...

[kuhlenh]

I have some more concrete info here:

• let's confirm that code snippets use the code styles configured in Tools>Options or .editorconfig (e.g., 'var' preferences)
• in the 'foreach' snippet, we cycle through: type of element, name of element, enumerable. We may be able to offer a better experience by starting at the enumerable (allowing IntelliSense to work for the rest).
• we can integrate our "smart variable name suggestions" into code snippets

[zarenner]

I'd like code snippets to be able to guess expected generic types, similar to e.g. this simple ReSharper live template example that automatically figures out T when emitting a Moq It.IsAny<T>() snippet.

[kuhlenh]

Things to also consider:

• organize snippets by file type in the Snippet Manager
• show a preview of what the snippet does in the Snippet Manager
• show the snippet name in the Snippet Manager (rather than friendly name)
• improve Snippet Editor to make it easy to order parameters, highlight parameters, and apply different code style rules (naming conventions)

[alrz]

.var .foreach

.if .typeof .default .null (null check) .switch .using .ret (return) .assert (Debug.Assert) .block (surround) .cast (direct cast) .new .await

[MarkusAmshove]

.null .notnull .nameof

[alrz]

This will have a huge impact on editing experience though it's low pri, it seems. I use .var and .foreach in Rider all the time and it's really helpful.

[CyrusNajmabadi]

Can you describe how the particular snippets work? In particular, it may not be enough to just include them, we may need to update the existing snippet infrastructure to support functionality it doesn't currently have

[alrz]

For instance, (expression).var [enter] is exactly the same as selecting the expression and "introduce local". So yeah I think it's actually more involved than "snippets" feature we have today.

For .var Rider even ask if you want to replace this one occurrence or all of them.

That said, I think "custom suffix snippets" should be separated out from the others.

[alrz]

@CyrusNajmabadi Do we have the infrastructure required for this? I think we need something like CompletionProvider but with the ability to change the whole Document

[LunicLynx]

Any progress on this?