Experimental capabilities should be defined on the capabilities.experimental object

[rchl]

Currently the extension extends textDocument.completion capability object to add the editsNearCursor capability:

vscode-clangd/src/clangd-context.ts

Lines 51 to 53 in 0c2d40d

	const extendedCompletionCapabilities: any =
	capabilities.textDocument?.completion;
	extendedCompletionCapabilities.editsNearCursor = true;

This is what the spec says about extending capabilities with experimental features.

ClientCapabilities define capabilities for dynamic registration, workspace and text document features the client supports. The experimental can be used to pass experimental capabilities under development.

Note the last sense which says that experimental features should be registered within the capabilities.experimental object.

This is problematic for Sublime Text LSP client which currently only allows client handlers to extend the experimental capabilities.

[HighCommander4]

We should be able to make a server change to also check for editsNearCursor under capabilities.experimental. Could you file a server issue about that?

[rchl]

clangd/clangd#2201