SourceKit-lsp does not trigger C/C++ completion suggestions on "." or "->" #27
Description
Problem is examined on:
- Nova: 13.3 Build 730158
- Icarus: 3.0
- sourcekit-lsp: using the version bundled with XCode
- macOS: Sequoia 15.7.2 (24G325)
- XCode: 26.1.1 (17B100)
The title pretty much sums it up - I'm using icarus and the sourcekit-lsp and while editing files in a C++ project I do not get a completion popup if I use . or -> to access methods / members of an object.
Once I start typing any extra letters after the . or -> I do receive a completion popup filtered based on the letter(s) I already typed. This is very cumbersome and I also don't want to have to explicitly toggle completions via the menu shortcut.
If I go to the settings and instead specify /usr/bin/clangd as my LSP I'm limited to C/C++ but I receive a completion popup immediately after typing . or ->.
Looking at the suggestions it also seems as if sourcekit-lsp is always one character behind the contents of my buffer (which might explain why a single . or -> wouldn't trigger anything - the dot isn't in the LSP yet and the dash from -> isn't any reason to trigger completions yet).
See this screenshot as an example of the one-letter-behind phenomenon:
