Such renaming is part of the LSP protocol, so any LSP supporting editor (Emacs, nvim, etc.) will support this as long as the used language server does. I can do

Such renaming is part of the LSP protocol, so any LSP supporting editor (Emacs, nvim, etc.) will support this as long as the used language server does. I can do this with clangd and Emacs, but it's not Emacs specific anymore. There may still be some gap with some very advanced integrated IDE support, but the LSP ecosystem is still evolving and getting there. Which is not a surprise as Microsoft designed it for VS Code. The difference now is not so much between an IDE and a given editor, but between and IDE built-in language support and LSP servers for a given language. For C/C++ the progress of clangd is real over a few years, and it's very usable now.