change background color for C/C++ "type"

[jlmxyz]

Result from CocInfo

vim version: VIM - Vi IMproved 9.1 9011652
node version: v24.9.0
coc.nvim version: 0.0.82-54079c0 2025-10-13 20:16:26 +0800
coc.nvim directory: /home/XXX/data/conf/vim/plugged/coc.nvim
term: dumb
platform: linux

Describe the bug

the background of keywords when selecting text is different for the keywords compared to other text (it stay as unselected text) in gvim (works in vim)

Reproduce the bug

see #5456

theme tested that create the bug : https://github.com/tomasr/molokai/blob/master/colors/molokai.vim
open C/C++ file in gvim (it works in vim)
select some parts of source code containing "type" keyword (class names, uint* etc)

Screenshots (optional)

see #5456 for screenshot

[fannheyward]

coc.nvim supports semanticToken highlighting. Move your cursor on the keyword, run :CocCommand semanticTokens.inspect, coc.nvim will display the highlight group name. If no information is displayed, it means that clangd didn't provide semantic token highlighting for this keyword.

[jlmxyz]

[jlmxyz]

don't know if it's related but I have theses errors on gvim startup :

Error detected while processing /home/XXX/data/conf/vim/gvimrc[7]..ColorScheme Autocommands for "*":
E117: Unknown function: InitHighlight

tried grep ~/.vim for InitHighlight, didn't found anything, the gvimrc[7] line is :colorscheme monokai

[fannheyward]

Unknown function: InitHighlight

The InitHighlight function wasn't came from coc.nvim.

From your screenshot, the u8stirng_view keyword already has highlight group. I'm a bit confused now, what's the problem or your question that background color for C/C++ "type", which type keyword?

[jlmxyz]

the issue is that when selecting the "CocSemTypeClass" keyword, the background don't change (see initial screenshot) as if it was forced by something
the keyword is highlighted if no selection with right color and right background,
when selecting, the foreground color stay correct, but the background don't change