neovim/runtime/ftplugin/c.lua

-- These are the default option values in Vim, but not in Nvim, so must be set explicitly.
vim.bo.commentstring = '/*%s*/'
vim.bo.define = '^\\s*#\\s*define'
vim.bo.include = '^\\s*#\\s*include'

if vim.fn.isdirectory('/usr/include') == 1 then
  vim.cmd([[
    setlocal path^=/usr/include
    setlocal path-=.
    setlocal path^=.
  ]])
end

vim.b.undo_ftplugin = vim.b.undo_ftplugin .. '|setl path<'
refactor(defaults): do not use C specific default values for options (#22500) The options 'path', 'include', and 'define' all use C-specific default values. This may have made sense a long time ago when Vim was mostly used just for writing C, but this is no longer the case, and we have ample support for filetype specific configuration. Make the default values of these options empty and move the C-specific values into a filetype plugin where they belong. Co-authored-by: zeertzjq <zeertzjq@outlook.com> 2023-06-06 09:26:29 -07:00			`-- These are the default option values in Vim, but not in Nvim, so must be set explicitly.`
refactor(defaults)!: change default 'commentstring' value to empty (#22862) 2023-04-02 08:01:48 -07:00			`vim.bo.commentstring = '/%s/'`
refactor(defaults): do not use C specific default values for options (#22500) The options 'path', 'include', and 'define' all use C-specific default values. This may have made sense a long time ago when Vim was mostly used just for writing C, but this is no longer the case, and we have ample support for filetype specific configuration. Make the default values of these options empty and move the C-specific values into a filetype plugin where they belong. Co-authored-by: zeertzjq <zeertzjq@outlook.com> 2023-06-06 09:26:29 -07:00			`vim.bo.define = '^\\s#\\sdefine'`
			`vim.bo.include = '^\\s#\\sinclude'`

			`if vim.fn.isdirectory('/usr/include') == 1 then`
			`vim.cmd([[`
			`setlocal path^=/usr/include`
			`setlocal path-=.`
			`setlocal path^=.`
			`]])`
			`end`

			`vim.b.undo_ftplugin = vim.b.undo_ftplugin .. '\|setl path<'`