More Details on C, CH, CHILL, and CHANGELOG Syntax Highlighting

disable them use `:unlet`. Example: > :unlet c_comment_strings Setting the value to zero doesn't work! An alternative is to switch to the C++ highlighting: > :set filetype=cpp Variable Highlight ~ *c_gnu* GNU gcc specific items *c_comment_strings* strings and numbers inside a comment *c_space_errors* trailing white space and spaces before a <Tab> *c_no_trail_space_error* ... but no trailing spaces *c_no_tab_space_error* ... but no spaces before a <Tab> *c_no_bracket_error* don't highlight {}; inside [] as errors *c_no_curly_error* don't highlight {}; inside [] and () as errors; ...except { and } in first column Default is to highlight them, otherwise you can't spot a missing ")". *c_curly_error* highlight a missing } by finding all pairs; this forces syncing from the start of the file, can be slow *c_no_ansi* don't do standard ANSI types and constants *c_ansi_typedefs* ... but do standard ANSI types *c_ansi_constants* ... but do standard ANSI constants *c_no_utf* don't highlight \u and \U in strings *c_syntax_for_h* for `*.h` files use C syntax instead of C++ and use objc syntax instead of objcpp *c_no_if0* don't highlight "#if 0" blocks as comments *c_no_cformat* don't highlight %-formats in strings *c_no_c99* don't highlight C99 standard items *c_no_c11* don't highlight C11 standard items *c_no_c23* don't highlight C23 standard items *c_no_bsd* don't highlight BSD specific types *c_functions* highlight function calls and definitions *c_function_pointers* highlight function pointers definitions When 'foldmethod' is set to "syntax" then `/* */` comments and { } blocks will become a fold. If you don't want comments to become a fold use: > :let c_no_comment_fold = 1 "#if 0" blocks are also folded, unless: > :let c_no_if0_fold = 1 If you notice highlighting errors while scrolling backwards, which are fixed when redrawing with CTRL-L, try setting the "c_minlines" internal variable to a larger number: > :let c_minlines = 100 This will make the syntax synchronization start 100 lines before the first displayed line. The default value is 50 (15 when c_no_if0 is set). The disadvantage of using a larger number is that redrawing can become slow. When using the "#if 0" / "#endif" comment highlighting, notice that this only works when the "#if 0" is within "c_minlines" from the top of the window. If you have a long "#if 0" construct it will not be highlighted correctly. To match extra items in comments, use the cCommentGroup cluster. Example: > :au Syntax c call MyCadd() :function MyCadd() : syn keyword cMyItem contained Ni : syn cluster cCommentGroup add=cMyItem : hi link cMyItem Title :endfun ANSI constants will be highlighted with the "cConstant" group. This includes "NULL", "SIG_IGN" and others. But not "TRUE", for example, because this is not in the ANSI standard. If you find this confusing, remove the cConstant highlighting: > :hi link cConstant NONE If you see '{' and '}' highlighted as an error where they are OK, reset the highlighting for cErrInParen and cErrInBracket. If you want to use folding in your C files, you can add these lines in a file in the "after" directory in 'runtimepath'. For Unix this would be ~/.config/nvim/after/syntax/c.vim. > syn sync fromstart set foldmethod=syntax CH *ch.vim* *ft-ch-syntax* C/C++ interpreter. Ch has similar syntax highlighting to C and builds upon the C syntax file. See |c.vim| for all the settings that are available for C. By setting a variable you can tell Vim to use Ch syntax for `*.h` files, instead of C or C++: > :let ch_syntax_for_h = 1 CHILL *chill.vim* *ft-chill-syntax* Chill syntax highlighting is similar to C. See |c.vim| for all the settings that are available. Additionally there is: chill_space_errors like c_space_errors chill_comment_string like c_comment_strings chill_minlines like c_minlines CHANGELOG *changelog.vim* *ft-changelog-syntax* ChangeLog supports highlighting

This section continues detailing syntax highlighting in Vim. It lists further optional highlighting features for C, including options for UTF characters, using C syntax for `.h` files, hiding #if 0 blocks, format specifiers, C99/C11/C23 standard items, BSD-specific types, function calls/definitions, and function pointers. It also covers folding options and addresses potential highlighting errors during backward scrolling. The section explains how to match extra items in comments and customize ANSI constant highlighting. Furthermore, it describes CH syntax highlighting, which builds upon C syntax. CHILL syntax highlighting is also similar to C, with additional options. Finally, CHANGELOG syntax highlighting is mentioned.