Awesome

vim-cpp-modern: Enhanced C and C++ syntax highlighting

Keyword and regex-based syntax highlighting for C and C++11/14/17/20/23 in Vim.

The syntax files provide highlighting of:

Common ANSI C keywords
C++ Standard Library namespaces, types, helper types, helper template variables, and constants
C++11 attributes
Latest C++20 language features like coroutines and concepts
Function declarations/definitions and function calls (basically all words followed by an opening parenthesis)
Optionally a simpler (less colorful) highlighting of standard C and C++ keywords

out Code snippet from cppreference (left: default syntax file, right: this plugin).

Difference to vim-cpp-enhanced-highlight

Both syntax files are based on vim-cpp-enhanced-highlight with the following modifications:

The C++ keywords virtual, override, final, inline, explicit and export are standard C++ statements and not types and are therefore highlighted using the highlight group Statement.
Highlighting of library functions is purely regex-based.
User-defined function templates, class names in declarations, and class scopes are not highlighted. Their regex'es are too complicated and slow, and fail too often.

Optional features

" Disable function highlighting (affects both C and C++ files)
let g:cpp_function_highlight = 0

" Enable highlighting of C++11 attributes
let g:cpp_attributes_highlight = 1

" Highlight struct/class member variables (affects both C and C++ files)
let g:cpp_member_highlight = 1

" Put all standard C and C++ keywords under Vim's highlight group 'Statement'
" (affects both C and C++ files)
let g:cpp_simple_highlight = 1

The last option changes the highlighting of the following keywords:

C: static, register, auto, volatile, extern, const, inline, __attribute__, restrict, alignas, alignof, static_assert, noreturn, thread_local, struct, union, enum, case, default
C++: class, typename, template, namespace, concept, mutable, constexpr decltype, consteval, constinit

Installation

$ cd ~/.vim/pack/git-plugins/start
$ git clone --depth=1 https://github.com/bfrg/vim-cpp-modern

Note: The directory name git-plugins is arbitrary, you can pick any other name. For more details see :help packages.

License

Distributed under the same terms as Vim itself. See :help license.