How to highlight “constexpr” in cc-mode?

Question

Question

Pretty straightforward: How to highlight constexpr in cc-mode (editing C++ code)?

Example

If I use const as in the following example

const double = 3.14

const gets highlighted as a keyword⁽¹⁾ (i.e., in pink), while if I write

constexpr double = 3.14

constexpr gets highlighted as all-faces (i.e., no highlighting at all).

Ideally, a simple solution like writing

(add-to-keywords "constexpr") ;; pseudo-code

in my .emacs without tinkering with the code of cc-mode would be the best for me.

Addendum

This question might be related: Change the way CC-mode font-lock the C++11 auto syntax.

Note

^{(1) I think that it is a keyword because placing the pointer on the word and doing M-x customize-face RET I get: Customize face (default ``font-lock-keyword-face'): and pressing RET I get redirected to the “Easy Customization” wizard.}

Answer 1

The incantation you want is:

(font-lock-add-keywords 'c++-mode
                        '(("constexpr" . 'font-lock-keyword-face)))