class & function names highlighting in Vim

Question

I just recently set up my Vim environment from Textmate, after becoming addicted to its modal input.

However, syntax highlighting seems to be not so beautiful in Vim. I code in C++ and since the function call and class names can't be highlighted, the code is more difficult to read. I played with color scheme for a bit, but couldn't find any field that corresponded to "class name" or "function name".

In the picture below, notice how DroughtLayer:: and *.size() is not highlighted on the right in MacVim.

_{(source: ivzhao.com)}

Any ideas how to solve this? It really annoys me as I am so much a visual-sensitive guy.

Answer 1

I had this very same problem when I started using vim. The solution is simple, you just have to edit the c syntax file used by vim, here's how to do it:

When you start editing a C or C++ file, vim reads the default c syntax file located in

$VIMRUNTIME/syntax/c.vim 

(Where $VIMRUNTIME is where you have vim installed. You can find out it's default value by opening vim and using the command ":echo $VIMRUNTIME").

You can simply overwrite that file, or you can create your custom C syntax file (which will be loaded by vim instead of the default one) in this location:

$HOME/.vim/syntax/c.vim      (for UNIX) $HOME/vimfiles/syntax/c.vim  (for PC or OS/2) 

(I have never used a Mac so I don't know which one will work for you. You can find out more in the vim help, ":help vimfiles")

Now the fun part. Copy the default "$VIMRUNTIME/syntax/c.vim" file to your vimfiles directory ("$HOME/.vim/syntax/c.vim" for UNIX), and edit it by adding these lines:

" Highlight Class and Function names syn match    cCustomParen    "(" contains=cParen,cCppParen syn match    cCustomFunc     "\w\+\s*(" contains=cCustomParen syn match    cCustomScope    "::" syn match    cCustomClass    "\w\+\s*::" contains=cCustomScope  hi def link cCustomFunc  Function hi def link cCustomClass Function 

That's it! Now functions and class names will be highlighted with the color defined in the "Function" highlight (":hi Function"). If you want to customize colors, you can change the last two lines above to something like this:

hi def cCustomFunc  gui=bold guifg=yellowgreen hi def cCustomClass gui=reverse guifg=#00FF00 

or you can leave the C syntax file alone and define colors in your vimrc file (":help vimrc"):

hi cCustomFunc  gui=bold guifg=yellowgreen hi cCustomClass gui=reverse guifg=#00FF00 

(Note the absence of the "def" keyword, go to ":help highlight-default" for details). For the available parameters to the ":hi" command see ":help :highlight".

You can find the complete c.vim file for Vim 7.2 on this link (Note: only use this if you have a non-modified Vim, version 7.2):

http://pastebin.com/f33aeab77

And the obligatory screenshot:

Answer 2

this is my first post here and i didn't know how to make an observation, the answer of Eduardo makes "(" and "{" look unmached and bugs syntax foldind, I changed it a little to fix this.

syn match    cCustomParen    "?=(" contains=cParen,cCppParen syn match    cCustomFunc     "\w\+\s*(\@=" contains=cCustomParen syn match    cCustomScope    "::" syn match    cCustomClass    "\w\+\s*::" contains=cCustomScope hi def cCustomFunc  gui=bold guifg=yellowgreen hi def link cCustomClass Function