How to enable font lock for functions called by other functions

How to enable font lock for functions called by other functions

[doyoucy]

Hi all,

I noticed that the "Font Lock Function Name Face" just enables the
font lock for function name when I decalare new function. But other
functions called by this outer function don't have any color.

For example:
void foo1()
{
    foo2();
}

The function foo1 has font-lock enabled and function foo2 is just
plain text.
So, is there any options to enable the font lock for inside fuunctions
(foo2)?

I'm using GNU Emacs 22.2.1, thanks!

Re: How to enable font lock for functions called by other functions

[Colin S. Miller]

doyoucy@gmail.com wrote:
> Hi all,
> 
> I noticed that the "Font Lock Function Name Face" just enables the
> font lock for function name when I decalare new function. But other
> functions called by this outer function don't have any color.
> 
> For example:
> void foo1()
> {
>     foo2();
> }
> 
> The function foo1 has font-lock enabled and function foo2 is just
> plain text.
> So, is there any options to enable the font lock for inside fuunctions
> (foo2)?
> 
> I'm using GNU Emacs 22.2.1, thanks!
> 
> 
> 

M-x font-lock-mode
will turn on fontifcation (syntax highlighting) for the current buffer,
assuming there is a syntax table. For most programming modes (including C and C++)
there is.

M-x font-lock-fontify-buffer
will force emacs to refontify the buffer. This normally happens automatically,
but emacs can get confused when you comment out a section of code (or uncomment it).
Emacs will also refuse to automatically fontify large files, this command will force
emacs to do so.

HTH,
Colin S. Miller


-- 
Replace the obvious in my email address with the first three letters of the hostname to reply.

Re: How to enable font lock for functions called by other functions

[Nikolaj Schumacher]

doyoucy@gmail.com wrote:

> For example:
> void foo1()
> {
>     foo2();
> }
>
> The function foo1 has font-lock enabled and function foo2 is just
> plain text.
> So, is there any options to enable the font lock for inside fuunctions
> (foo2)?

You can use the following in your `c-mode-common-hook', though I'm sure
it breaks down in same cases.

(font-lock-add-keywords
   nil `(("\\([[:alpha:]_][[:alnum:]_]*\\)("  1 font-lock-function-name-face)))


regards,
Nikolaj Schumacher

Re: How to enable font lock for functions called by other functions

[doyoucy]

> (font-lock-add-keywords
>    nil `(("\\([[:alpha:]_][[:alnum:]_]*\\)("  1 font-lock-function-name-face)))


Thanks guys!

I think coloring the inner function name is common practice for many
code navigation tools, the code above works, but it also applys
function name face to the keywords like "if" "while".

I'm wondering why emacs don't have an option to enable it.

Re: How to enable font lock for functions called by other functions

[Nikolaj Schumacher]

doyoucy@gmail.com wrote:

>> (font-lock-add-keywords
>>    nil `(("\\([[:alpha:]_][[:alnum:]_]*\\)("  1 font-lock-function-name-face)))
>
> I think coloring the inner function name is common practice for many
> code navigation tools, the code above works, but it also applys
> function name face to the keywords like "if" "while".

I hope I mentioned it was a hack? :)
It works for me, because I put spaces before if and while.

(font-lock-add-keywords
 nil `(("\\([[:alpha:]_][[:alnum:]_]*\\)("
        1 font-lock-function-name-face)) t)

could fix this particular issue.

> I'm wondering why emacs don't have an option to enable it.

Most likely the answer to such questions is:  Because nobody has
implemented it.

Doing it properly would probably require Emacs to parse the language,
which it doesn't.  And hacks such as mine fail on many borderline cases
like operator().



regards,
Nikolaj Schumacher

Re: How to enable font lock for functions called by other functions

[doyoucy]

Nikolaj,

Your hack now works fine for my C code navigaion.

Thanks, Its really helpful!