Re: C syntax, and spurious semicolons

On Mon, Feb 21, 2011 at 5:18 PM, Ben Schmidt <mail_ben_schmidt@yahoo.com.au> wrote:

On Mon, Feb 21, 2011 at 4:56 PM, Ben Schmidt <mail_ben_schmidt@yahoo.com.au

<mailto:mail_ben_schmidt@yahoo.com.au>> wrote:

       If you only concern about the semicolon after if statements,
       you can try add following to your vimrc file:

       autocmd BufEnter *.c match Grp_semi /if\s*(.\+)\s*;/
       highlight Grp_semi guibg=red

       This will highlight the if statement with red background if he put
       semicolon after
       a if statement.


   Except it will also catch things like this:

   if (whatever) something();

   which you almost certainly don't want, and why I didn't suggest this
   kind of approach.

Yes, we can change it to this:

autocmd BufEnter *.c match Grp_semi /if\s*([^)]\+)\s*;/
highlight Grp_semi guibg=red

Which will then not work on something like this:

if ((ch=getchar())==EOF) ;

(or anything with nested parentheses).

It seems it's not easy to find a simple way to match all the case.

Maybe use following is fine, it will give false warning if use write 2 statements in the same line .

autocmd BufEnter *.c match Grp_semi /if\s*(.\+)\s*;/

highlight Grp_semi guibg=red

Michael

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