Monday, February 21, 2011

Re: C syntax, and spurious semicolons

On Feb 21, 8:23 am, Hugh Sasse <h...@dmu.ac.uk> wrote:
> I've been assisting a colleague with their C code, and he has
> learned to add semicolons at the end of statements too well.  His
> current favourite mistake is to write
>   if (expression == value);
>   {
>     do_something();
>   };
> I frequently miss the trailing semicolon on the first line.   So I
> was wondering if it would make sense to modify the C syntax file to
> highlight
>    if (expr);
> such that the semicolon shows up as an error.  Clearly it is a legal
> null statement, and so is syntactically correct.  But if one only
> wanted the expr for its side effects, one would not need to put it
> in an if.  To do this because one is only using the else part is
> poor communication with other programmers.  
>
> Is there a good reason not to change the syntax file?  Otherwise,
> can anyone suggest a patch: my skills in this area are suboptimal,
> as I don't change syntax files very often.
>         Thank you
>         Hugh

I tried the pattern search: /);\n{/
It seemed to work. So maybe you can use that for a search.

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