Re: [Tinycc-devel] Warning if no break between two case ?

[Peter Lund]

On Sat, 2007-10-06 at 17:37 +0800, ShangHongzhang 62185 wrote:
> How to output a warning if there is no any 'break' statement between two 
> 'case' statements?
> 
> for example:
> 
> switch (a)
> {
>    case 1:
>       ... // there is no break, I want TCC to show some warning in this case
>    case 2:
>       ...
>       break;
> }
> 
> So, what could I do to achieve this?

You often don't want a warning.

It is also hard work to create a warning isn't too trigger-happy.
Consider:

switch (a) {
case 1:
  if (a)
     return 8;
  else
     return 9;

case 2:
  xx();
  do {
    ...
    if (...)
      goto common;
    ...
  } while (1);

case 3:
  ...
  longjmp(...);

case 4:
  ...
}

-Peter