[LLVMbugs] [Bug 18877] No -Wempty-body warning for empty body with a prefix label

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Tue Feb 18 11:26:10 PST 2014


Chengnian Sun <chengniansun at gmail.com> changed:

           What    |Removed                     |Added
             Status|RESOLVED                    |REOPENED
         Resolution|INVALID                     |---

--- Comment #2 from Chengnian Sun <chengniansun at gmail.com> ---
(In reply to comment #1)
> Right. This warning is to detect the 'stray semicolon' bug:
>   if (foo);
>     blah;
> The labelled semicolon case doesn't match this pattern.

Hi Richard, 

Thanks. I understand why it is not warned, but I do not understand why the
given test case with an empty body does not fit into -Wempty-body. 

The pattern makes sense, but is it a little conservative? For the if statement
"if (i) a:;", the programmer cannot easily find out that it is an empty
statement due to the labelled semicolon, which is equally bad to the stray

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