[Bug c/42795] false "statement has no effect" message

[pinskia at gcc dot gnu dot org]

------- Comment #4 from pinskia at gcc dot gnu dot org  2010-01-19 03:01 -------
(In reply to comment #3)
> So setting a variable as the coder desires is no effect? Some would disagree.
> 
> A statement that really would not have an effect would be:
> 
> if (theworldis > notenough);


No that is not is being warned about.  The statement that is being warned about
is just "i;"  which is the same inside a for statement as it is outside one. 
Both are statements have no effect as it does nothing.

Take:
void f(int i)
{
 i;
}

Do you think that should be warned about?  That is the exact same thing which
is being warned about when you have:

void f(int i)
{
 for(i; .... ; ....)
....
}


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42795