Re: upcoming changes in Lua 5.2

["Leo Razoumov" <slonik.az@...>]

On 2/27/08, Alexander Gladysh <agladysh@gmail.com> wrote:
> >  >  for (int i = 0; i < 10; ++i)
>  >  >  {
>  >  >   if (i % 2)
>  >  >   {
>  >  >     continue;
>  >  >   }
>  >  >   printf("odd %d", i);
>  >  >  }
>  >  >
>  >  >  I treat continue in the first example as an another exit from the loop
>  >  >  iteration.
>  >
>  >  No it is not! The only exit point from the "for" loop above is the
>  >  condition "i<10".
>  >  "continue" simply causes to skip printf statement.
>
>
> The only exit point from the *loop* is the condition "i < 10".
>  But continue is an extra exit point from a *single iteration* of the
>  loop -- that is, the code between its {}.
>

An "exit point" is defined  as a point in the program that leaves
certain scope such as function, loop, switch statement, etc. In C/C++
"return", "break", "goto" qualify as such but "continue" generally
does not. In your example "continue" does leave the scope of
"if"-statement but not the "for" loop.

--Leo--
(my last post on this topic)