Re: I'd give my right arm for a continue statement

[Tony Finch <dot@...>]

On Thu, 27 Jan 2011, Sean Conner wrote:
>
> 	x = 0;
> 	do
> 	{
>  	  body1();
> 	  if (x < 30) continue;
> 	  body2();
> 	  x++;
> 	} while(x < 50);
>
> 		x = 0;
> 	CONTINUE:
> 		body1();
> 		if (x < 30) goto CONTINUE;
> 		body2();
> 		x++;
> 		if (x < 50) goto CONTINUE;

No, that should be:

 		x = 0;
 	start:
 		body1();
 		if (x < 30) goto CONTINUE;
 		body2();
 		x++;
	CONTINUE:
 		if (x < 50) goto start;

> If you keep the similar behavior of "continue" in C into Lua, then:

Note that there is a significant difference in the scoping rules between C
and Lua:

	do {
		int i;
	} while (f(i)); // ERROR: i is not in scope

	repeat
		local i
	until f(i) -- ok: i is in scope

And this difference is one of the reasons that the hypothetical `continue`
would be more awkward in Lua than in C.

Tony.
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