Re: I'd give my right arm for a continue statement
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- Subject: Re: I'd give my right arm for a continue statement
- From: Tony Finch <dot@...>
- Date: 2011年1月28日 19:29:51 +0000
On 2011年1月27日, 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.
--
f.anthony.n.finch <dot@dotat.at> http://dotat.at/
HUMBER THAMES DOVER WIGHT PORTLAND: NORTH BACKING WEST OR NORTHWEST, 5 TO 7,
DECREASING 4 OR 5, OCCASIONALLY 6 LATER IN HUMBER AND THAMES. MODERATE OR
ROUGH. RAIN THEN FAIR. GOOD.
- References:
- Re: I'd give my right arm for a continue statement, steve donovan
- Re: I'd give my right arm for a continue statement, HyperHacker
- Re: I'd give my right arm for a continue statement, Michal Kottman
- Re: I'd give my right arm for a continue statement, steve donovan
- Re: I'd give my right arm for a continue statement, Alexander Gladysh
- Re: I'd give my right arm for a continue statement, steve donovan
- Re: I'd give my right arm for a continue statement, Roberto Ierusalimschy
- Re: I'd give my right arm for a continue statement, Axel Kittenberger
- Re: I'd give my right arm for a continue statement, Axel Kittenberger
- Re: I'd give my right arm for a continue statement, Lucas Zawacki
- Re: I'd give my right arm for a continue statement, Sean Conner