Re: continue continued, with break N
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- Subject: Re: continue continued, with break N
- From: David Manura <dm.lua@...>
- Date: 2010年11月19日 22:46:05 -0500
On Fri, Nov 19, 2010 at 2:20 AM, Axel Kittenberger <axkibe@gmail.com> wrote:
> wait, +0 is something different than -0? No please not.
Another numbering scheme may be better, but I think now that numbered
scopes are less readable/decipherable than named scopes.
Interestingly, Lua already has named scopes: they are called lexical
variables. That leads to this proposal:
for x=1,10 do
local cont -- dummy variable
for y=1,10 do
if f(x,y) then break x end -- jump to end of x scope (i.e.
break outer loop)
if g(x,y) then break cont end -- jump to end of cont scope
(i.e. continue outer loop)
end
end
which may warrant serious consideration. It opens up some other
possibilities too, if the language designer chooses to allow it:
do
local s
if a() then break s end -- break out of non-loop blocks too.
end
function f()
local x
return function()
break x -- could this even be allowed? (break across functions)
end
end
f()()()()()