Yes:
> foo: {
> // ...
> if (bar)
> continue foo // (currently a SyntaxError)
> // ...
> }
in my first attempt at posting this I did something similar:
function foo(v){
>
>>>> return v + 1;
>>>> }
>>>>
>>>>
>>>> var i = 0;
>>>>
>>>> baz:{
>>>> i += 1;
>>>> }
>>>>
>>>> continue baz;//same as foo(i);
>>>>
>>>> console.log(i);
But not that I want restriction on where continue can be use; only in block
scope. Rather that's in an if/else else if statement or a function statement.
And another important thing is I want label statement reachable from the scope
they are define.
So my first attempt example would actually be rewritten to:
var i;
foo:{
if(typeof i!=='number') break;
i+=1;
}
I =0;
{
if (i < 5);
continue foo;
}
console.log(i);//log 4
Again the true aim for this is to lower function calls.
JS4Lf
> On May 20, 2015, at 11:56 AM, Claude Pache <[email protected]> wrote:
>
> I occasionally (quite rarely) use the following variant of the classical
> `do/while(false)` trick:
>
> ``
> foo: do {
> // ...
> if (bar)
> continue foo // meaning: restart from foo
> // ...
> break
> } while (true) // not a real loop, just a hack
> ```
>
> Maybe the following syntax could be used?
>
> ```
> foo: {
> // ...
> if (bar)
> continue foo // (currently a SyntaxError)
> // ...
> }
> ```
>
> WDYT?
>
> —Claude
>
>
>> Le 20 mai 2015 à 12:45, Sebastian McKenzie <[email protected]> a écrit :
>>
>> So you want to add goto to JavaScript?
>>
>>
>>
>>
>>> On Wed, May 20, 2015 at 11:42 AM, Emanuel Allen <[email protected]>
>>> wrote:
>>> Clarify:
>>>
>>> My previous post was not that clear. That post display what I would like to
>>> do in the language. Here is the actual code if I choose to do it as the
>>> language is now:
>>> var i = 0, n = 5;
>>> l2: do {
>>> i += 1;
>>> l3: do {
>>> if (i<n) continue l2;
>>> else break l3;
>>> } while (true);
>>> break l2;
>>> } while (true);
>>> //just log the value n+1:
>>> console.log('i:'+i);
>>>
>>> loop through label l2 n amount of times before breaking.
>>>
>>> This could be useful to escape function invocation cost, if it could be
>>> simply express:
>>> l2: {
>>> i += 1;
>>> }
>>> l3: {
>>> if (i<n) continue l2;
>>> }
>>>
>>> The function way is to:
>>> function l2(){
>>> i += 1;
>>> }
>>>
>>> l3: do {
>>> if (i<n) l2();
>>> else break l3;
>>> } while (true);
>>>
>>> I did a <a href="http://jsperf.com/block-scope-vs-function-invocation";>
>>> jsprf </a>to further my argument for a sudo goto/function effect:
>>>
>>> http://jsperf.com/block-scope-vs-function-invocation
>>>
>>> JS4Lf
>>>
>>>> On May 19, 2015, at 2:45 PM, L4L <[email protected]> wrote:
>>>>
>>>> Since we have block scope, and we have continue statement to which we can
>>>> use in loops to jump back to the conduction statement part.
>>>>
>>>> Than can we consider making label stamens moveable by its name.
>>>>
>>>> I'll like to say that the side effect would be sudo(pseudo) function,
>>>> example:
>>>>
>>>> function foo(v){
>>>> return v + 1;
>>>> }
>>>>
>>>>
>>>> var i = 0;
>>>>
>>>> baz:{
>>>> i += 1;
>>>> }
>>>>
>>>> continue baz;//same as foo(i);
>>>>
>>>> console.log(i);
>>>>
>>>> Note that I said sudo function. Its mobility is what of value; depending
>>>> on how JavaScript handle the continue statement in a loop to transport
>>>> that effect out side a loop.
>>>>
>>>> Stripping this privilege to black scope; where the continue statement is
>>>> expanded to work only in block scope and nested block scope; to where it
>>>> can only jump to the beginning of that block or any other block scope that
>>>> is scoped to that outer block scope but not nested block scope with in the
>>>> scope... Like function.
>>>>
>>>> Continue and break statement could be of more power; where we can avoid
>>>> some function call in "speed matter" application.
>>>>
>>>> Excuse any grammar errors.
>>>>
>>>> JS4Lf
>>>> _______________________________________________
>>>> es-discuss mailing list
>>>> [email protected]
>>>> https://mail.mozilla.org/listinfo/es-discuss
>>
>> _______________________________________________
>> es-discuss mailing list
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>
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