[Laszlo-dev] Re: [Internal-Dev] don't use name="pp"

[P T Withington]

We kid you not.  It's in the freakin' standard.  Faked myself out on  
this a whole bung of times.  But, it sure makes for a simple  
compiler.  (Gee, even C didn't go for that simple.)  I'd love to know  
if the only reason for this was to make a simple compiler, or if  
someone thought block scoping was too difficult for the target audience.

On 3 Jun 2005, at 16:58, Scott Evans wrote:

> > 'var' in js  has function scope no matter where it occurs within
> > the function
>
> *hork*
>
> You're kidding!
>
>
>
>
>
> Oliver Steele wrote:
>
>> [Tucker has a fix, but for those of you who are curious about the  
>> js  semantics here:]
>> On May 27, 2005, at 5:54 PM, Adam Wolff wrote:
>>
>>> wow. didn't occur to me. if you said
>>>   var pp
>>>
>>> within the with() block, would that fix it?
>>>
>> If it did, that would just be indicative of another bug.  'var' in  
>> js  has function scope no matter where it occurs within the  
>> function, so  the following two programs have identical semantics:
>>    function f() {
>>     with (this) {
>>       var x=1;
>>     }
>>   }
>>   function f() {
>>     var x;
>>     with (this) {
>>       x=1
>>     }
>>   }
>> This is weird, and it's different from C(++) and Java where f()  
>> below  has two different local variables (with the same name), and  
>> is  therefore equivalent to g():
>>   void f() {
>>     {int a = 1; do_something_with(a);}
>>     {int a = 1; do_something_with(a);}
>>   }
>>   void f() {
>>     int a, b;
>>     a = 1; do_something_with(a);
>>     b = 1; do_something_with(b);
>>   }
>> But it is what it is.
>>
>>> Sarah Allen wrote:
>>>
>>>
>>>> could it be this in LzNode.as, __LZresolveRefs:
>>>>                 with ( _root){
>>>>                     with( this ){
>>>>                         pp = eval( rp );
>>>>                     }
>>>>                 }
>>>> pp is earlier declared as a var, but doesn't with (_root)  
>>>> evaluate  it in the global context and potentially clobber  
>>>> anything called  'pp' ?
>>>> Andrew McClain wrote:
>>>>
>>>>
>>>>> This time i'm not crazy.
>>>>>
>>>>> <canvas>
>>>>>      <dataset name="ds">
>>>>>         <item value="foo"/>
>>>>>     </dataset>
>>>>>
>>>>>        <view name="pp">
>>>>>         <edittext datapath="ds:/item/@value"/>
>>>>>     </view>
>>>>>
>>>>>           <simplelayout/>
>>>>> </canvas>
>>>>>
>>>>> will NOT work
>>>>>
>>>>> but
>>>>>
>>>>> <canvas>
>>>>>      <dataset name="ds">
>>>>>         <item value="foo"/>
>>>>>     </dataset>
>>>>>
>>>>>        <view name="notpp">
>>>>>         <edittext datapath="ds:/item/@value"/>
>>>>>     </view>
>>>>>
>>>>>           <simplelayout/>
>>>>> </canvas>
>>>>>
>>>>> WILL.
>>>>>
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