so what exactly is const supposed to mean?

[Bruno Medeiros]

Sean Kelly wrote:
> Bruno Medeiros wrote:
>> Sean Kelly wrote:
>>>
>>>  > and doesn't D already have a const keyword?
>>>
>>> D has const as a storage attribute, which is a bit different from the 
>>> above.  D's const may only apply to concrete data types, and implies 
>>> that the data will never be modified for the duration of the program. 
>>> This allows the compiler to place such data in ROM and to perform 
>>> some optimizations that would otherwise not be possible.  But this is 
>>> quite limited in that it may only be applied to data that can be 
>>> evaluated at compile-time.
>>>
>>
>> There is a slight difference from D's const and a const that places 
>> the data in ROM as you cannot get the address of a D const var (it's 
>> not an lvalue).
> 
> Ever tried taking the address of a const string?  That you can't take 
> the address of other const types is simply a result of optimization.
> 

I tried it now, and the const string also can't be taken an address from:

   const char[] str = "ABC";

   void func()
   {
     *(&str) = "123"; // : "ABC" is not an lvalue
   }


-- 
Bruno Medeiros - CS/E student
http://www.prowiki.org/wiki4d/wiki.cgi?BrunoMedeiros#D