&this pointer

[Bill Baxter]

By reference it means that 'this' already *is* a pointer.
You don't need to take it's address.  If you do you're just getting the 
address of the pointer not the address of the object.

Try something like
    writefln("%x",cast(void*)this);
if you really want to see the address of the object.

--bb

e-t172 wrote:
> Hi,
> 
> I'm a beginner with D, I've got some basis with C/C++ but I mainly 
> program with PHP. Ad far as I'm concerned, D is a very interesting 
> language, hence I started to develop a personal project in D to get a 
> clear idea of its features ; nonetheless, during my research, I've 
> noticed a behavior I considered very weird about the 'this' reference. 
> According to what I understood from the documentation, it is a reference 
> to the object itself, so coherently, &this should return the memory 
> address of the object itself.
> 
> It that is correct, could one explain that to me (compiled with DMD 1.0) :
> 
> ---
> 
> import std.stdio;
> import std.string;
> 
> class Test
> {
>     this()
>     {
>         writefln("in this() itself - &this : ", &this);
> 
>         foo("called from this(), first shot");
>         foo("called from this(), second shot");
>     }
> 
>     void foo(char[] location)
>     {
>         writefln(location, " - foo() - &this : ", &this);
> 
>         bar(location);
>     }
> 
>     void bar(char[] location)
>     {
>         writefln(location, " - bar() - &this : ", &this);
>     }
> }
> 
> int main()
> {
>     auto test = new Test();
> 
>     test.foo("called from main(), first shot");
>     test.foo("called from main(), second shot");
> 
>     return 0;
> }
> 
> ---
> 
> $ ./test
> in this() itself - &this : BFAE4394
> called from this(), first shot - foo() - &this : BFAE4370
> called from this(), first shot - bar() - &this : BFAE4344
> called from this(), second shot - foo() - &this : BFAE4370
> called from this(), second shot - bar() - &this : BFAE4344
> called from main(), first shot - foo() - &this : BFAE438C
> called from main(), first shot - bar() - &this : BFAE4360
> called from main(), second shot - foo() - &this : BFAE438C
> called from main(), second shot - bar() - &this : BFAE4360
> 
> ---
> 
> In accordance with the output, the object location in memory endlessly 
> changes ?! I admit to be a little startled...
> 
> e-t172