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digitalmars.D - How do I refer to /this/ object?

reply Nils Hensel <nils.hensel web.de> writes:
Hello everybody,

what is D's equivalent to C++'s "this" keyword? How can I refer to the 
object instance itself?

Nils
Apr 23 2005
next sibling parent "Unknown W. Brackets" <unknown simplemachines.org> writes:
Umm... this?  How does the D "this" differ from the C++ "this"?

-[Unknown]



 Hello everybody,
 
 what is D's equivalent to C++'s "this" keyword? How can I refer to the 
 object instance itself?
 
 Nils
Apr 23 2005
prev sibling next sibling parent "Andrew Fedoniouk" <news terrainformatica.com> writes:
According to http://www.digitalmars.com/d/lex.html#keyword :)
D has also 'this' keyword.

this.param = 123;

Andrew.
Apr 23 2005
prev sibling parent reply Derek Parnell <derek psych.ward> writes:
On Sun, 24 Apr 2005 00:24:30 +0200, Nils Hensel wrote:


 Hello everybody,
 
 what is D's equivalent to C++'s "this" keyword? How can I refer to the 
 object instance itself?
 


The answer is 'this'. 

Example code:
//----------------
import std.stdio;

class Foo
{
    char[] v;
    
    this()
    {
        v = "abc".dup;
    }
    
    void disp(char[] v)
    {
        writefln("%s", this.v ~ v);
    }
}

void main()
{
    Foo f = new Foo;
    
    f.disp("def");
}
//------------


-- 
Derek Parnell
Melbourne, Australia
24/04/2005 9:05:35 AM
Apr 23 2005
parent reply Nils Hensel <nils.hensel web.de> writes:
Derek Parnell schrieb:

 The answer is 'this'. 


Thanks to all for your answers. Actually I tried this but always got a 
compiler error which I thought was connected to "this". What actually 
got me was:

<D Documentation>

If there is no constructor for a class, but there is a constructor for 
the base class, a default constructor of the form:

	this() { }
	
is implicitly generated.

</D Documentation>

Somehow I was thinking that the constructor would be inherited. I'm too 
tired for programming right now I believe. Too many stupid ideas. Better 
get some sleep. ;-)


Thanks anyway,

Nils
Apr 23 2005
parent "TechnoZeus" <TechnoZeus PeoplePC.com> writes:
"Nils Hensel" <nils.hensel web.de> wrote in message
news:d4emra$2ksa$1 digitaldaemon.com...

 Derek Parnell schrieb:

 The answer is 'this'.


 Thanks to all for your answers. Actually I tried this but always got a
 compiler error which I thought was connected to "this". What actually
 got me was:

 <D Documentation>

 If there is no constructor for a class, but there is a constructor for
 the base class, a default constructor of the form:

 this() { }

 is implicitly generated.

 </D Documentation>

 Somehow I was thinking that the constructor would be inherited. I'm too
 tired for programming right now I believe. Too many stupid ideas. Better
 get some sleep. ;-)


 Thanks anyway,

 Nils


It is inhereted, but under the name "super" rather than "this" so that you have
access to both.

TZ
Apr 24 2005