On Saturday, 21 May 2016 at 08:24:19 UTC, Ali Çehreli wrote:
On 05/21/2016 01:07 AM, chmike wrote:
> Unfortunately it is not possible to write this
>
> import std.typecons;
> class Info{...}
> rebindable!Info x;
You have a capitalization typo. Rebindable is a type template,
rebindable is a
On 05/21/2016 01:07 AM, chmike wrote:
> Unfortunately it is not possible to write this
>
> import std.typecons;
> class Info{...}
> rebindable!Info x;
You have a capitalization typo. Rebindable is a type template,
rebindable is a function template.
import std.typecons;
class Info{}
void
Since I'm trying to implement a flyweight pattern, the opEqual
need only comparision of reference in my case.
By the way, what operation is the switch performing ? OpEqual or
is ?
Unfortunately it is not possible to write this
import std.typecons;
class Info{...}
rebindable!Info x;
I get the following error message
source/app.d(11,3): Error: template std.typecons.rebindable
matches more than one template declaration:
/usr/include/dmd/phobos/std/typecons.d(1675,14):
On Friday, 20 May 2016 at 16:09:54 UTC, chmike wrote:
This is confusing and frustrating. In C++ we can write
MyInfos {
. . .
// one is a constant pointer to a constant object of type Obj
Obj const * const one;
. . .
}
And in main()
Info const * x1 = MyInfos.one;
x1 i a modifiable
On Friday, 20 May 2016 at 16:09:54 UTC, chmike wrote:
But I now met another error in my main(). I can't assign the
immutable object to a mutable reference.
Info x1 = MyInfos.one;
Is it possible to define a mutable reference to an immutable
instance ?
This is confusing and frustrating.
On Friday, 20 May 2016 at 20:30:22 UTC, chmike wrote:
I'm a bit surprized that the language doesn't support this. We
have immutable strings that can be assigned to different
variables. Why couldn't we do the same with objects ?
Consider this:
immutable(char)[] str;
Here, the array
On Friday, May 20, 2016 20:30:22 chmike via Digitalmars-d-learn wrote:
> On Friday, 20 May 2016 at 17:35:01 UTC, Kagamin wrote:
> > On Friday, 20 May 2016 at 16:09:54 UTC, chmike wrote:
> >> But I now met another error in my main(). I can't assign the
> >> immutable object to a mutable reference.
On Friday, 20 May 2016 at 17:35:01 UTC, Kagamin wrote:
On Friday, 20 May 2016 at 16:09:54 UTC, chmike wrote:
But I now met another error in my main(). I can't assign the
immutable object to a mutable reference.
Info x1 = MyInfos.one;
Is it possible to define a mutable reference to an
On Friday, 20 May 2016 at 16:09:54 UTC, chmike wrote:
But I now met another error in my main(). I can't assign the
immutable object to a mutable reference.
Info x1 = MyInfos.one;
Is it possible to define a mutable reference to an immutable
instance ?
Sort of possible with a library
On Friday, 20 May 2016 at 15:43:28 UTC, Marc Schütz wrote:
It looks like your don't actually need `Obj` to be a real
nested class. Try declaring it as `static Obj : Info { }`. This
should work if `Obj`'s methods don't need access to `MyInfo`'s
non-static members.
That worked great. Thank
I solved the problem by moving the class Obj definition out of
the class MyInfo.
I still don't understand why I had to do that. In C++ this would
work without problem.
I now have
interface Info {. . .}
class Obj : Info {. . .}
class MyInfos
{
. . .
static immutable Obj one = new
On Friday, 20 May 2016 at 15:07:53 UTC, chmike wrote:
The error message is gone, but I now have another compilation
error message I don't understand.
This is what I have in fact
interface Info { . . . }
class MyInfos {
. . .
protected:
class Obj : Info
{
. . .
}
public:
The error message is gone, but I now have another compilation
error message I don't understand.
This is what I have in fact
interface Info { . . . }
class MyInfos {
. . .
protected:
class Obj : Info
{
. . .
}
public:
static immutable Obj one = new immutable Obj(...);
I'm implementing the flyweight pattern. It means that I have a
set of object instances representing all the possible values.
This allows me to manipulate "values" by simply manipulating
references to the instance. Testing "value" equality boils down
to simply compare reference value. I hope
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