Re: Operator Overloading with class template
* Eyyub eyyub.pangeara...@gmail.com [2012-04-09 01:14:32 +0200]:
Hello,
How can I rewrite the exemple 2 (http://pastebin.com/q50903Zh) in D
lang. ?
This source code doesn't work...why ?
http://paste.pocoo.org/show/wy1kDIpqTi2ApRuOxRRb/
Thx. :)
What you want is something like this:
class Value(int M, int K, int S)
{
private
{
float _value;
}
public
{
this(float val)
{
_value = val;
}
auto opBinary(string op : /, int MO, int KO, int SO)(Value(MO,
KO, SO) other) {
return new Value!(M-MO, K-KO, S-SO)(_value/other.value);
}
}
}
A Few notes:
1. This isn't tested, might not work, but thats where you should aim...
2. Operator overloading is implemented as a lowering (as far as I'm aware) the
compiler emits a template instantiation of opBinary(/) for the type. That
means that you can add on more template arguments.
3. Using `auto` means that the compiler works out the type, so you don't have
to add extra template arguments to calculate the correct type.
Hope that helps.
--
James Miller
Re: Operator Overloading with class template
On Monday, 9 April 2012 at 09:09:05 UTC, James Miller wrote:
* Eyyub eyyub.pangeara...@gmail.com [2012-04-09 01:14:32
+0200]:
Hello,
How can I rewrite the exemple 2 (http://pastebin.com/q50903Zh)
in D
lang. ?
This source code doesn't work...why ?
http://paste.pocoo.org/show/wy1kDIpqTi2ApRuOxRRb/
Thx. :)
What you want is something like this:
class Value(int M, int K, int S)
{
private
{
float _value;
}
public
{
this(float val)
{
_value = val;
}
auto opBinary(string op : /, int MO, int KO, int
SO)(Value(MO, KO, SO) other) {
return new Value!(M-MO, K-KO,
S-SO)(_value/other.value);
}
}
}
A Few notes:
1. This isn't tested, might not work, but thats where you
should aim...
2. Operator overloading is implemented as a lowering (as far as
I'm aware) the
compiler emits a template instantiation of opBinary(/) for
the type. That
means that you can add on more template arguments.
3. Using `auto` means that the compiler works out the type, so
you don't have
to add extra template arguments to calculate the correct
type.
Hope that helps.
--
James Miller
Ho, yeah it works !!! :D :D
http://paste.pocoo.org/show/ye7VXQHfLxsVM38bKyS6/
Thanks a lot !
Re: Operator Overloading with class template
On Sunday, 8 April 2012 at 23:14:33 UTC, Eyyub wrote:
Hello,
How can I rewrite the exemple 2 (http://pastebin.com/q50903Zh)
in D lang. ?
This source code doesn't work...why ?
http://paste.pocoo.org/show/wy1kDIpqTi2ApRuOxRRb/
Thx. :)
As far as I know, there is nothing special about themplate
classes with regards to operator overloading, so you can follow
the examples in there: http://dlang.org/operatoroverloading.html
which in your example would yield:
Matrix opOpAssign(string op)( Matrix rhs )
{
for( size_t i =0 ; i M ; ++i )
{
for( size_t j =0 ; j N ; ++j )
{
mixin(array_[i*N+j] ~ op ~ rhs.array_[i*N+j] ;) ;
}
}
}
Bonus! all ...= operators implemented at once!
Re: Operator Overloading with class template
On Sunday, 8 April 2012 at 23:41:51 UTC, Francois Chabot wrote:
On Sunday, 8 April 2012 at 23:14:33 UTC, Eyyub wrote:
Hello,
How can I rewrite the exemple 2 (http://pastebin.com/q50903Zh)
in D lang. ?
This source code doesn't work...why ?
http://paste.pocoo.org/show/wy1kDIpqTi2ApRuOxRRb/
Thx. :)
As far as I know, there is nothing special about themplate
classes with regards to operator overloading, so you can follow
the examples in there: http://dlang.org/operatoroverloading.html
which in your example would yield:
Matrix opOpAssign(string op)( Matrix rhs )
{
for( size_t i =0 ; i M ; ++i )
{
for( size_t j =0 ; j N ; ++j )
{
mixin(array_[i*N+j] ~ op ~ rhs.array_[i*N+j] ;) ;
}
}
}
Bonus! all ...= operators implemented at once!
Nevermind, read your message too quickly... I thought it was
about the matrix class...
Re: Operator Overloading with class template
On Sunday, 8 April 2012 at 23:44:12 UTC, Francois Chabot wrote:
On Sunday, 8 April 2012 at 23:41:51 UTC, Francois Chabot wrote:
On Sunday, 8 April 2012 at 23:14:33 UTC, Eyyub wrote:
Hello,
How can I rewrite the exemple 2
(http://pastebin.com/q50903Zh) in D lang. ?
This source code doesn't work...why ?
http://paste.pocoo.org/show/wy1kDIpqTi2ApRuOxRRb/
Thx. :)
As far as I know, there is nothing special about themplate
classes with regards to operator overloading, so you can
follow the examples in there:
http://dlang.org/operatoroverloading.html
which in your example would yield:
Matrix opOpAssign(string op)( Matrix rhs )
{
for( size_t i =0 ; i M ; ++i )
{
for( size_t j =0 ; j N ; ++j )
{
mixin(array_[i*N+j] ~ op ~ rhs.array_[i*N+j] ;) ;
}
}
}
Bonus! all ...= operators implemented at once!
Nevermind, read your message too quickly... I thought it was
about the matrix class...
Np :D, you don't know how can I do for the example 2 ?
Re: Operator Overloading with class template
On 4/9/12, Eyyub eyyub.pangeara...@gmail.com wrote: Np :D, you don't know how can I do for the example 2 ? Well for one thing, there are no global operators in D. Others might help out with writing a proper opBinary that's defined in Value itself.
Re: Operator Overloading with class template
On Monday, 9 April 2012 at 00:04:50 UTC, Andrej Mitrovic wrote: On 4/9/12, Eyyub eyyub.pangeara...@gmail.com wrote: Np :D, you don't know how can I do for the example 2 ? Well for one thing, there are no global operators in D. Others might help out with writing a proper opBinary that's defined in Value itself. Like this : http://paste.pocoo.org/show/VupvqFTLqZxvZajw71MA/ ? I have the same errors :s Thanks
