Re: Calling copyctor manually

2019-06-01 Thread SrMordred via Digitalmars-d-learn 

On Saturday, 1 June 2019 at 19:10:36 UTC, Paul Backus wrote:

On Saturday, 1 June 2019 at 02:27:36 UTC, SrMordred wrote:



void main() {
T a;
T b;
a.__ctor(b);
}
https://run.dlang.io/is/NeioBs


Thanks!
The most obvious way i didn´t think :P

Re: Calling copyctor manually

2019-06-01 Thread Paul Backus via Digitalmars-d-learn 

On Saturday, 1 June 2019 at 02:27:36 UTC, SrMordred wrote:

Its possible to call copyctor manually without calling dtor?

ex, what i did before:

struct T{ ~this(){ writeln("DTOR"); } this(this){ 
writeln("POSTBLIT"); } }


T a;
T b;

memcpy(,,T.sizeof);
a.__postblit;

/*
output:
POSTBLIT
DTOR
DTOR
*/

With copy ctors, not sure what to do.


struct T{
~this(){ writeln("DTOR"); }   
this(ref return scope T self){ writeln("COPYCTOR"); } }

T a;
T b;

memcpy(,,T.sizeof);
a.opAssign(b); //???
//same as a = b;

/*
output:
COPYCTOR
DTOR
DTOR
DTOR
*/

I want something like '.__xcopyctor'


The copy constructor is implemented as an overload of `__ctor`:

import std.stdio;

struct T {
~this() { writeln("DTOR"); }
this(ref return scope T self) { writeln("COPYCTOR"); }
}

void main() {
T a;
T b;
a.__ctor(b);
}

/* Output:
COPYCTOR
DTOR
DTOR
*/

https://run.dlang.io/is/NeioBs

Calling copyctor manually

2019-05-31 Thread SrMordred via Digitalmars-d-learn 

Its possible to call copyctor manually without calling dtor?

ex, what i did before:

struct T{ ~this(){ writeln("DTOR"); } this(this){ 
writeln("POSTBLIT"); } }


T a;
T b;

memcpy(,,T.sizeof);
a.__postblit;

/*
output:
POSTBLIT
DTOR
DTOR
*/

With copy ctors, not sure what to do.


struct T{
~this(){ writeln("DTOR"); }   
this(ref return scope T self){ writeln("COPYCTOR"); } }

T a;
T b;

memcpy(,,T.sizeof);
a.opAssign(b); //???
//same as a = b;

/*
output:
COPYCTOR
DTOR
DTOR
DTOR
*/

I want something like '.__xcopyctor'