Re: Dynamic Ctors ?
On Monday, 8 February 2016 at 15:09:30 UTC, Kagamin wrote: http://dpaste.dzfl.pl/1f25ac34c1ee You need Tuple, not Algebraic. Algebraic stores only one value of one type from a set, like Variant. Thank you for answering. You right if i would want to store all types of T.. in an Inner instance. But my conception was bad from the beginning. I want to store only one type of value in Inner instance. I just wanted to create generic constructor for each of Type which is invalid, cause instance holds value of single type that's why it is not parametrized by itself.
Re: Dynamic Ctors ?
On Monday, 8 February 2016 at 07:08:58 UTC, Voitech wrote:
On Saturday, 6 February 2016 at 23:35:17 UTC, Ali Çehreli wrote:
On 02/06/2016 10:05 AM, Voitech wrote:
> [...]
You can use string mixins (makeCtor and makeCtors):
string makeCtor(T)() {
import std.string : format;
[...]
Thank you very much for answering.
Cheers
Unfortunately this doesn't work as I'am trying to assign value
from ctor to member something like:
this(%s value){
this.value=value;
}
it gives me
Error: memcpy cannot be interpreted at compile time, because it
has no available source code.
Probably this is caused by declaration of member which is also
parametrized with T...
Member is:
Algebraic!(T) value;
So declaration of this mixin constructors are done before
variable value is declared (compilation)?
Is there any field in class that would contain ctors ? Something
like __ctors ?
i could try to init this(T... value) constructors in static
constructor using delegates/functions. Something like:
template Outer(T...){
class Inner{
Algebraic!(T) value;
alias ctor(Type) =Inner delegate (Type value);
static this(){
foreach(Type;T){
ctor!(Type) c={
this.value=value;
};
__ctors~=c; // ?
}
}
}
Re: Dynamic Ctors ?
http://dpaste.dzfl.pl/1f25ac34c1ee You need Tuple, not Algebraic. Algebraic stores only one value of one type from a set, like Variant.
Re: Dynamic Ctors ?
On Saturday, 6 February 2016 at 23:35:17 UTC, Ali Çehreli wrote:
On 02/06/2016 10:05 AM, Voitech wrote:
> [...]
You can use string mixins (makeCtor and makeCtors):
string makeCtor(T)() {
import std.string : format;
[...]
Thank you very much for answering.
Cheers
Re: Dynamic Ctors ?
On 02/06/2016 10:05 AM, Voitech wrote:
> create manually, constructor
> for each of T... parameter types
You can use string mixins (makeCtor and makeCtors):
string makeCtor(T)() {
import std.string : format;
return format(q{
this (%s t) {
import std.stdio : writefln;
writefln("Ctor for %%s", %s.stringof);
}
}, T.stringof, T.stringof);
}
// Note: Use a pragma(msg) to see what it generates:
// pragma(msg, makeCtor!int);
string makeCtors(T...)() {
string result;
foreach (Type; T) {
result ~= makeCtor!Type();
}
return result;
}
mixin template foo(T...) {
class Inner {
mixin (makeCtors!T());
}
}
mixin foo!(int, string);
void main() {
auto i = new Inner(42);
auto s = new Inner("hello");
}
Output:
Ctor for int
Ctor for string
Ali
Re: Dynamic Ctors ?
On Saturday, 6 February 2016 at 18:05:05 UTC, Voitech wrote:
Hi, i have a variadic args template, with a class inside
something like:
template foo(T...){
class Inner(){
...
...
}
}
Now i want to make Inner create or i will create manually,
constructor for each of T... parameter types, but don't know
what is syntax for it. I found that there is possibility to
initialize T... types static variables with AliasSeq!(T) but
how to do this automatically, or with static ifs,for
constructors ?
I tried ...
template foo(T...){
alias Types=AliasSeq!(T);
Algebraic!(T) value;
this(Types value)
this.value=value;
}
}
But this dosn't work
This gives Error: memcpy cannot be interpreted at compile time,
because it has no available source code
