import std.stdio;

import core.stdc.stdlib;

import core.stdc.string;

​

struct S {

    int* vals;

    size_t length;

​

    this(this){

        // vals = cast(int*)malloc(length * S.sizeof);

        memcpy(vals, vals, length * S.sizeof);

        writeln("copied");

    }

}

​

void main()

{

    size_t len = 2;

​

    int* vals = cast(int*)malloc(len * S.sizeof);

    vals[0] = 4;

    vals[1] = 5;

​

    S s1 = S(vals, len);

​

    S s2 = s1;

​

    writeln(s2.vals);

    writeln(s1.vals);

}