On Friday, 8 February 2019 at 06:55:15 UTC, Jerry wrote:
On Friday, 8 February 2019 at 04:51:08 UTC, Sudhi wrote:
On Friday, 8 February 2019 at 04:30:23 UTC, Arun
Chandrasekaran wrote:
On Friday, 8 February 2019 at 04:13:39 UTC, Sudhi wrote:
[...]
Works fine for me with DMD64 D Compiler v2.083.1.
https://run.dlang.io/is/RRM8GU
My example code was wrong. Below is the right one.
struct Company
{
string name;
string location;
}
struct Racks
{
int number;
int location;
}
struct Metadata
{
string name;
Company[] companies;
Racks[] racks;
}
struct Item
{
Metadata[] met;
int count;
}
shared (Item) item;
void main()
{
updateMetadata();
}
void updateMetadata()
{
Company company;
company.name = "Hello";
company.location = "Bangalore";
item.met.companies ~= company;
import std.stdio: writeln;
writeln(item);
}
https://run.dlang.io/is/iem0PY
You have to cast away shared:
auto loc_item = cast(Item) item;
loc_item.met ~= m;
item = cast(shared) loc_item;
Just to be clear, this is not threadsafe and require a mutex if
you do this other than as init in main.
You do not need to cast away shared. You had a couple of issues
with your `updateMetadata()` function.
First of, `met` is an array, so you need to index it: your code
`item.met.companies ~= company` becomes `item.met[0].companies ~=
company`. This will compile, but throw a range error because you
don't have any `Metadata` object in your `met` array.
I have typed below the revised form of your function
```
void updateMetadata()
{
// create a Company instance. This must be shared
shared Company company;
company.name = "Hello";
company.location = "Bangalore";
// create a shared Metadata instance
shared Metadata m;
m.name = "m";
// append m to the array of meta
item.met ~= m;
// append the company to the array of companies, for a given
meta
item.met[0].companies ~= company;
import std.stdio: writeln;
writeln(item);
}
```
The working version is at https://run.dlang.io/is/RvRKrU
Cheers,
Edi
