On Thursday, 27 May 2021 at 09:58:40 UTC, Christian Köstlin wrote:
I have this small program here
test.d:
```
import std;
string doSomething(string[] servers, string user) {
return user ~ servers[0];
}
void main() {
auto servers = ["s1", "s2", "s3"];
auto users = ["u1", "u2", "u3"];
writeln(map!(user => servers.doSomething(user))(users));
writeln(taskPool.amap!(user =>
servers.doSomething(user))(users));
}
```
I think it relates to
https://issues.dlang.org/show_bug.cgi?id=5710
The reason is that amap requires a this pointer of type TaskPool
and a context pointer to the closure which belongs to main, at
least because it requires servers. Having both isn't possible due
to problems in non DMD compilers.
If you rewrite it more statically:
```D
string doSomething(string[] servers, string user) {
return user ~ servers[0];
}
string closure(string user)
{
return servers.doSomething(user);
}
auto servers = ["s1", "s2", "s3"];
int main()
{
auto users = ["u1", "u2", "u3"];
writeln(map!(user => servers.doSomething(user))(users));
writeln(taskPool.amap!(closure)(users));
return 0;
}
```
PS: Just enable markdown if you want to highlight D code
