Delegates and values captured inside loops
FeepingCreature
feepingcreature at gmail.com
Sat Jan 20 16:32:42 UTC 2024
On Saturday, 20 January 2024 at 15:59:59 UTC, Anonymouse wrote:
> I remember reading this was an issue and now I ran into it
> myself.
>
> ```d
> import std.stdio;
>
> void main()
> {
> auto names = [ "foo", "bar", "baz" ];
> void delegate()[] dgs;
>
> foreach (name; names)
> {
> dgs ~= () => writeln(name);
> }
>
> foreach (dg; dgs)
> {
> dg();
> }
> }
> ```
>
> Expected output: `foo`, `bar`, `baz`
> Actual output: `baz`, `baz`, `baz`
>
> If I make `names` an `AliasSeq` it works, but I need it to be a
> runtime array.
>
> Is there a workaround?
```
foreach (name; names)
{
dgs ~= ((name) => () => writeln(name))(name);
}
```
lol
More information about the Digitalmars-d-learn
mailing list