On Sunday, 10 July 2022 at 18:31:46 UTC, drug007 wrote:
On 7/10/22 20:26, anonymouse wrote:
On Sunday, 10 July 2022 at 06:26:37 UTC, jfondren wrote:
```d
import std.variant : Variant;
size_t[] shape(Variant v) {
import std.variant : VariantException;
size_t[] s;
try {
while (true) {
Variant elem = v[0];
s ~= v.length;
v = elem;
}
} catch (VariantException e) {
return s;
}
}
```
Thank you very much.
I'd like to say that using of exception to break loop is really
bad. Exception is exceptional thing but in the case above the
exception is ordinary completion of the loop happens on regular
basis. Don't do that.
For reference, this is the more correct way:
```d
while (cast(TypeInfo_Array) v.type !is null) {
Variant elem = v[0];
// etc.
}
```
Hard to blame anyone for not coming up with that on their first
try, especially since `TypeInfo_Array` is not even
documented--you have to read the source of `object.d` to find out
about it.
