On 28.06.2024 15:43, Josh Holtrop wrote:
On Friday, 28 June 2024 at 10:52:01 UTC, drug007 wrote:
Nothing prevents that, and indeed I still plan to use item.match! like
that when I need to handle multiple/all types. I just wanted the get!
functionality when I only expect or want to handle one type without all
the additional pattern matching syntax.
But, I think my:
```d
if (Foo foo = item.get!Foo)
{
/* do something with foo */
}
```
is still only checking the type once due to the one call to match! in
get!, right?
Both yes and no, you check the type once, but then check for null, so a
double check is performed nonetheless. But for me it's a minor difference.
There are two common ways to handle sumtypes: using either an explicit
type tag or implicit type handling. Both have their pros and cons. As I
know (can be wrong) std.sumtype implies type handlers not type tags.
