On Sunday, 8 October 2023 at 10:09:02 UTC, IchorDev wrote:
On Wednesday, 4 October 2023 at 01:46:42 UTC, Joel wrote:
I think the if without static is still static, since it's part
of the function name part, or so (outside of the curly bracket
scope).
You can't have regular if-statements inside templates. Regular
if-statements are checked at runtime but templates only exist
at compile-time.
The way to write a *template constraint*—which is what you
want, and uses the `if` keyword—is thus:
```d
struct List(T)
if(__traits(isIntegral, T)){
auto addUp()
//(Add numbers)
}
}
```
Notice that the curly brace for the template comes after the
template constraint, and that there are only 2 curly braces
rather than the 3 from your example.
This snippet does not compile. The curly brackets must be an
even number, that is, they must terminate each other.
SDB@79
