On Thursday, 14 July 2022 at 13:57:24 UTC, realhet wrote:
Hello,
Somehow it can't reach map and array inside a class field
initializer. If I put that small expression inside a function,
it works. If I encapsulate the initializer expression into a
lambda and evaluate it right away, it also works. Only the nice
form fails.
Why is that?
```d
import std;
enum E{a, b, c}
static struct S{
const E e;
string otherProperties;
}
//trying to initialize an array inside
static if(1) class D{
//this fails: Error: function `onlineapp.D.map!(E[]).map`
need `this` to access member `map`
auto x = [EnumMembers!E].map!(e => S(e)).array;
}
```
Simpler workaround:
```d
// Explicit type annotation: vvv
auto x = [EnumMembers!E].map!((E e) => S(e)).array;
```
This turns the lambda from a template into a normal function,
which apparently is enough to un-confuse the compiler. Still
unclear why it's getting confused in the first place, though.
