Re: why is it a class property cannot be used like a.b ~= c; ?
On Saturday, 4 September 2021 at 23:57:09 UTC, jfondren wrote: You're returning a copy of a slice, so if this compiled nothing useful would happen anyway. This works if `whatever()` returns `ref dstring` instead, with no other changes. Search https://dlang.org/spec/function.html for 'lvalue' and this pops right up. At first glance it seems a bit counter-intuitive but yes, you are right, thanks for the link jfronden :)
Re: why is it a class property cannot be used like a.b ~= c; ?
On Saturday, 4 September 2021 at 23:33:39 UTC, someone wrote:
```d
public class cSomething {
private:
dstring pstrWhatever = null;
public:
@safe dstring whatever() { return pstrWhatever; }
@safe void whatever(const dstring lstrWhatever) {
pstrWhatever = lstrWhatever; }
}
void main() {
cSomething lobjSomething = new cSomething();
lobjSomething.whatever = r"abc"d;
lobjSomething.whatever ~= r"def"d; /// Error:
`lobjSomething.whatever()` is not an lvalue and cannot be
modified
}
```
You're returning a copy of a slice, so if this compiled nothing
useful would happen anyway. This works if `whatever()` returns
`ref dstring` instead, with no other changes. Search
https://dlang.org/spec/function.html for 'lvalue' and this pops
right up.
why is it a class property cannot be used like a.b ~= c; ?
```d
public class cSomething {
private:
dstring pstrWhatever = null;
public:
@safe dstring whatever() { return pstrWhatever; }
@safe void whatever(const dstring lstrWhatever) { pstrWhatever
= lstrWhatever; }
}
void main() {
cSomething lobjSomething = new cSomething();
lobjSomething.whatever = r"abc"d;
lobjSomething.whatever ~= r"def"d; /// Error:
`lobjSomething.whatever()` is not an lvalue and cannot be modified
}
```
