...manifest constant on right-hand side of alias declaration" fixing this issue:

- Fix Issue 22969...

...More inference is the way to go.

### alias
Mathias says we resolve aliases in the...

...mixin ("enum E_ {", S.attr, "}");
}

struct S
{
    alias E = E_!();
    E e;
    enum attr = "a";
}

--

...template E_()
{
        mixin ("enum E_ {", S.attr, "}");
}

alias E = E_!();

struct S
{
    E e;
    enum...

...de
            Summary|Allow aliasing of an        |Symbol alias of member
                   |aggregate template instance |function impossible...

https://issues.dlang.org/show_bug.cgi?id=22969

--- Comment #2 from moonlightsentinel@disroot.org...

...Failure with output: onlineapp.d(2): Error: alias
`onlineapp.a` cannot alias an expression `0`

--

...void foo(int){};
alias bar=foo;
void bar(bool){}
alias foobar=bar;
alias foo=foobar;
```

--

...0;
alias a = mixin("e");
---

The error message is:

---
onlineapp.d(2): Error: alias `onlineapp...

...import std.sumtype;
import std.algorithm : cmp;

alias VarType = SumType!(double, ubyte[]);


int opCmp(const...