`alias this` is a weird special case. It doesn't really behave like anything else...

...think about it as being similar to 'alias this', which seems to behave differently:

```d...

...source/argparse/help.d#L27-L47):
```d
alias CC = SumType!(AA,BB);
struct AA {}
struct...

...a.
}
```

```d
module b;

import a;

private alias x = a.x;
```

File systems work in...

...sumtype;

struct Tuple
{
	void opAssign(Tuple rhs) {}
}

alias ParseErrorOr = SumType!Tuple;

auto parserOr() {
	ParseErrorOr cur...

...ParseErrorOr!T(x); }

auto parserOr(I,alias f, alias g)(I i) {
  auto cur = f...

...d
import std;

struct ParseError { string msg; }

alias ParseErrorOr(T) = SumType!(ParseError,T);
auto parseErrorOr...

...dizisi, yani en büyük birim.
 */
void main()
{
  alias tür = ubyte;

// A- 2 sat, 3 süt...

...14203 "Fix Issue 23178 - Unknown error using alias to `__traits` evaluated as expression" was merged...

...14203 "Fix Issue 23178 - Unknown error using alias to `__traits` evaluated as expression" fixing this...