[Issue 16666] type inside 'static if' can't be used before import

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=16666

kinke <kinke at gmx.net> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |industry
                 CC|                            |kinke at gmx.net
           Severity|normal                      |critical

--- Comment #3 from kinke <kinke at gmx.net> ---
Raising importance to critical, as we seem to have hit the same problem with
v2.100, dustmited to a trivial

```
// crypto.d:
import types;
int EVP_PKEY_derive_init_ex(EVP_KEYEXCH*);

// types.d:
import crypto;
version (WORKING)
    struct EVP_KEYEXCH;
else static if (true)
    struct EVP_KEYEXCH;
```

`dmd -o- types.d` fails with an 'undefined identifier EVP_KEYEXCH' error;
`-version=WORKING` makes it work, showing the difference of static-if vs.
version condition. Compiling the other module (`dmd -o- crypto.d`) works fine.

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