[Issue 21805] Allow conditional expression in types

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21805

Basile-z <b2.temp at gmx.com> changed:

           What    |Removed                     |Added
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                 CC|                            |b2.temp at gmx.com
            Summary|Allow trinary expression in |Allow conditional
                   |types                       |expression in types

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