[Issue 23665] Add traits to retrieve template parameter information

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23665

Bolpat <qs.il.paperinik at gmail.com> changed:

           What    |Removed                     |Added
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            Summary|Add traits                  |Add traits to retrieve
                   |                            |template parameter
                   |                            |information

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