[Issue 1012] cannot instantiate template with no or default arguments without !()

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=1012

Mathias LANG <pro.mathias.lang at gmail.com> changed:

           What    |Removed                     |Added
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             Status|NEW                         |RESOLVED
                 CC|                            |pro.mathias.lang at gmail.com
         Resolution|---                         |WONTFIX

--- Comment #12 from Mathias LANG <pro.mathias.lang at gmail.com> ---
The current error message is a bit better:
> test.d(9): Error: template class test.Bar(T = int) is used as a type without instantiation; to instantiate it use Bar!(arguments)

Given that:
- This bug has been open for 12 years
- There is no consensus in the favor of this enhancement
- Walter Bright has spoken against it

It should clearly go through the DIP process to properly assess if there would
be any corner cases, semantic or parsing wise.

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