[Issue 15064] [CTFE] std.range.enumerate is not CTFE-able

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=15064

b2.temp at gmx.com changed:

           What    |Removed                     |Added
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                 CC|                            |b2.temp at gmx.com

--- Comment #4 from b2.temp at gmx.com ---
Remove the field names of the Tuple used in enumerate and it works i.e change
the definition

"alias ElemType = Tuple!(Enumerator, "index", ElementType!Range, "value");"

to

"alias ElemType = Tuple!(Enumerator, ElementType!Range);"

(+ fix the unittests that use the field name by using indexers as postfix)

and it works, although No idea why. This is just a clue, not a fix. Removing
the field names would break code.

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