[Issue 4639] Built-in primitive types cannot be used as template alias parameters

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=4639



--- Comment #3 from Don <clugdbug at yahoo.com.au> 2010-08-13 12:02:20 PDT ---
(In reply to comment #2)
> (In reply to comment #1)
> > This is not a bug. From the spec:
> > "Alias parameters enable templates to be parameterized with any type of D
> > symbol, including global names, local names, typedef names, module names,
> > template names, and template instance names. Literals can also be used as
> > arguments to alias parameters."
> > 
> > Built-in types are not on that list.
> 
> 
> Hmm.. I don't think so.
> 
> "parameterized with any type of D symbol, including ..."
> 
> Why are not built-in primitive types included in "any type of D symbol"?
> Is there any particular reason that user defined type names (like struct names)
> are allowed but built-in type names are not allowed? I think such a limitation
> is not natural.

I basically agree with you, but syntactically, they are quite different, and
it's an intentional decision by Walter. See for example bug 1341.

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