Re: String literal as template parameter?

Alberto Ganesh Barbati wrote:

> Piotr Rak ha scritto:
>> 
>> - I should re****t error in case of "" or L""
> 
> Do we need to diagnose an error in this situation? Would expanding to
> an empty sequence be impossible or unreasonable?

I think that this also depends on how you intend to handle cases like
this:

  template <char c> T:
  T<"", "", 'a', "", ""> aCharacter:
  std::vector<int, ""> MyVec:

My call would be that an empty string-literal is disallowed if it is not
used in the context of a parameter-pack of a variadic template.
I don't know enough about the details of variadic templates to give a
firm standpoint on how to deal with empty string-literals for
parameter-packs. My initial feeling is that if empty parameter-packs
are fully defined, then it should be possible to use empty
string-literals in that context (with an expansion to an empty
parameter-pack).

> 
> Ganesh
> 

Bart v Ingen Schenau
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