[Dune] [#829] Dune::array<T, n> has 'int' as the type for n while std::array has 'size_t'

[Dune]

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FS#829 - Dune::array<T,n> has 'int' as the type for n while std::array has 'size_t'
User who did this: Jö Fahlke (joe)
Task details edited:
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Dune's replacement implementation of array is declared as

  template<class T, int n>
  struct array;

The standard implementation is however declared as

  template<class T, size_t n>
  struct array;

This is problematic, since specializing for array will not work properly:

  template<class U>
  struct hurz;

  // this will *not* match the array imported from C++0x
  template<class T, int n>
  struct hurz<array<T,n> >;

  // this will *not* match Dune's reimplementation of array
  template<class T, std::size_t n>
  struct hurz<array<T,n> >;

I am reluctant to simply change this however.  There may actually be
specialisations in Dune which assume n is an 'int'.  We should check for those
before changing this.

There may also be similar specializations in user modules, but I guess there
is little we can do about those.

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