template type deduction of static 2d arrays

[Rikki Cattermole via Digitalmars-d-learn]

On 25/10/2014 11:32 a.m., uri wrote:
> Hi All,
>
> I was wondering why in the code below f1() works but f2 template version
> called in the same manner does not. Is there a good reason from a
> language/compiler perspective?
>
> Thanks.
> uri
>
>
> ---
> auto f1(int[2][2] m)
> {
>      return m[0][0]*m[1][1]-m[0][1]*m[1][0];
> }
> auto f2(T)(T[2][2] m)
> {
>      return m[0][0]*m[1][1]-m[0][1]*m[1][0];
> }
>
> void main()
> {
>      auto res = f1( [[1,2],[3,4]]); // works
>      assert(res == -2);
>
>      res = f2([[1,2],[3,4]]); // deos not work
> }
>
> Calling f2() as done above gives the following error:
>
> Error: cannot deduce function from argument types !()(int[][]),
> candidates are:
> f2(T)(T[2][2] m)

res = f2(cast(int[2][2])[[1,2],[3,4]]);
Should work.
I believe this the old nefarious type deduction problem for literal arrays.
Basically the array literals are not literally literals but instead 
normal arrays.