Arrays of functions, function signatures and template instantiation

[anonymous]

On Monday, 29 April 2013 at 23:49:18 UTC, JR wrote:
[...]
> http://dpaste.dzfl.pl/9273fb92
>
> Can't it be done neater than this? It *does* work now, but it's 
> incredibly hacky and I'm not satisfied with it. The whole 
> 'passing a function pointer to a function that casts the 
> signature and invokes it' deal makes me cringe. :>

To get rid of the cast:

13c13
<       void applyFunc(F* func, E[I][T] matrix) {
---
>       void applyFunc(F func, E[I][T] matrix) {
16c16
<                               func(major, minor, &element);
---
>                               func(major, minor, element);
29,30c29,30
<       void run(T major, I minor, F* func) {
<               (cast(void function(T,I))*func)(major, minor);
---
>       void run(T major, I minor, F func) {
>               func(major, minor);
52c52
<       alias
MatrixWalker!(typeof(runner),typeof(funcyMatrix)).applyFunc apply;
---
>       alias 
> MatrixWalker!(typeof(&runner),typeof(funcyMatrix)).applyFunc 
> apply;