Function Pointers with Type T

[amparacha via Digitalmars-d]

thankx but all of these are not working
On Monday, 15 September 2014 at 16:51:24 UTC, evilrat wrote:
> On Monday, 15 September 2014 at 16:28:19 UTC, amparacha wrote:
>> Can anyone looks at the following code to fix it.I am having 
>> error when using pointers to functions with argument of type 
>> T.This is a small portion of a program doing a generic quick 
>> sort by passing a comparison function as an argument.
>>
>> import std.stdio;
>>
>>
>> int main(){
>>
>> return 0;
>> }
>>
>> bool comp(T)(T left,T right){
>> //some comparison criteria
>> return false;
>> }
>>
>>
>> void sort(T)(T[]list,int left,int right)
>> {
>> int spiltPoint;
>> bool function(T)(T val1,T val2) ptr=∁
>> spiltPoint=partition(list,ptr,left,right);	
>> }
>>
>> int partition(T)(T[]list,bool function(T)(T val1,T 
>> val2)ptr,int left,int right){
>>
>> return 2;
>>
>> }
>
> this T function is just short form of template which expands to
> ----
> template partition(T)
> {
>  int partition(T[] list, bool function(T val1, T val2) ptr, int 
> left, int right)
>  {
>   return 2;
>  }
> }
> ----
> cannot alias template function, so in fact the closest thing is 
> use alias template parameter. try this(not tested):
> ---------------
> import std.stdio;
>
>
> void main(){
> cast(void)0;
> }
>
> bool comp(T)(T left, T right){
> //some comparison criteria
> return false;
> }
>
> void sort(T)(T[]list,int left,int right)
> {
> int spiltPoint;
> spiltPoint=partition!(T, comp)(list,left,right);	
> }
>
> int partition(T, alias compFunc)(T[] list, int left, int right)
> {
> return 2;
> }
>
> alias compFunc(T) = bool function (T val1,T val2) ;
> -----
> the only problem(?) involving template alias makes this 
> impossible(?) to call at run time(CTFE only)