Taking a function or delegate as argument.

[Jacob Carlborg]

On 2012-01-10 14:48, simendsjo wrote:
> On 10.01.2012 14:43, Mike Parker wrote:
>> On 1/10/2012 10:05 PM, simendsjo wrote:
>>> If I want to have a method taking a callback function, I have to specify
>>> if it should take a function or delegate even if I don't really care.
>>> What's the best way to accept either? I cannot see any wrapper for
>>> something like this in std.typecons.
>>
>> The simple way:
>>
>> void callback(int i, void delegate(int) dg)
>> {
>> dg(i);
>> }
>>
>> void callback(int i, void function(int) fn)
>> {
>> void wrap(int j)
>> {
>> function(j);
>> }
>> callback(i, &wrap);
>> }
>
> Yeah, but a bit tedious.. I found toDelegate:
> http://dlang.org/phobos/std_functional.html#toDelegate

Or make it a template parameter and check if it's callable using 
std.traits.isCallable.

-- 
/Jacob Carlborg