• Andrej Mitrovic <andrej.mitrovich gmail.com> Jul 06 2011
• "Daniel Murphy" <yebblies nospamgmail.com> Jul 06 2011
• Jacob Carlborg <doob me.com> Jul 06 2011
• Kai Meyer <kai unixlords.com> Jul 07 2011

Andrej Mitrovic <andrej.mitrovich gmail.com> writes:

void foo(){};
void bar(){};

void main()
{
    auto funcs = [&foo, &bar];
}

I'm using this in a foreach loop and invoking each function with some
predefined arguments. But I'd also like to extract the name of each
function because each function does some image processing and then I
save that image to disk.

Basically I want to do:

    foreach (func; funcs)
    {
        func(arguments..);
        writeToFile(func.stringof);
    }

Obviously I can't use arrays since they don't hold any name
information, they just store the pointers.

Can I use tuples somehow? The functions are predefined, I just need to
iterate through all of them and call them and extract their name.

"Daniel Murphy" <yebblies nospamgmail.com> writes:

Maybe something like TypeTuple!(foo ,bar) will work.


"Andrej Mitrovic" <andrej.mitrovich gmail.com> wrote in message 
news:mailman.1452.1310006894.14074.digitalmars-d-learn puremagic.com...
 void foo(){};
 void bar(){};

 void main()
 {
    auto funcs = [&foo, &bar];
 }

 I'm using this in a foreach loop and invoking each function with some
 predefined arguments. But I'd also like to extract the name of each
 function because each function does some image processing and then I
 save that image to disk.

 Basically I want to do:

    foreach (func; funcs)
    {
        func(arguments..);
        writeToFile(func.stringof);
    }

 Obviously I can't use arrays since they don't hold any name
 information, they just store the pointers.

 Can I use tuples somehow? The functions are predefined, I just need to
 iterate through all of them and call them and extract their name. 

Jacob Carlborg <doob me.com> writes:

On 2011-07-07 04:47, Andrej Mitrovic wrote:
 void foo(){};
 void bar(){};

 void main()
 {
      auto funcs = [&foo,&bar];
 }

 I'm using this in a foreach loop and invoking each function with some
 predefined arguments. But I'd also like to extract the name of each
 function because each function does some image processing and then I
 save that image to disk.

 Basically I want to do:

      foreach (func; funcs)
      {
          func(arguments..);
          writeToFile(func.stringof);
      }

 Obviously I can't use arrays since they don't hold any name
 information, they just store the pointers.

 Can I use tuples somehow? The functions are predefined, I just need to
 iterate through all of them and call them and extract their name.


template functionNameOf (alias func)
{
     enum functionNameOf = (&func).stringof[2 .. $];
}

-- 
/Jacob Carlborg

Kai Meyer <kai unixlords.com> writes:

On 07/06/2011 08:47 PM, Andrej Mitrovic wrote:
 void foo(){};
 void bar(){};

 void main()
 {
      auto funcs = [&foo,&bar];
 }

 I'm using this in a foreach loop and invoking each function with some
 predefined arguments. But I'd also like to extract the name of each
 function because each function does some image processing and then I
 save that image to disk.

 Basically I want to do:

      foreach (func; funcs)
      {
          func(arguments..);
          writeToFile(func.stringof);
      }

 Obviously I can't use arrays since they don't hold any name
 information, they just store the pointers.

 Can I use tuples somehow? The functions are predefined, I just need to
 iterate through all of them and call them and extract their name.


I assume the function signatures are all the same? Then you can do an 
associative array:

import std.stdio;
int func1(int a) {return a + 1;}
int func2(int a) {return a + 2;}
int func3(int a) {return a + 3;}
void main()
{
     int function (int)[string] funcs = ["func1":&func1, \
			"func2":&func2, "func3":&func3];
     foreach(name, func; funcs)
         writef("%s %d\n", name, func(1));
}


Perhaps a mixin would be helpful to limit cut-and-paste issues. If they 
are methods that are part of a class, you would need to declare them as 
"int delegate (int)[string] funcs".