• macky <martin.butina gmail.com> Mar 29 2007
• Bradley Smith <digitalmars-com baysmith.com> Mar 29 2007
• macky <martin.butina gmail.com> Mar 30 2007

macky <martin.butina gmail.com> writes:

Hi all!

is there a way to get all attributes and their types in a class at runtime?
Comming from the c# world I'm missing something like meta tags [attributes] -
something like reflection. I wonder how this issue can be solved in d?

Bradley Smith <digitalmars-com baysmith.com> writes:

macky wrote:
 Hi all!
 
 is there a way to get all attributes and their types in a class at runtime?
Comming from the c# world I'm missing something like meta tags [attributes] -
something like reflection. I wonder how this issue can be solved in d?


Perhaps something like this:

import std.stdio;

class A {
   int a;
   float b;
   C c;
}

class C {
   int i;
}

void main() {
   A a = new A;
   foreach (i, attrib; a.tupleof) {
     writefln("attribute ", i, " is of type ", typeid(typeof(attrib)), " 
and value ", attrib);
   }
}

Output:

attribute 0 is of type int and value 0
attribute 1 is of type float and value nan
attribute 2 is of type attribList.C and value null

macky <martin.butina gmail.com> writes:

Thanx, this seems like a nice solution. I will look into it!

Bradley Smith Wrote:

 macky wrote:
 Hi all!
 
 is there a way to get all attributes and their types in a class at runtime?
Comming from the c# world I'm missing something like meta tags [attributes] -
something like reflection. I wonder how this issue can be solved in d?


 Perhaps something like this:
 
 import std.stdio;
 
 class A {
    int a;
    float b;
    C c;
 }
 
 class C {
    int i;
 }
 
 void main() {
    A a = new A;
    foreach (i, attrib; a.tupleof) {
      writefln("attribute ", i, " is of type ", typeid(typeof(attrib)), " 
 and value ", attrib);
    }
 }
 
 Output:
 
 attribute 0 is of type int and value 0
 attribute 1 is of type float and value nan
 attribute 2 is of type attribList.C and value null