• Marc (4/9) Dec 15 2017 then return only ["name", "age"] rather ["name, "age", "ctor",
• Jonathan M Davis (8/19) Dec 15 2017 Try __traits(derivedMembers, Person).
• Marc (8/30) Dec 16 2017 It derivedMembers worked but I didn't understand how so. It
• Jonathan M Davis (7/42) Dec 16 2017 Every class in D other than Object is derived from another class. So, I

Marc <jckj33 gmail.com> writes:

how do I from class:

 class Person {
  string name;
  int age;
 }

do:

 auto c = [__traits(allMembers, Person)];

then return only ["name", "age"] rather ["name, "age", "ctor", 
"toString" ... ]?

Jonathan M Davis <newsgroup.d jmdavisprog.com> writes:

On Saturday, December 16, 2017 04:01:10 Marc via Digitalmars-d-learn wrote:
 how do I from class:
 class Person {

  string name;
  int age;

 }

 do:
 auto c = [__traits(allMembers, Person)];

 then return only ["name", "age"] rather ["name, "age", "ctor",
 "toString" ... ]?

Try __traits(derivedMembers, Person).

https://dlang.org/spec/traits.html#derivedMembers

Depending on what you want though, it's not all that uncommon to use a
variety of traits to filter the list down to whatever it is that you
actually want. std.traits and std.meta are your friends in addition to
__traits.

- Jonathan M Davis

Marc <jckj33 gmail.com> writes:

On Saturday, 16 December 2017 at 07:23:38 UTC, Jonathan M Davis 
wrote:
 On Saturday, December 16, 2017 04:01:10 Marc via 
 Digitalmars-d-learn wrote:
 how do I from class:
 class Person {

  string name;
  int age;

 }

 do:
 auto c = [__traits(allMembers, Person)];

 then return only ["name", "age"] rather ["name, "age", "ctor", 
 "toString" ... ]?

 Try __traits(derivedMembers, Person).

 https://dlang.org/spec/traits.html#derivedMembers

 Depending on what you want though, it's not all that uncommon 
 to use a variety of traits to filter the list down to whatever 
 it is that you actually want. std.traits and std.meta are your 
 friends in addition to __traits.

 - Jonathan M Davis

It derivedMembers worked but I didn't understand how so. It 
returned the proper array ["name", "age", "this"] but how are 
them derived? or it's D's design that every class is implicitily 
derived from a "main objet"?
Thanks for your suggeston on std.traits and std.meta, I didn't 
know about the last one.

Jonathan M Davis <newsgroup.d jmdavisprog.com> writes:

On Saturday, December 16, 2017 15:28:46 Marc via Digitalmars-d-learn wrote:
 On Saturday, 16 December 2017 at 07:23:38 UTC, Jonathan M Davis

 wrote:
 On Saturday, December 16, 2017 04:01:10 Marc via

 Digitalmars-d-learn wrote:
 how do I from class:
 class Person {

  string name;
  int age;

 }

 do:
 auto c = [__traits(allMembers, Person)];

 then return only ["name", "age"] rather ["name, "age", "ctor",
 "toString" ... ]?

 Try __traits(derivedMembers, Person).

 https://dlang.org/spec/traits.html#derivedMembers

 Depending on what you want though, it's not all that uncommon
 to use a variety of traits to filter the list down to whatever
 it is that you actually want. std.traits and std.meta are your
 friends in addition to __traits.

 - Jonathan M Davis

 It derivedMembers worked but I didn't understand how so. It
 returned the proper array ["name", "age", "this"] but how are
 them derived? or it's D's design that every class is implicitily
 derived from a "main objet"?
 Thanks for your suggeston on std.traits and std.meta, I didn't
 know about the last one.

Every class in D other than Object is derived from another class. So, I
assume that the derived in derivedMembers was chosen to indicate that it
didn't include any members from base classes. So, it's not that the members
are derived from anything; it's that the members come from the derived
class.

- Jonathan M Davis