• Daniel Kozak (16/16) Feb 13 2013 Hi all,
• Jacob Carlborg (7/21) Feb 13 2013 How would this work. What if there's another struct in scope that has
• Daniel Kozak (4/30) Feb 13 2013 my fault, entity3 should be anonymous struct not type of Entity,
• simendsjo (7/23) Feb 13 2013 entity3: What should the compiler do? Guess the type as long as
• Daniel Kozak (33/37) Feb 13 2013 No, I dont want named parameters, because I agree it is not good

"Daniel Kozak" <kozzi11 gmail.com> writes:

Hi all,

I play with structs and UDAs today, and I found out some 
limitation:

struct Entity
{
	string name;
}

void main(string[] args)
{
   Entity entity = {name : "Name"}; // static initialization by 
name
   auto entity2 = Entity(); // default initialization
   auto entity3 = {name : "Name"}; // should be nice to have
   auto entity4 = Entity(name : "Name"); // and this would be 
useful too. Eg.: for UDAs  Entity(name : "EntityName")
}

Jacob Carlborg <doob me.com> writes:

On 2013-02-13 09:49, Daniel Kozak wrote:
 Hi all,

 I play with structs and UDAs today, and I found out some limitation:

 struct Entity
 {
      string name;
 }

 void main(string[] args)
 {
    Entity entity = {name : "Name"}; // static initialization by name
    auto entity2 = Entity(); // default initialization
    auto entity3 = {name : "Name"}; // should be nice to have

How would this work. What if there's another struct in scope that has 
the same member(s)?

    auto entity4 = Entity(name : "Name"); // and this would be useful
 too. Eg.: for UDAs  Entity(name : "EntityName")
 }

Check my proposal for anonymous structs:

http://forum.dlang.org/thread/kfbnuc$1cro$1 digitalmars.com#post-kfbnuc:241cro:241:40digitalmars.com

-- 
/Jacob Carlborg

"Daniel Kozak" <kozzi11 gmail.com> writes:

On Wednesday, 13 February 2013 at 10:38:23 UTC, Jacob Carlborg 
wrote:
 On 2013-02-13 09:49, Daniel Kozak wrote:
 Hi all,

 I play with structs and UDAs today, and I found out some 
 limitation:

 struct Entity
 {
     string name;
 }

 void main(string[] args)
 {
   Entity entity = {name : "Name"}; // static initialization by 
 name
   auto entity2 = Entity(); // default initialization
   auto entity3 = {name : "Name"}; // should be nice to have

 How would this work. What if there's another struct in scope 
 that has the same member(s)?

   auto entity4 = Entity(name : "Name"); // and this would be 
 useful
 too. Eg.: for UDAs  Entity(name : "EntityName")
 }

 Check my proposal for anonymous structs:

 http://forum.dlang.org/thread/kfbnuc$1cro$1 digitalmars.com#post-kfbnuc:241cro:241:40digitalmars.com

my fault, entity3 should be anonymous struct not type of Entity, 
just like your proposal

"simendsjo" <simendsjo gmail.com> writes:

On Wednesday, 13 February 2013 at 08:49:41 UTC, Daniel Kozak 
wrote:
 Hi all,

 I play with structs and UDAs today, and I found out some 
 limitation:

 struct Entity
 {
 	string name;
 }

 void main(string[] args)
 {
   Entity entity = {name : "Name"}; // static initialization by 
 name
   auto entity2 = Entity(); // default initialization
   auto entity3 = {name : "Name"}; // should be nice to have
   auto entity4 = Entity(name : "Name"); // and this would be 
 useful too. Eg.: for UDAs  Entity(name : "EntityName")
 }


entity3: What should the compiler do? Guess the type as long as 
it has a constructor with "name"?
entity4: You're talking about static opCall and named parameters. 
I'm pretty sure named parameters have been rejected as parameter 
names would be part of the public interface for functions.

"Daniel Kozak" <kozzi11 gmail.com> writes:

 entity4: You're talking about static opCall and named 
 parameters. I'm pretty sure named parameters have been rejected 
 as parameter names would be part of the public interface for 
 functions.

No, I dont want named parameters, because I agree it is not good 
idea to have parameter names part of public interface. I speak 
about syntax sugar, how to do this:

module main;
import std.stdio;

struct Entity
{
     string name;
}

static Entity entity = {name: "EntityName"};

 entity
class A {
}

void main(string[] args)
{
     auto attributes = __traits(getAttributes, A);
     writeln(attributes[0]);
}


by this code:

module main;
import std.stdio;

struct Entity
{
     string name;
}

 Entity(name : "EntityName")
class A {
}

void main(string[] args)
{
     auto attributes = __traits(getAttributes, A);
     writeln(attributes[0]);
}