Hi,

All is in the title.
I need this to do a tupleof enhanced, that mean:
   - .tupleof need an instance me i want to do this on type
diretcly
   - .tupleof do not bind to member name i need this


for this i strat to this code:

import std.stdio;
import std.typecons;
import std.conv;

struct Coord
{
     int x;
     int y;
     int z;
}

template toTuple(T){
     static string maker(){
         string statement = "alias Tuple!(";
         foreach(const memberName; __traits(allMembers, T)){
             statement ~=  to!string(typeof(__traits(getMember, T,
memberName)))  ~ ",\"" ~ memberName ~ "\", " ;
         }
         statement = statement[O..$-1] ~ ") t;" ; // $-1 to remove
extra comma
         return statement;
     }
     enum toTuple = mixin( maker() );
}


but that fail on typeof(__traits(getMember, T, memberName) becase
that return a type and not a string.


Thaks for your help

On Sunday, 1 June 2014 at 13:34:20 UTC, bioinfornatics wrote:
> Hi,
>
> All is in the title.
> I need this to do a tupleof enhanced, that mean:
>    - .tupleof need an instance me i want to do this on type
> diretcly
>    - .tupleof do not bind to member name i need this
>
>
> for this i strat to this code:
>
> import std.stdio;
> import std.typecons;
> import std.conv;
>
> struct Coord
> {
>      int x;
>      int y;
>      int z;
> }
>
> template toTuple(T){
>      static string maker(){
>          string statement = "alias Tuple!(";
>          foreach(const memberName; __traits(allMembers, T)){
>              statement ~=  to!string(typeof(__traits(getMember, T,
> memberName)))  ~ ",\"" ~ memberName ~ "\", " ;
>          }
>          statement = statement[O..$-1] ~ ") t;" ; // $-1 to remove
> extra comma
>          return statement;
>      }
>      enum toTuple = mixin( maker() );
> }
>
>
> but that fail on typeof(__traits(getMember, T, memberName) becase
> that return a type and not a string.
>
>
> Thaks for your help

I find this: typeid(typeof(__traits(getMember, T,
memberName))).toString
but that do not works at compile time.

Error: static variable typeid(int) cannot be read at compile time

Maybe http://dlang.org/property.html#stringof helps.

I bam close to be done

import std.stdio;
import std.typecons;
import std.conv;

struct Coord
{
     int x;
     int y;
     int z;
}

template toTuple(T){
     static string maker(){
         string statement = "alias Tuple!(";
         foreach(const memberName; __traits(allMembers, T)){
             statement ~=  typeof(__traits(getMember, T,
memberName)).stringof  ~ ",\"" ~ memberName ~ "\", " ;
         }
         statement = statement[0..$-2] ~ ") toTuple;" ; // $-1 to
remove extra comma
         return statement;
     }
     pragma( msg, maker() );
     mixin( maker() );
}

void main()
{
     //auto a = c.tupleof;
     auto a = toTuple!Coord;
}



$ ldc2 -w -of"testTupleof" "testTupleof.d"
alias Tuple!(int,"x", int,"y", int,"z") toTuple;
testTupleof.d(29): Error: type Tuple!(int, "x", int, "y", int,
"z") has no value

On Sunday, 1 June 2014 at 13:52:27 UTC, Tobias Pankrath wrote:
> Maybe http://dlang.org/property.html#stringof helps.

yes that help a lot thanks

On Sunday, 1 June 2014 at 13:58:03 UTC, bioinfornatics wrote:
> On Sunday, 1 June 2014 at 13:52:27 UTC, Tobias Pankrath wrote:
>> Maybe http://dlang.org/property.html#stringof helps.
>
> yes that help a lot thanks

End of spam ( joke ^^)


I found it :-)

import std.stdio;
import std.typecons;
import std.conv;

struct Coord
{
     int x;
     int y;
     int z;
}

template toTuple(T){
     static string maker(){
         string statement = "alias toTuple = Tuple!(";
         foreach(const memberName; __traits(allMembers, T)){
             statement ~=  typeof(__traits(getMember, T,
memberName)).stringof  ~ ",\"" ~ memberName ~ "\", " ;
         }
         statement = statement[0..$-2] ~ ") ;" ; // $-1 to remove
extra comma
         return statement;
     }
     pragma( msg, maker() );
     mixin( maker() );
}


void main()
{
     Coord c;
     alias A = toTuple!Coord;
     A a;
     a[0] = 1;
     a.x = 1;
}