• Jonathan Crapuchettes (4/4) Mar 25 2013 Is there a way to get the names of the fields in a named tuple? It looks...
• Jacob Carlborg (4/6) Mar 26 2013 Perhaps "fieldSpecs".
• Jonathan Crapuchettes (6/11) Mar 26 2013 Well, that gets you a FieldSpec template which would work except that it...
• cal (24/29) Mar 26 2013 Not sure this qualifies as clean, but it's an option:

Jonathan Crapuchettes <jcrapuchettes gmail.com> writes:

Is there a way to get the names of the fields in a named tuple? It looks 
like the names are actually aliases.

Thanks,
JC

Jacob Carlborg <doob me.com> writes:

On 2013-03-25 23:58, Jonathan Crapuchettes wrote:
 Is there a way to get the names of the fields in a named tuple? It looks
 like the names are actually aliases.

Perhaps "fieldSpecs".

-- 
/Jacob Carlborg

Jonathan Crapuchettes <jcrapuchettes gmail.com> writes:

On Tue, 26 Mar 2013 10:13:03 +0100, Jacob Carlborg wrote:

 On 2013-03-25 23:58, Jonathan Crapuchettes wrote:
 Is there a way to get the names of the fields in a named tuple? It
 looks like the names are actually aliases.

 
 Perhaps "fieldSpecs".

Well, that gets you a FieldSpec template which would work except that it 
is private. I can get around that using the .stringof and then parsing, 
but I wish there was a cleaner way to do it. If the FieldSpec template 
was moved into the public section, it would allow for the name member to 
be accessed.

"cal" <callumenator gmail.com> writes:

On Tuesday, 26 March 2013 at 16:31:51 UTC, Jonathan Crapuchettes 
wrote:
 but I wish there was a cleaner way to do it. If the FieldSpec 
 template
 was moved into the public section, it would allow for the name 
 member to
 be accessed.


Not sure this qualifies as clean, but it's an option:

import std.typecons, std.stdio, std.traits, std.conv;

string[] tupleNames(T)()
{
     string[] names;
     uint count = 0;
     bool matchNext = false;
	foreach(m; __traits(allMembers,T))
	{
	    if (matchNext)
	    {
	        names ~= m;
	        matchNext = false;
	        count ++;
	    }

	    if (m == "_" ~ count.to!string)
             matchNext = true;
	}
	return names;

}

pragma(msg, tupleNames!(Tuple!(int,"a",float,"b",string,"c")));

void main(){ }