Tuple slicing fails

[Erik Baklund]

Bill Baxter Wrote:

> Erik Baklund wrote:
> > Hi,
> > 
> > I am trying to understand tuples.
> > Does anybody know why line 11 below fail?
> > Is it conceptually wrong or is it a compiler glitch?
> > 
> > Erik
> > 
> >  1	import std.stdio;
> >  2
> >  3
> >  4	template Tuple1(E...) 
> >  5	{ 
> >  6		alias E Tuple1; // Works
> >  7	}	
> >  8
> >  9	template Tuple2(E...) 
> > 10	{ 
> > 11		alias E[0..length] Tuple2;  // Sematicly the same (?) but fails
> > 12	}	
> > 13
> > 14	int main (char[][] args)
> > 15	{
> > 16		writefln(Tuple1!(3, 7L, 6.8));   
> > 17		writefln(Tuple2!(3, 7L, 6.8));   
> > 18
> > 19		return 0;
> > 20	}
> > 
> > 
> > a.d(11): tuple E is used as a type
> > a.d(11): Error: can only slice tuple types, not void
> > a.d(17): template instance a.Tuple2!(3,7L,6.8) error instantiating
> 
> I think your DMD is too old.  Works fine here with v1.014.  There were a 
> number of problems like that in older versions of dmd.
> 
> --bb


Thank you Bill,

Good to know that I am on the right track with respect to tuples.
I was running of the posted stable version 1.010 at  http://ftp.digitalmars.com/dmd.zip.
Based on your feedback, I will try the 1.014.

Kind regards,
Erik