How to Instantiate struct defined in template

[Craig Dillabaugh]

Hello,
I am trying to figure out how templates work and tried to define
the
following template to define vertices of any dimension and
operations
on them.

import std.stdio;
import std.random;
import std.range;
import std.conv;
import std.math;

/*
   * T must be one of the floating point types
   *   float, double, real _ I should be enforcing this.
   */
template  vt(T)
{
    struct vertex {
      this(T[] crds...) {
        if( crds.length < 2 ) {
          throw new.Exception("To small!");
        } else {
	coords.length = crds.length;
	foreach(ref v_coord, in_coord; lockstep(coords, crds))
	{
	  v_coord = in_coord;
	}
        }
      }
      @property T x() { return coords[0];}
      @property T y() { return coords[1];}
      @property T z() { return ( coords.length < 3 ? T.nan :
coords[2] ); }
    }
	
    T euclid_dist(T a, T b) {
      T sum = 0;
      foreach( ref a_crd, ref b_crd; lockstep( a.coords, b.coords )
) {
        sum += (a_crd - b_crd)*(a_crd - b_crd );
      }
      return sqrt(sum);
    }
} //End of template

int main(string argv[] ) {
	vt!(float).vertex v1(0.0,0.0);
	vt!(float).vertex v2(3.0,4.0);
	writefln("The distance between vertex 1 and vertex 2 is ",
		vt!(float).euclid_dist(v1, v2) );
}

When I try to compile this I get the message:

vertex.d(57): Error: found 'v1' when expecting ';' following
statement
vertex.d(58): Error: found 'v2' when expecting ';' following
statement

Lines 57 and 58 are the first two lines in my main() function. I
can't figure out why, from the examples I've looked at I am using
the syntax properly, but am clearly missing something.

Also, since I don't really know what I am doing any criticisms on
how I am defining the vertex template are welcome.

Cheers,

Craig