Template classes

[Steven Schveighoffer]

On Tue, 14 Apr 2009 17:01:28 -0400, Andrew Spott <andrew.spott at gmail.com>  
wrote:

> So, the attached is supposed to be a class that creates a vector of any  
> type (I would like it to only take numerical values (int, float, real,  
> double, etc), however, I am ok with it taking others (not that I see why  
> someone would use it that way).
>
> I tried to compile it with the following, but it won't compile.  I don't  
> really understand the errors I'm getting either.
>
> Can someone tell me what I'm doing wrong?  If you need more information,  
> let me know.
>
> -Andrew
>
> void testvector() {
> 	auto v = new Vector!(float)(3, 12.0);
> 	writefln(v.toString());
> 	int n = 0;
> 	
> 	while (n < n.size()) {
> 		v[n] = n;
> 	}
> 	
> 	writefln(v.toString());
>
> }

Try the attached (untested).

You might get some insight into how d should be written by looking at the  
changes.

BTW, if this is just an exercise fine, but your example is a completely  
redundant implementation of standard builtin arrays.

e.g., the following code does almost the same thing you are doing without  
requiring a new class:

void testvector() {
	auto v = new float[3];
	v[0..$] = 12.0;
	writefln(v);
	int n = 0;

	while(n < v.length) { // bug in original code
		v[n] = n;
		n++; // bug in original code
	}	
	
	writefln(v);
}


-Steve
-------------- next part --------------
A non-text attachment was scrubbed...
Name: vector.d
Type: application/octet-stream
Size: 505 bytes
Desc: not available
URL: <http://lists.puremagic.com/pipermail/digitalmars-d-learn/attachments/20090414/01f84557/attachment.obj>