• bearophile (38/38) Mar 01 2013 This is derived from part of a D.learn post, maybe it's of your
• Timon Gehr (2/4) Mar 01 2013 They are not different.
• bearophile (4/5) Mar 01 2013 Really? Sorry, I don't understand.
• Timon Gehr (2/7) Mar 01 2013 According to the spec the two outputs are the same.
• Brad Anderson (4/14) Mar 01 2013 Are you saying they should output the same or that they are the
• Timon Gehr (3/17) Mar 01 2013 With a correct implementation of the language, the outputs are the same....
• bearophile (5/6) Mar 01 2013 I have filed this:

"bearophile" <bearophileHUGS lycos.com> writes:

This is derived from part of a D.learn post, maybe it's of your 
interest.

This program shows two similar versions of the same loop:


import std.stdio, std.algorithm, std.typetuple, std.range;

void main() {
     auto items = [[10, 20], [30]];

     foreach (_; 0 .. 2) {
         foreach (sub; items) {
             iota(sub.length)
             .map!((i){ writeln(sub); return 0; })
             .array();
         }
     }

     writeln();

     foreach (_; TypeTuple!(0, 1)) {
         foreach (sub; items) {
             iota(sub.length)
             .map!((i){ writeln(sub); return 0; })
             .array();
         }
     }
}


Its output:

[10, 20]
[10, 20]
[30]
[10, 20]
[10, 20]
[30]

[10, 20]
[10, 20]
[30]
[30]
[30]
[30]


Do you see why the output of the two foreach(_) is different?

Bye,
bearophile

Timon Gehr <timon.gehr gmx.ch> writes:

On 03/01/2013 11:07 PM, bearophile wrote:
 ...

 Do you see why the output of the two foreach(_) is different?

They are not different.

"bearophile" <bearophileHUGS lycos.com> writes:

Timon Gehr:

 They are not different.

Really? Sorry, I don't understand.

Bye,
bearophile

Timon Gehr <timon.gehr gmx.ch> writes:

On 03/02/2013 12:23 AM, bearophile wrote:
 Timon Gehr:

 They are not different.

 Really? Sorry, I don't understand.

 Bye,
 bearophile

According to the spec the two outputs are the same.

"Brad Anderson" <eco gnuk.net> writes:

On Friday, 1 March 2013 at 23:25:31 UTC, Timon Gehr wrote:
 On 03/02/2013 12:23 AM, bearophile wrote:
 Timon Gehr:

 They are not different.

 Really? Sorry, I don't understand.

 Bye,
 bearophile

 According to the spec the two outputs are the same.

Are you saying they should output the same or that they are the 
same?

You and I have a different definition of "same" if the latter.

Timon Gehr <timon.gehr gmx.ch> writes:

On 03/02/2013 01:17 AM, Brad Anderson wrote:
 On Friday, 1 March 2013 at 23:25:31 UTC, Timon Gehr wrote:
 On 03/02/2013 12:23 AM, bearophile wrote:
 Timon Gehr:

 They are not different.

 Really? Sorry, I don't understand.

 Bye,
 bearophile

 According to the spec the two outputs are the same.

 Are you saying they should output the same or that they are the same?

 You and I have a different definition of "same" if the latter.

With a correct implementation of the language, the outputs are the same. 
Bugs should go to the bug tracker.

"bearophile" <bearophileHUGS lycos.com> writes:

Timon Gehr:

 According to the spec the two outputs are the same.

I have filed this:
http://d.puremagic.com/issues/show_bug.cgi?id=9628

Bye,
bearophile