foreach over string apparently iterates over chars by default instead of dchars. Didn't it prefer dchars?

string s="weiß";
int i;
foreach(c;s)i++;
assert(i==5);

On 2014-05-24 12:46, Kagamin wrote:
> foreach over string apparently iterates over chars by default instead of
> dchars. Didn't it prefer dchars?
>
> string s="weiß";
> int i;
> foreach(c;s)i++;
> assert(i==5);


A string is defined by:
alias string = immutable(char)[];

It doesn't add anything to that type (unless you import a library like std.algorithm, which adds many "methods" thanks to UFCS and generic functions)

I believe you are looking for dstring which is defined by:
alias dstring = immutable(dchar)[];

dstring s="weiß";
int i;
foreach(c;s)i++;
assert(i==4);

On 05/24/2014 09:46 AM, Kagamin wrote:
> foreach over string apparently iterates over chars by default instead of
> dchars. Didn't it prefer dchars?

I don't think so. The range algorithms iterate by dchar though.

>
> string s="weiß";
> int i;
> foreach(c;s)i++;
> assert(i==5);

Ali

On Saturday, 24 May 2014 at 16:46:42 UTC, Kagamin wrote:
> foreach over string apparently iterates over chars by default instead of dchars. Didn't it prefer dchars?
>
> string s="weiß";
> int i;
> foreach(c;s)i++;
> assert(i==5);

Nope.

if you use foreach(dchar c; s) you will get the iteration by code-point you are looking for.

Ah, yeah, found this: http://forum.dlang.org/thread/mailman.266.1319139465.24802.digitalmars-d@puremagic.com

On Saturday, 24 May 2014 at 18:18:37 UTC, John Colvin wrote:
> if you use foreach(dchar c; s) you will get the iteration by code-point you are looking for.

Actually I was trying to prevent decoding :) It just occurred to me it can be tricky in generic code.