• John Colvin (5/5) May 20 2014 Given a range with element type char, what's the best way of
• Justin Whear (6/12) May 20 2014 Foreach on narrow strings automatically decodes, so it's as simple as:
• monarch_dodra (4/10) May 20 2014 I think the point of his question is if you have an actual
• monarch_dodra (4/9) May 20 2014 FWI, Walter just wrote "byDchar", that does what you want:
• John Colvin (5/16) May 20 2014 Sweet! I was vaguely aware of this but didn't know what the

"John Colvin" <john.loughran.colvin gmail.com> writes:

Given a range with element type char, what's the best way of 
iterating over it by code-point, without filling an array first?

Related to this: What's the status of std.utf and std.encoding? 
The comments in std.encoding say that some functions supersede 
their std.utf counterparts.

Justin Whear <justin economicmodeling.com> writes:

On Tue, 20 May 2014 17:59:07 +0000, John Colvin wrote:

 Given a range with element type char, what's the best way of iterating
 over it by code-point, without filling an array first?
 
 Related to this: What's the status of std.utf and std.encoding? The
 comments in std.encoding say that some functions supersede their std.utf
 counterparts.

Foreach on narrow strings automatically decodes, so it's as simple as:

// assume UTF-8 encoded
char[] myData = ...
foreach (dchar codePoint; myData)
   ...

"monarch_dodra" <monarchdodra gmail.com> writes:

On Tuesday, 20 May 2014 at 18:06:09 UTC, Justin Whear wrote:
 Foreach on narrow strings automatically decodes, so it's as 
 simple as:

 // assume UTF-8 encoded
 char[] myData = ...
 foreach (dchar codePoint; myData)
    ...

I think the point of his question is if you have an actual 
non-array range of chars, in which case foreach does NOT decode. 
It simply iterates.

"monarch_dodra" <monarchdodra gmail.com> writes:

On Tuesday, 20 May 2014 at 17:59:09 UTC, John Colvin wrote:
 Given a range with element type char, what's the best way of 
 iterating over it by code-point, without filling an array first?

 Related to this: What's the status of std.utf and std.encoding? 
 The comments in std.encoding say that some functions supersede 
 their std.utf counterparts.

FWI, Walter just wrote "byDchar", that does what you want:
https://github.com/D-Programming-Language/phobos/pull/2043

It's about to be merged.

"John Colvin" <john.loughran.colvin gmail.com> writes:

On Tuesday, 20 May 2014 at 19:58:17 UTC, monarch_dodra wrote:
 On Tuesday, 20 May 2014 at 17:59:09 UTC, John Colvin wrote:
 Given a range with element type char, what's the best way of 
 iterating over it by code-point, without filling an array 
 first?

 Related to this: What's the status of std.utf and 
 std.encoding? The comments in std.encoding say that some 
 functions supersede their std.utf counterparts.

 FWI, Walter just wrote "byDchar", that does what you want:
 https://github.com/D-Programming-Language/phobos/pull/2043

 It's about to be merged.

Sweet! I was vaguely aware of this but didn't know what the 
progress was. Thanks :)

In the mean time I hand-rolled my own, but I'm sure Walter's is 
infinitely better so I'll swap over ASAP.