• yvad <yannurov gmail.com> Mar 31 2008
• Henning Hasemann <hhasemann web.de> Apr 01 2008
• yvad <yannurov gmail.com> Apr 01 2008

yvad <yannurov gmail.com> writes:

if there is any way to use named enum as source of foreach?
For example like

enum X {A, B, C}

foreach(x; X) ...

I have enum that can be extened in future. But I dont want to refactor sources
every time I I extend enum

Henning Hasemann <hhasemann web.de> writes:

yvad <yannurov gmail.com> wrote:
 if there is any way to use named enum as source of foreach?
 For example like
 
 enum X {A, B, C}
 
 foreach(x; X) ...
 
 I have enum that can be extened in future. But I dont want to
 refactor sources every time I I extend enum


You can do:
for(auto x = X.min; x <= X.max; x++) { ... }

But note however that this will execute your body once for each numeric
value between the lowest and the highest in your enum, not for each
defined member. ie if you do:

enum X {A=50, B=50, C=100};

The loop will be run for 50, 51, 52, ..., 99, 100.

Henning

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GPG Public Key:
http://gpg-keyserver.de/pks/lookup?op=get&search=0xDDD6D36D41911851

yvad <yannurov gmail.com> writes:

Henning Hasemann Wrote:

 yvad <yannurov gmail.com> wrote:
 if there is any way to use named enum as source of foreach?
 For example like
 
 enum X {A, B, C}
 
 foreach(x; X) ...
 
 I have enum that can be extened in future. But I dont want to
 refactor sources every time I I extend enum


 You can do:
 for(auto x = X.min; x <= X.max; x++) { ... }
 
 But note however that this will execute your body once for each numeric
 value between the lowest and the highest in your enum, not for each
 defined member. ie if you do:
 
 enum X {A=50, B=50, C=100};
 
 The loop will be run for 50, 51, 52, ..., 99, 100.
 
 Henning
 
 -- 
 GPG Public Key:
 http://gpg-keyserver.de/pks/lookup?op=get&search=0xDDD6D36D41911851
 


This the main reason for foreach.