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digitalmars.D.learn - enum and foreach

reply 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
Mar 31 2008
parent reply 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 -- GPG Public Key: http://gpg-keyserver.de/pks/lookup?op=get&search=0xDDD6D36D41911851
Apr 01 2008
parent 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.
Apr 01 2008