foreach, an analogy

[clayasaurus]

Bill Baxter wrote:
> ... long analogy

Here is my view on foreach_reverse

1) I really like the idea of foreach being the defacto-iterator for D

2) foreach_reverse allows me to implement an opApply function to my 
doubly linked list template for not only forward iteration, but 
backwards iteration as well! Otherwise, I'd have to pass it a 
&list.reverse delegate which is hackish.

Although I wonder if one could just pass in an extra parameter in the 
opApply function to specify forward, reverse, unordered, ordered. like...

foreach(int b; array; "reverse")
foreach(int b; array); // assume forward, or whatever the default is
foreach(int b; array; "ordered")
foreach(int b; array; "unordered")

I like the functionality of foreach_reverse, I just think there might be 
a more flexible way to implement, and in a way so that it makes sense to 
anyone who understands the D language. (I'm not saying that 
foreach_reverse is not understandable, I'm just not very excited about 
allowing the programmer to program their own flow control loop 
statements like forever {} ).