[Issue 5059] String assignment in foreach loop breaks immutability

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=5059



--- Comment #3 from Steven Schveighoffer <schveiguy at yahoo.com> 2011-05-24 14:44:26 PDT ---
I think the better solution is to change it to const(char)[].  This better
reflects that the data may be changing between iterations.  If you are not
storing the strings from this, then it is extremely wasteful to allocate a new
memory block for each iteration.  You can always idup or dup if you want to.

Note, I think the documentation needs to specifically state it reuses the
buffer, so you should .dup or .idup if you wish to keep the data beyond the
loop iteration.

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