Invariant strings on Dr. Dobb's

[BCS]

Reply to Walter,

> BCS wrote:
> 
>> And on the content; you mention concatenation as working on invariant
>> strings. I assume this is because you generally can't concatenate in
>> place anyway?
>> 
> I'm not sure what you mean.
> 

You say that the common ops generally don't mutate the data and then list 
"moving references around, slicing, and concatenating". I guess my thought 
is that the first two are a bit more self explanatory than the last. Clearly 
1 & 2 are non mutating but, a guy who is a few Lattes behind might not notice 
that because you, in general, don't known what comes after a string, if you 
want to extend a string (for concatenating), you need to allocate new ram 
for it, thus leaving the first blocks untouched. (I'm not thinking specific 
to D here).