Invariant strings on Dr. Dobb's

[Walter Bright]

BCS wrote:
> 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).

All I meant was that a common operation is concatenating - an operation 
that in C is usually done by allocating a mutable buffer, then copying 
the strings into it.