copy only reference rather duplicate a string in appender!string

[Neia Neutuladh]

On Tuesday, 26 December 2017 at 15:37:12 UTC, Marc wrote:
> I do build a string by coping large parts of diffrent buffers, 
> all those buffers live after the functional call, so rather 
> than duplicate those string I'd like to copy only references to 
> those parts rather duplicate every string. I combined 
> appender!string, assumeUnique() and array slices. Something 
> like this:

This depends on whether you have several variables as buffers or 
an array of buffers.

With several variables: 
http://dpldocs.info/experimental-docs/std.range.chain.html

With an array, or something else iterable: 
http://dpldocs.info/experimental-docs/std.algorithm.iteration.joiner.2.html

So you can use:

   chain(buf1, buf2, buf3);

Or:

   myBuffers = [buf1, buf2, buf3];
   joiner(myBuffers);

That produces something string-like. (A rope, but with a poor 
API.) You can iterate through it as a string, you can output it 
to a file, etc. You can't pass it to something that expects a 
string specifically; for instance, you can't return that from 
`MyClass.toString()`.