Proposed Phobos equivalent of wcswidth()

[Dmitry Olshansky]

On Friday, 19 January 2018 at 19:33:28 UTC, H. S. Teoh wrote:
> On Thu, Jan 18, 2018 at 06:42:26PM +0000, Dmitry Olshansky via 
> Digitalmars-d wrote: [...]
>> Also forgot to mention that can pass BitPacked!(ubyte,2) to 
>> Trie template as value type to use 2 bit per value. Should 
>> reduce your width table 4-fold.  Just saying;)
>
> Thanks for the tip!  Indeed, the table size was reduced 4-fold. 
> Awesome.
>
> However, now I'm finding that it no longer works properly when 
> loaded from the precompiled data.  It appears to have something 
> to do with the default value for the width table being 1 rather 
> than ubyte.init, and so far I couldn't figure out how to get 
> the Trie ctor that takes .offsets, .sizes, .data to specify a 
> default value.

Why would you need a default in a low-level construction? I think 
it naturally takes the tables with whatever was stored in there. 
There is no processing.

So the default has to be explicitly stored during building of 
trie.

> So now the trie is returning the wrong value for certain dchar 
> ranges. :-(
>