Build your own Trie entry table

[Remi Thebault via Digitalmars-d-learn]

Hello

I want to map a dchar to its Bidi_Class.

I've built an utility that reads UnicodeData.txt into an AA and 
builds a trie with std.uni.codepointTrie from it.
I use Trie.store() to export the trie entry table into a D 
module. (I believe in a similar manner than phobos' 
unicode_tables.d)

Now I want to use this table to efficiently create a Trie in my 
code, the same way std.uni does, but found out that Trie 
constructor is private.

I've copy-pasted the asTrie function (and also TrieEntry struct) 
in my code and it works well (which I don't understand because my 
code still ends up calling the private ctor).

Can you give indication on the workflow one should follow for 
this use case?

Thanks
Rémi