On 10/8/13 7:02 AM, Jakob Ovrum wrote:
On Tuesday, 8 October 2013 at 04:37:31 UTC, Andrei Alexandrescu wrote:
So I guess it's your turn.
I was going to cook something up with `groupBy` (taken from the
still-open Phobos PR #1186) and `toTypeTuple`(from Phobos PR #1472, also
still open!), but the former isn't CTFEable. Blergh. I'm still adamant
this is the way to go, but I'm putting away the torch for now.
Fair enough. (Again, it would be unfair to compare an existing design
against a hypothetical one.) I suspect at some point you will need to
generate some custom code, which will come as a string that you need to
mixin.
But no matter. My most significant bit is, we need a trie lexer
generator ONLY from the token strings, no TK_XXX user-provided symbols
necessary. If all we need is one language (D) this is a non-issue
because the library writer provides the token definitions. If we need to
support user-provided languages, having the library manage the string ->
small integer mapping becomes essential.
Andrei
