Hi Estaban,
I think the first time I saw this pattern was in ReStore on Dolphin
Smalltalk. I didn't understand it's implementation back then. I assume
that it's similar to what I described though. But having a Smalltalk
block automagically creating the equivalent SQL SELECT expression was
like black magic at that time :-)
CU,
Udo
On 23.09.14 04:15, Esteban A. Maringolo wrote:
Excellent article.
I think GLORP uses a similar technique to setup its expressions, and
also have issues with #and:/#or: selectors due to inlining, so it uses
AND:/#OR: instead.
Regards!
Esteban A. Maringolo
pd: Your blog and it's choosen topic made me remember
http://use-the-index-luke.com/
2014-09-22 20:48 GMT-03:00 Udo Schneider <udo.schnei...@homeaddress.de>:
All,
I just finished a blog entry. It shows how to use Smalltalk blocks as
parsers/translators. E.g. translating a Block
[:customer | (customer joinDate year is: Date today year)]
into an SQL-like String
(YEAR(customers.joinDate) = 2014)
The SQL stuff is just an example - you can create nearly any output.
Check out
http://readthesourceluke.blogspot.de/2014/09/block-translators-parsing-magic.html
Maybe that's old stuff for some of you - but I hope it's interesting for some
at least :-)
Comments and feedback appreciated.
CU,
Udo
