14 Aug
2003
14 Aug
'03
4:59 a.m.
oleg@pobox.com wrote:
If I may interject, that's precisely how a Scheme DB interface is designed. The main function is a left-fold. Not quite though: it provides for a premature termination:
A major procedure: DB1:fold-left PROC INITIAL-SEED QUERY-OBJECT
Premature termination sounds like a useful property. I can see two ways this could be done: keep the previous signature, and use an exception to exit early, or add a boolean return value like the scheme version: doquery :: Process -> String -> (a -> b -> IO (b,Bool)) -> b -> IO b Any opinions on which alternative wouuld be preferable? Tim