26 Feb
2010
26 Feb
'10
10:59 a.m.
Simon Marlow wrote:
While I agree with these points, I was converted to record punning (actually record wildcards) when I rewrote the GHC IO library. Handle is a record with 12 or so fields, and there are literally dozens of functions that start like this:
flushWriteBuffer :: Handle -> IO () flushWriteBuffer Handle{..} = do
if I had to write out the field names I use each time, and even worse, think up names to bind to each of them, it would be hideous.
What about using field names as functions? flushWriteBuffer h@(Handle {}) = do ... buffer h ... Of course, you always have to drag h around. Regards, Heinrich Apfelmus -- http://apfelmus.nfshost.com