Well, I wasn't able to reproduce the error message with the code
below. However, the error message you're getting is from GHC, not
web-routes-quasi. AFAICT, web-routes-quasi is generated the correct TH
code, and GHC is mis-diagnosing it as overlapping patterns. I think I
have had that problem before.
If you send me a test case, I can see if there is something wrong with
what web-routes-quasi is doing.
{-# LANGUAGE QuasiQuotes, TypeFamilies #-}
import Yesod.Dispatch
import Yesod.Core
data Overlap = Overlap
mkYesod "Overlap" [$parseRoutes|
/con/f Route1
/con/h Route2
/con/m/list Route3
/con/m/c Route4
|]
handleRoute1 = return ()
handleRoute2 = return ()
handleRoute3 = return ()
handleRoute4 = return ()
On Thu, Jan 20, 2011 at 7:12 PM, Nubis
Hi guys, I was just investigating an issue in my yesod app that prevented me from running the devel-server. It was a warning about route patterns overlapping
S4M/Server/Controller.hs:33:0: Warning: Pattern match(es) are overlapped In the definition of `parse[awnQ]': parse[awnQ] : "con" : "f" [] = ... parse[awnQ] : "con" : "h" [] = ... parse[awnQ] : "con" : "m" : "list" [] = ... parse[awnQ] : "con" : "m" : "c" [] = ...
The issue seems to come up when part of the route is a single character (in this case, f, h and m) like /con/f/ /con/h/ /con/m/list/
I ended up just changing my routes to be more 'expressive' which is fine by me.
Haven't looked at the source of the issue yet, I can reproduce it on 0.6.2 but haven't tried 0.6.3 so I apologize in advance if it is already fixed :)
Just wanted to get it out here so I don't forget to look into it later (I'm heading home now)
Cheers! ----nubis :)
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