Not sure what's going on here. Doesn't like line 5, the type statement. And
what's with the semicolons in that line and in function main?
Michael
=
From:
http://www.haskell.org/ghc/docs/6.10.3/html/libraries/mtl/Control-Monad-Reader.html
import Control.Monad.Reader
import qualified
Because Data.Map is imported qualified, any symbols in it (including
Map) needs to be qualified:
type Bindings = Map.Map String Int
A standard idiom is to do import like so:
import qualified Data.Map as Map
import Map (Map)
so that the Map symbol itself does not need qualification.
Eric
On Thu, 30 Dec 2010 08:01:01 -0800 (PST)
michael rice nowg...@yahoo.com wrote:
Not sure what's going on here. Doesn't like line 5, the type
statement. And what's with the semicolons in that line and in
function main?
import Control.Monad.Reader
import qualified Data.Map as Map
import
Thanks, all.
Just tried
type Bindings = Map.Map String Int
and it also seems to work.
Michael
--- On Thu, 12/30/10, Pedro Vasconcelos p...@dcc.fc.up.pt wrote:
From: Pedro Vasconcelos p...@dcc.fc.up.pt
Subject: Re: [Haskell-cafe] Not in scope: type constructor or class `Map'
To: haskell-cafe
