X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=docs%2Fusers_guide%2Fghci.xml;h=528a6522894263ca5089928396e85ee46415b70b;hb=5e04ae341a945ef430e9d941b34722b8de1f6aae;hp=bac55ed4312bdc72b594bf507d34779af4ad5e79;hpb=6a65049a2b80e42ec44ebd775be98a70101ac495;p=ghc-hetmet.git
diff --git a/docs/users_guide/ghci.xml b/docs/users_guide/ghci.xml
index bac55ed..528a652 100644
--- a/docs/users_guide/ghci.xml
+++ b/docs/users_guide/ghci.xml
@@ -1437,7 +1437,7 @@ as = 'b' : 'c' : (_t1::[Char])
import Prelude hiding (map)
-map :: (a->b) -> a -> b
+map :: (a->b) -> [a] -> [b]
map f [] = []
map f (x:xs) = f x : map f xs
@@ -1740,6 +1740,32 @@ $ ghci -lm
The !-form also annotates the listing
with comments giving possible imports for each group of
entries.
+
+Prelude> :browse! Data.Maybe
+-- not currently imported
+Data.Maybe.catMaybes :: [Maybe a] -> [a]
+Data.Maybe.fromJust :: Maybe a -> a
+Data.Maybe.fromMaybe :: a -> Maybe a -> a
+Data.Maybe.isJust :: Maybe a -> Bool
+Data.Maybe.isNothing :: Maybe a -> Bool
+Data.Maybe.listToMaybe :: [a] -> Maybe a
+Data.Maybe.mapMaybe :: (a -> Maybe b) -> [a] -> [b]
+Data.Maybe.maybeToList :: Maybe a -> [a]
+-- imported via Prelude
+Just :: a -> Maybe a
+data Maybe a = Nothing | Just a
+Nothing :: Maybe a
+maybe :: b -> (a -> b) -> Maybe a -> b
+
+
+ This output shows that, in the context of the current session, in the scope
+ of Prelude, the first group of items from
+ Data.Maybe have not been imported (but are available in
+ fully qualified form in the GHCi session - see ), whereas the second group of items have been
+ imported via Prelude and are therefore available either
+ unqualified, or with a Prelude. qualifier.
+
@@ -1965,6 +1991,17 @@ Prelude> :. cmds.ghci
+
+ :
+ :
+
+
+ Repeat the previous command.
+
+
+
+
+
:history [num]
:history