[project @ 1999-06-25 16:52:48 by sof]

Document the SocketPrim.PortNumber type

diff --git a/ghc/docs/users_guide/libmisc.vsgml b/ghc/docs/users_guide/libmisc.vsgml
index 87c6430..7a604a3 100644 (file)
--- a/ghc/docs/users_guide/libmisc.vsgml
+++ b/ghc/docs/users_guide/libmisc.vsgml
@@ -837,11 +837,17 @@ recvFrom  :: Hostname -> PortID -> IO String
 socketPort     :: Socket -> IO PortID
 
 data PortID    -- PortID is a non-abstract type
-  = Service String     -- Service Name eg "ftp"
-  | PortNumber Int     -- User defined Port Number
-  | UnixSocket String  -- Unix family socket in file system
+  = Service String       -- Service Name eg "ftp"
+  | PortNumber PortNumber -- User defined Port Number
+  | UnixSocket String    -- Unix family socket in file system
 
 type Hostname = String
+
+ -- 16-bit value (stored in network byte order).
+data PortNumber
+ -- instance of: Eq, Num, Show.
+
+mkPortNumber :: Int -> PortNumber
 </verb></tscreen>
 
 Various examples of networking Haskell code are provided in