From ee2454dbeb8d41d615726593acd8600c4a3253ae Mon Sep 17 00:00:00 2001
From: Matthijs Kooijman <m.kooijman@student.utwente.nl>
Date: Thu, 19 Feb 2009 14:21:52 +0100
Subject: [PATCH] Allow name hints to be set for a signal.

---
 FlattenTypes.hs | 13 +++++++++++--
 Pretty.hs       |  2 +-
 Translator.hs   |  2 +-
 3 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/FlattenTypes.hs b/FlattenTypes.hs
index 092baff..d007663 100644
--- a/FlattenTypes.hs
+++ b/FlattenTypes.hs
@@ -138,7 +138,8 @@ isInternalSigUse _ = False
 data SignalInfo = SignalInfo {
   sigName :: Maybe String,
   sigUse  :: SigUse,
-  sigTy   :: Type.Type
+  sigTy   :: Type.Type,
+  nameHints :: [String]
 }
 
 -- | A flattened function
@@ -183,10 +184,18 @@ genSignalId :: SigUse -> Type.Type -> FlattenState SignalId
 genSignalId use ty = do
   (defs, sigs, n) <- State.get
   -- Generate a new numbered but unnamed signal
-  let s = (n, SignalInfo Nothing use ty)
+  let s = (n, SignalInfo Nothing use ty [])
   State.put (defs, s:sigs, n+1)
   return n
 
+-- | Add a name hint to the given signal
+addNameHint :: SignalId -> String -> FlattenState ()
+addNameHint id hint = do
+  info <- getSignalInfo id
+  let hints = nameHints info
+  let hints' = (hint:hints)
+  setSignalInfo id (info {nameHints = hints'})
+
 -- | Returns the SignalInfo for the given signal. Errors if the signal is not
 --   known in the session.
 getSignalInfo :: SignalId -> FlattenState SignalInfo
diff --git a/Pretty.hs b/Pretty.hs
index cb1f9fc..433c15a 100644
--- a/Pretty.hs
+++ b/Pretty.hs
@@ -79,7 +79,7 @@ instance Pretty SignalExpr where
     parens $ pPrint a <> text " = " <> pPrint b
 
 instance Pretty SignalInfo where
-  pPrint (SignalInfo name use ty) =
+  pPrint (SignalInfo name use ty hints) =
     text ":" <> (pPrint use) <> (ppname name)
     where
       ppname Nothing = empty
diff --git a/Translator.hs b/Translator.hs
index 1a753c2..26cf79d 100644
--- a/Translator.hs
+++ b/Translator.hs
@@ -221,7 +221,7 @@ nameFlatFunction hsfunc fdata =
     -- Name the signals in all other functions
     Just flatfunc ->
       let s = flat_sigs flatfunc in
-      let s' = map (\(id, (SignalInfo Nothing use ty)) -> (id, SignalInfo (Just $ "sig_" ++ (show id)) use ty)) s in
+      let s' = map (\(id, (SignalInfo Nothing use ty hints)) -> (id, SignalInfo (Just $ "sig_" ++ (show id)) use ty hints)) s in
       let flatfunc' = flatfunc { flat_sigs = s' } in
       setFlatFunc hsfunc flatfunc'
 
-- 
2.30.2