Add a getSignalInfo accessor.

[matthijs/master-project/cλash.git] / FlattenTypes.hs

diff --git a/FlattenTypes.hs b/FlattenTypes.hs
index af6289e6588371855c1dc0ef6ef8be838c73fc5a..c7db378ef27279f1ef7519f458df5de78426f0e8 100644 (file)
--- a/FlattenTypes.hs
+++ b/FlattenTypes.hs
@@ -20,7 +20,7 @@ type SignalMap = HsValueMap SignalId
 type StateId = Int
 
 -- | How is a given (single) value in a function's type (ie, argument or
--- return value) used?
+--   return value) used?
 data HsValueUse = 
   Port           -- ^ Use it as a port (input or output)
   | State StateId -- ^ Use it as state (input or output). The int is used to
@@ -176,3 +176,10 @@ genSignalId use ty = do
   let s = (n, SignalInfo Nothing use ty)
   State.put (defs, s:sigs, n+1)
   return n
+
+-- | Returns the SignalInfo for the given signal. Errors if the signal is not
+--   known in the session.
+getSignalInfo :: SignalId -> FlattenState SignalInfo
+getSignalInfo id = do
+  (defs, sigs, n) <- State.get
+  return $ signalInfo sigs id