X-Git-Url: https://git.stderr.nl/gitweb?p=matthijs%2Fmaster-project%2Fc%CE%BBash.git;a=blobdiff_plain;f=Sim.hs;h=5a8fe2d56c9b3a808619bf04c86127d6b065f3c8;hp=3be038d3b11d8bfef33de0dde4be1fdc5927aa22;hb=HEAD;hpb=a4852bd912875420e1c99cb135531a7e1df30e16

diff --git a/Sim.hs b/Sim.hs
index 3be038d..5a8fe2d 100644
--- a/Sim.hs
+++ b/Sim.hs
@@ -1,4 +1,4 @@
-module Sim (simulate, Circuit, simulateIO) where
+module Sim (simulate, SCircuit, Circuit, simulateIO, stateless) where
 import Data.Typeable
 
 simulate f input s = do
@@ -12,23 +12,24 @@ simulate f input s = do
     output = run f input s
 
 -- A circuit with input of type a, state of type s and output of type b
-type Circuit i s o = i -> s -> (s, o)
+type SCircuit i s o = i -> s -> (s, o)
+type Circuit i o = i -> o
 
-run :: Circuit i s o -> [i] -> s -> [(i, o, s)]
+run :: SCircuit i s o -> [i] -> s -> [(i, o, s)]
 run f (i:input) s =
   (i, o, s'): (run f input s')
   where
     (s', o) = f i s
 run _ [] _ = []
 
-simulateIO :: (Read i, Show i, Show o, Show s) => Sim.Circuit i s o -> s -> IO()
+simulateIO :: (Read i, Show i, Show o, Show s) => SCircuit i s o -> s -> IO()
 simulateIO c s = do
   putStr "Initial State: "
   putStr $ show s
   putStr "\n\n"
   runIO c s
 
-runIO :: (Read i, Show i, Show o, Show s) => Sim.Circuit i s o -> s -> IO()
+runIO :: (Read i, Show i, Show o, Show s) => SCircuit i s o -> s -> IO()
 runIO f s = do
   putStr "\nInput? "
   line <- getLine
@@ -49,4 +50,10 @@ printOutput (i, o, s) = do
   putStr "\nNew State: "
   putStr $ show s
   putStr "\n\n"
+
+-- Takes a stateless circuit and turns it into a stateful circuit (with an
+-- empty state) so it can be used in simulation
+stateless :: Circuit i o -> SCircuit i () o
+stateless f = \i s -> (s, f i)
+
 -- vim: set ts=8 sw=2 sts=2 expandtab: