Grasp interpreter main program added, still untested

2 files changed, 37 insertions, 2 deletions

diff --git a/makefile b/makefile
index 43c7a44..e9f7a72 100644
--- a/makefile
+++ b/makefile
@@ -6,13 +6,14 @@ EXECUTABLES  =  ${OUTPUTDIR}/test \
                 ${OUTPUTDIR}/fractran \
                 ${OUTPUTDIR}/thue \
                 ${OUTPUTDIR}/unlambda \
-                ${OUTPUTDIR}/brainfuck
+                ${OUTPUTDIR}/brainfuck \
+                ${OUTPUTDIR}/grasp
 
 SWITCHES = -XDeriveDataTypeable
 
 
 
-all: testprog fractranprog thueprog unlambdaprog brainfuckprog
+all: testprog fractranprog thueprog unlambdaprog brainfuckprog graspprog
 
 
 clean:
@@ -43,3 +44,7 @@ unlambdaprog:
 brainfuckprog:
 	cd ${SOURCEDIR}; \
 	ghc ${SWITCHES} --make brainfuck.hs -o ../${OUTPUTDIR}/brainfuck
+
+graspprog:
+	cd ${SOURCEDIR}; \
+	ghc ${SWITCHES} --make grasp.hs -o ../${OUTPUTDIR}/grasp
diff --git a/src/grasp.hs b/src/grasp.hs
new file mode 100644
index 0000000..4b12abd
--- /dev/null
+++ b/src/grasp.hs
@@ -0,0 +1,30 @@
+
+import System.Environment( getArgs )
+import Control.Exception( ErrorCall(..), Handler(..), catches )
+import Grasp.Parser
+import Grasp.Interpreter
+
+
+
+
+usageString :: String
+usageString = "Usage: grasp <program file>"
+
+
+
+program :: IO ()
+program = do
+    args <- getArgs
+    fileContents <- if (length args /= 1)
+                    then error usageString
+                    else readFile (head args)
+    
+    case (parseGrasp fileContents) of
+        Left x -> putStrLn (show x)
+        Right x -> grasp x >> return ()
+
+
+
+main = catches program
+               [ Handler ((\e -> putStrLn . show $ e) :: ErrorCall -> IO ()) ]
+