From 6e5d435a99f84ad4f4f7cb4f6a41c28b79c29ab3 Mon Sep 17 00:00:00 2001
From: Mart Lubbers <mart@martlubbers.net>
Date: Tue, 12 Apr 2016 22:21:07 +0200
Subject: [PATCH] betere gamma

---
 sem.icl | 29 ++++++++++++++++++++---------
 1 file changed, 20 insertions(+), 9 deletions(-)

diff --git a/sem.icl b/sem.icl
index 31221ca..4038c0f 100644
--- a/sem.icl
+++ b/sem.icl
@@ -9,9 +9,11 @@ import Control.Applicative
 import Control.Monad
 import Control.Monad.State
 import Control.Monad.Identity
+import Math.Random
 import StdMisc
-from StdFunc import id, const
+from StdFunc import id, const, o
 import StdString
+import StdTuple
 import StdList
 
 from Text import class Text(concat), instance Text String
@@ -19,24 +21,33 @@ from Text import class Text(concat), instance Text String
 import AST
 from parse import :: ParserOutput, :: Error
 
-:: Gamma :== 'Map'.Map String Type
+:: Gamma :== ('Map'.Map String Type, [String])
 :: Env a :== (State Gamma (Either SemError a))
 
 get = state $ \s -> (s,s)
 
+getRandomStream :: Int -> [String]
+getRandomStream i = genIdents $ filter (isAlpha o toChar) (genRandInt i)
+	where
+		genIdents r = let (ic, r) = splitAt 5 r in [toString ic: genIdents r]
+
+freshIdent :: Gamma -> (String, Gamma)
+freshIdent (st, [ident:rest]) = case 'Map'.get ident st of
+	Nothing = (ident, (st, rest))
+	_ = freshIdent (st, rest)
+
 putIdent :: String Type -> Env Void
-putIdent i t = gets ('Map'.get i) >>= \mt -> case mt of
-    Nothing = pure <$> modify ('Map'.put i t)
+putIdent i t = gets (\(st, r)->'Map'.get i st) >>= \mt -> case mt of
+    Nothing = pure <$> modify (\(st, r)->('Map'.put i t st, r))
     Just t2 = unify t t2 >>= \r -> case r of
         Left e  = pure $ Left e
-        Right t3 = pure <$> modify ('Map'.put i t3)
+        Right t3 = pure <$> modify (\(st, r)->('Map'.put i t3 st, r))
 
 instance toString SemError where
 	toString (ParseError p e) = concat [
 		toString p,"SemError: ParseError: ", e]
 	toString (Error e) = "SemError: " +++ e
-	toString (UnifyErrorStub t1 t2) = toString (UnifyError {line=0,col=0} t1
-t2)
+	toString (UnifyErrorStub t1 t2) = toString (UnifyError {line=0,col=0} t1 t2)
 	toString (UnifyError p t1 t2) = concat [
 		toString p,
 		"SemError: Cannot unify types. Expected: ",
@@ -44,7 +55,7 @@ t2)
 
 sem :: AST -> SemOutput
 sem (AST vd fd)
-# (eithervds, gamma) = runState (mapM semVarDecl vd) 'Map'.newMap
+# (eithervds, gamma) = runState (mapM semVarDecl vd) ('Map'.newMap, getRandomStream 0)
 # (eitherfds, gamma) = runState (mapM semFunDecl fd) gamma
 = case splitEithers eithervds of
 	(Left errs) = Left $ errs ++ [x\\(Left x)<-eitherfds]
@@ -82,7 +93,7 @@ typeExpr (Op2Expr p e1 BiTimes e2) = unify IntType e1 >>| unify IntType e2
 typeExpr (Op2Expr p e1 BiDivide e2) = unify IntType e1 >>| unify IntType e2
 typeExpr (Op2Expr p e1 BiMod e2) = unify IntType e1 >>| unify IntType e2
 //bool, char of int
-typeExpr (Op2Expr p e1 BiEquals e2) = 
+typeExpr (Op2Expr p e1 BiEquals e2) = undef
 typeExpr (Op2Expr p e1 BiUnEqual e2) = undef
 //char of int
 typeExpr (Op2Expr p e1 BiLesser e2) = undef
-- 
2.20.1