started with new typechecker

[cc1516.git] / sem.icl

diff --git a/sem.icl b/sem.icl
index 02d0117..dc774cc 100644 (file)
--- a/sem.icl
+++ b/sem.icl
@@ -1,27 +1,42 @@
 implementation module sem
 
 import qualified Data.Map as Map
+
 from Data.Func import $
+from StdFunc import o
+
 import Data.Either
-import Control.Monad.State
-import StdMisc
+
+import StdString
+import StdList
+import StdEnum
+import RWST
+import GenEq
+
+from Text import class Text(concat), instance Text String
 
 import AST
-from parse import :: ParserOutput
-from yard import :: Error
 
 :: Gamma :== 'Map'.Map String Type
-:: Env a :== State Gamma a
+:: Constraint :== String
+:: Infer a :== RWST [String] [Constraint] Gamma (Either SemError) a
+:: SemError
+       = ParseError Pos String 
+       | UnifyError Pos Type Type 
+    | FieldSelectorError Pos Type FieldSelector 
+       | OperatorError Pos Op2 Type
+    | UndeclaredVariableError Pos String
+    | ArgumentMisMatchError Pos String
+       | Error String
 
-sem :: ParserOutput -> SemOutput
-sem (Left p) = Left p
-sem (Right (AST vd fd)) = Right $ AST vd fd
-//     foldM semVarDecl vd 
-//     >>= \gamma ->foldM typecheck gamma fd
+variableStream :: [String]
+variableStream = map toString [1..]
 
-semVarDecl :: VarDecl -> Env VarDecl
-semVarDecl (Vardecl pos type ident expr) = undef
-       
+sem :: AST -> SemOutput
+sem (AST vd fd) = Right $ (AST vd fd, 'Map'.newMap)
 
+instance toString Gamma where
+       toString mp = concat [concat [k, ": ", toString v, "\n"]\\(k, v)<-'Map'.toList mp]
 
-        
+instance toString SemError where
+       toString se = "SemError: "