From 65c8beecb14f6d09c49504d74beedd58cc7ddd17 Mon Sep 17 00:00:00 2001
From: "Juan J. Martinez" <jjm@usebox.net>
Date: Wed, 7 Sep 2022 16:26:50 +0100
Subject: Better project layout, removed warnings

---
 src/Env.hs | 62 --------------------------------------------------------------
 1 file changed, 62 deletions(-)
 delete mode 100644 src/Env.hs

(limited to 'src/Env.hs')

diff --git a/src/Env.hs b/src/Env.hs
deleted file mode 100644
index 5433de0..0000000
--- a/src/Env.hs
+++ /dev/null
@@ -1,62 +0,0 @@
-module Env where
-
-import qualified Ast as A
-import qualified Data.Map as Map
-import Data.Maybe (isJust)
-import Error
-import Text.Parsec (SourcePos)
-
-type Sym = (A.Ident, A.Type, Bool, SourcePos)
-
-type SymMap = Map.Map A.Ident Sym
-
-data Env = Env SymMap (Maybe Env) deriving (Show)
-
-emptyEnv = Env Map.empty Nothing
-
--- | @getSymB local env ident@ checks @local@ parameter to tell if we look on
--- the local environment or if we should check also in the parent(s).
-getSymB :: Bool -> Env -> A.Ident -> Maybe Sym
-getSymB local (Env m parent) id =
-  case (local, Map.lookup id m) of
-    (False, Nothing) -> do
-      p <- parent
-      getSym p id
-    (_, s) -> s
-
--- | Gets a symbol checking all the environments.
-getSym :: Env -> A.Ident -> Maybe Sym
-getSym = getSymB False
-
--- | Gets a symbol checking the local environment.
-getSyml :: Env -> A.Ident -> Maybe Sym
-getSyml = getSymB True
-
--- | Checks if a symbol exists.
-existsSym :: Env -> A.Ident -> Bool
-existsSym env sym = isJust $ getSym env sym
-
--- | Checks if a local symbol exists in the local environment.
-existsSyml :: Env -> A.Ident -> Bool
-existsSyml env sym = isJust $ getSyml env sym
-
--- | @addSym e s@ add symbol @s@ to enviroment @e@ and returns the modified
--- environment. It will create a new enviroment if the symbol already exists
--- (shadowing).
-addSym :: Env -> Sym -> Env
-addSym env@(Env m parent) sym@(id, _, _, _) = case getSym env id of
-  Nothing -> Env (Map.insert id sym m) parent
-  Just s -> Env (Map.singleton id sym) $ Just env
-
--- | @addEnv e@ adds a new local environment using @e@ as parent.
-addEnv :: Env -> Env
-addEnv env = Env Map.empty $ Just env
-
--- | @addSymUniq e s@ adds a local symbol @s@ to the enviroment @e@ if it
--- doesn't exist.
-addSymUniq :: Env -> Sym -> Either Error Env
-addSymUniq ev (id, typ, priv, pos) = case getSyml ev id of
-  Nothing -> Right $ addSym ev sym
-  Just (_, _, _, p) -> Left $ Error AlreadyDefined ("symbol \"" ++ id ++ "\" already defined in " ++ show p) pos
-  where
-    sym = (id, typ, priv, pos)
-- 
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