From 45cada8eade7242eb7f29af7b92858e9a1a7f68b Mon Sep 17 00:00:00 2001
From: Charles <sircharlesaze@gmail.com>
Date: Fri, 5 Jun 2020 11:37:58 +0200
Subject: Added print environment command, prompt editing and history with
 haskeline

---
 src/Expr.hs | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

(limited to 'src/Expr.hs')

diff --git a/src/Expr.hs b/src/Expr.hs
index 96c2fe6..852ee47 100644
--- a/src/Expr.hs
+++ b/src/Expr.hs
@@ -1,23 +1,25 @@
 module Expr where
 
+import           Control.Monad
 import           Data.List
-import qualified Data.Map  as M
-import Control.Monad
+import qualified Data.Map      as M
 
 
 data Expr
-    = Rational Float
+    = Rational Float  -- values
     | Imaginary Float
     | Complex Float Float
     | Matrix [[Expr]]
-    | Add Expr Expr
+
+    | Add Expr Expr --- ops
     | Sub Expr Expr
     | Mul Expr Expr
     | Div Expr Expr
     | Mod Expr Expr
     | Exp Expr Expr
     | Dot Expr Expr
-    | Variable String
+
+    | Variable String  -- lables
     | Function String Expr
     deriving (Eq)
 
-- 
cgit