Parse int comparisons as boolean expression

README.md

@@ -35,7 +35,7 @@ I recommend using VSCodium, which is preconfigured to have syntax highlighting a
 
 ## File structure
 
-- `app` - contains the compiler program
+- `src` - contains the compiler program
 - `example` - contains example programs that can be compiled
 
 ## Credits

src/Main/Parser/Megaparsec.hs

@@ -54,15 +54,34 @@ intExprTable =
 intExpr :: Parser M.Int
 intExpr = makeExprParser intExprTerm intExprTable
 
--- boolExprTerm :: ParsecT Void Text Data.Functor.Identity.Identity M.Bool
--- boolExprTerm =
---   choice
---     [ M.Bool True <$ string "true",
---       M.Bool False <$ string "false",
---       parens boolExpr
---     ]
+intOrdCmpExpr :: ParsecT Void Text Data.Functor.Identity.Identity (M.OrdCmpOp, M.Int, M.Int)
+intOrdCmpExpr = do
+  b <- intExpr
+  a <-
+    choice
+      [ M.GT <$ symbol ">",
+        M.GTE <$ symbol ">=",
+        -- M.Eq <$ string "==",
+        -- M.Neq <$ string "!=",
+        M.LTE <$ symbol "<=",
+        M.LT <$ symbol "<"
+      ]
+  c <- intExpr
+  return (a, b, c)
 
--- boolExprTable :: [[Operator Parser (Either M.Bool M.Int)]]
+uncurry3 :: (a -> b -> c -> d) -> (a, b, c) -> d
+uncurry3 f (x, y, z) = f x y z
+
+boolExprTerm :: ParsecT Void Text Data.Functor.Identity.Identity M.Bool
+boolExprTerm =
+  choice
+    [ uncurry3 M.IntOrdCmp <$> intOrdCmpExpr,
+      M.Bool True <$ string "true",
+      M.Bool False <$ string "false",
+      parens boolExprTerm
+    ]
+
+-- boolExprTable :: [[Operator Parser M.Bool]]
 -- boolExprTable =
 --   [ [ binaryOp "<" (M.IntOrdCmp M.LT),
 --       binaryOp "<=" (M.IntOrdCmp M.LTE),
@@ -82,8 +101,8 @@ binaryOp name f = InfixL $ f <$ symbol name
 statement :: Parser M.Statement
 statement =
   choice
-    [ string "printInt" *> (M.PrintInt <$> parens intExpr)
-    -- ,string "printBool" *> (M.PrintBool <$> parens boolExpr)
+    [ string "printInt" *> (M.PrintInt <$> parens intExpr),
+      string "printBool" *> (M.PrintBool <$> parens boolExprTerm)
     ]
     <* symbol ";"
 

src/Main/Types.hs

@@ -11,24 +11,27 @@ where
 
 import qualified Prelude as P
 
-data ArithOp = Add | Sub | Mul | Div
+data ArithOp = Add | Sub | Mul | Div deriving (P.Show)
 
-data EqOp = Eq | Neq
+data EqOp = Eq | Neq deriving (P.Show)
 
-data OrdCmpOp = GT | GTE | LT | LTE
+data OrdCmpOp = GT | GTE | LT | LTE deriving (P.Show)
 
 -- newtype BinExpr op i o = BinExpr (op -> i -> i -> o)
 
 data Int
   = Int P.Int
   | IntArith ArithOp Int Int -- (BinExpr ArithOp Int Int)
+  deriving (P.Show)
 
 data Bool
   = Bool P.Bool
   | IntEq EqOp Int Int -- (BinExpr EqOp Int Bool)
   | IntOrdCmp OrdCmpOp Int Int -- (BinExpr OrdCmpOp Int Bool)
   | BoolEq EqOp Bool Bool -- (BinExpr EqOp Bool Bool)
+  deriving (P.Show)
 
 data Statement
   = PrintInt Int
-  | PrintBool Bool
+  | PrintBool Bool
+  deriving (P.Show)