Add printc and exit builtin functions

lib/Language/Elna/Frontend/AST.hs

@@ -12,10 +12,12 @@ module Language.Elna.Frontend.AST
     , Literal(..)
     ) where
 
+import Data.Char (chr)
 import Data.Int (Int32)
 import Data.List (intercalate)
-import Data.Word ({-Word16, -}Word32)
+import Data.Word (Word8, Word32)
 import Language.Elna.Location (Identifier(..), showArrayType)
+import Numeric (showHex)
 
 newtype Program = Program [Declaration]
     deriving Eq
@@ -67,8 +69,8 @@ data Statement
     = EmptyStatement
     {-| AssignmentStatement VariableAccess Expression
     | IfStatement Condition Statement (Maybe Statement)
-    | WhileStatement Condition Statement
-    | CompoundStatement [Statement]-}
+    | WhileStatement Condition Statement -}
+    | CompoundStatement [Statement]
     | CallStatement Identifier [Expression]
     deriving Eq
 
@@ -83,9 +85,9 @@ instance Show Statement
         , maybe "" ((<> " else ") . show) else'
         ]
     show (WhileStatement expression statement) =
-        concat ["while (", show expression, ") ", show statement, ";"]
+        concat ["while (", show expression, ") ", show statement, ";"]-}
     show (CompoundStatement statements) =
-        concat ["{\n", unlines (show <$> statements), " }"]-}
+        concat ["{\n", unlines (show <$> statements), " }"]
     show (CallStatement name parameters) = show name <> "("
         <> intercalate ", " (show <$> parameters) <> ")"
 
@@ -93,22 +95,18 @@ data VariableDeclaration =
     VariableDeclaration Identifier TypeExpression
     deriving Eq
 
-newtype Literal
+data Literal
     = IntegerLiteral Int32
-    {- | HexadecimalLiteral Int32
-    | CharacterLiteral Word16
-    | BooleanLiteral Bool -}
+    | HexadecimalLiteral Int32
+    | CharacterLiteral Word8
     deriving Eq
 
 instance Show Literal
   where
     show (IntegerLiteral integer) = show integer
-    {- show (HexadecimalLiteral integer) = '0' : 'x' : showHex integer ""
+    show (HexadecimalLiteral integer) = '0' : 'x' : showHex integer ""
     show (CharacterLiteral character) =
         '\'' : chr (fromEnum character) : ['\'']
-    show (BooleanLiteral boolean)
-        | boolean = "true"
-        | otherwise = "false" -}
 
 instance Show VariableDeclaration
   where
@@ -120,8 +118,8 @@ data Expression
     | SumExpression Expression Expression
     | SubtractionExpression Expression Expression
     | NegationExpression Expression
-{-    | VariableExpression VariableAccess
     | ProductExpression Expression Expression
+{-    | VariableExpression VariableAccess
     | DivisionExpression Expression Expression -}
     deriving Eq
 
@@ -131,13 +129,10 @@ instance Show Expression
     show (SumExpression lhs rhs) = concat [show lhs, " + ", show rhs]
     show (SubtractionExpression lhs rhs) = concat [show lhs, " - ", show rhs]
     show (NegationExpression negation) = '-' : show negation
-    {- show (VariableExpression variable) = show variable
     show (ProductExpression lhs rhs) = concat [show lhs, " * ", show rhs]
+    {- show (VariableExpression variable) = show variable
     show (DivisionExpression lhs rhs) = concat [show lhs, " / ", show rhs] -}
 {-
-import Data.Char (chr)
-import Numeric (showHex)
-
 data VariableAccess
     = VariableAccess Identifier
     | ArrayAccess VariableAccess Expression