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

lib/Language/Elna/Frontend/NameAnalysis.hs

@@ -144,11 +144,11 @@ expression globalTable (AST.SubtractionExpression lhs rhs)
     >> expression globalTable rhs
 expression globalTable (AST.NegationExpression negation) =
     expression globalTable negation
-{- expression globalTable (AST.VariableExpression variableExpression) =
-    variableAccess globalTable variableExpression
 expression globalTable (AST.ProductExpression lhs rhs)
     = expression globalTable lhs
     >> expression globalTable rhs
+{- expression globalTable (AST.VariableExpression variableExpression) =
+    variableAccess globalTable variableExpression
 expression globalTable (AST.DivisionExpression lhs rhs)
     = expression globalTable lhs
     >> expression globalTable rhs
@@ -158,6 +158,8 @@ statement _ AST.EmptyStatement = pure ()
 statement globalTable (AST.CallStatement name arguments)
     = checkSymbol globalTable name
     >> traverse_ (expression globalTable) arguments
+statement globalTable (AST.CompoundStatement statements) =
+    traverse_ (statement globalTable) statements
 {- statement globalTable (AST.AssignmentStatement lvalue rvalue)
     = variableAccess globalTable lvalue
     >> expression globalTable rvalue
@@ -168,8 +170,6 @@ statement globalTable (AST.IfStatement ifCondition ifStatement elseStatement)
 statement globalTable (AST.WhileStatement whileCondition loop)
     = condition globalTable whileCondition
     >> statement globalTable loop
-statement globalTable (AST.CompoundStatement statements) =
-    traverse_ (statement globalTable) statements
 
 variableAccess :: SymbolTable -> AST.VariableAccess -> NameAnalysis ()
 variableAccess globalTable (AST.ArrayAccess arrayExpression indexExpression)

lib/Language/Elna/Frontend/Parser.hs

@@ -34,27 +34,24 @@ import Text.Megaparsec
 import qualified Text.Megaparsec.Char.Lexer as Lexer
 import Text.Megaparsec.Char
     ( alphaNumChar
---    , char
+    , char
     , letterChar
     , space1
---    , string
+    , string
     )
 import Control.Applicative (Alternative(..))
 import Data.Maybe (isJust)
--- import Data.Functor (($>))
 
 type Parser = Parsec Void Text
 
 literalP :: Parser Literal
 literalP
-    = {- HexadecimalLiteral <$> (string "0x" *> lexeme Lexer.hexadecimal)
-    <|> -} IntegerLiteral <$> Lexer.signed space integerP
-    {- <|> CharacterLiteral <$> lexeme charP
-    <|> BooleanLiteral <$> (symbol "true" $> True)
-    <|> BooleanLiteral <$> (symbol "false" $> False)
+    = HexadecimalLiteral <$> (string "0x" *> lexeme Lexer.hexadecimal)
+    <|> IntegerLiteral <$> Lexer.signed space integerP
+    <|> CharacterLiteral <$> lexeme charP
   where
     charP = fromIntegral . fromEnum
-        <$> between (char '\'') (char '\'') Lexer.charLiteral -}
+        <$> between (char '\'') (char '\'') Lexer.charLiteral
 {-
 typeDefinitionP :: Parser Declaration
 typeDefinitionP = TypeDefinition
@@ -73,7 +70,7 @@ termP = choice
 operatorTable :: [[Operator Parser Expression]]
 operatorTable =
     [ unaryOperator
-    -- , factorOperator
+    , factorOperator
     , termOperator
     ]
   where
@@ -81,10 +78,10 @@ operatorTable =
         [ prefix "-" NegationExpression
         , prefix "+" id
         ]
-    {- factorOperator =
+    factorOperator =
         [ binary "*" ProductExpression
-        , binary "/" DivisionExpression
-        ] -}
+        -- , binary "/" DivisionExpression
+        ]
     termOperator =
         [ binary "+" SumExpression
         , binary "-" SubtractionExpression

lib/Language/Elna/Frontend/SymbolTable.hs

@@ -40,9 +40,22 @@ scope parent (SymbolTable _ mappings) = SymbolTable (Just parent) mappings
 
 builtInSymbolTable :: SymbolTable
 builtInSymbolTable = SymbolTable Nothing $ HashMap.fromList
-    [ ("printi", ProcedureInfo empty Vector.empty)
+    [ ("printi", ProcedureInfo empty (Vector.singleton printiX))
+    , ("printc", ProcedureInfo empty (Vector.singleton printcI))
+    , ("exit", ProcedureInfo empty Vector.empty)
     , ("int", TypeInfo intType)
     ]
+  where
+    printiX = ParameterInfo
+        { name = "x"
+        , type' = intType
+        , isReferenceParameter = False
+        }
+    printcI = ParameterInfo
+        { name = "i"
+        , type' = intType
+        , isReferenceParameter = False
+        }
 
 toMap :: SymbolTable  -> HashMap Identifier Info
 toMap (SymbolTable _ map') = map'