Implement if statements with equality

lib/Language/Elna/Frontend/AST.hs

@@ -6,8 +6,8 @@ module Language.Elna.Frontend.AST
     , Statement(..)
     , TypeExpression(..)
     , VariableDeclaration(..)
-    {-, VariableAccess(..)
-    , Condition(..)-}
+    --, VariableAccess(..)
+    , Condition(..)
     , Expression(..)
     , Literal(..)
     ) where
@@ -67,8 +67,8 @@ instance Show TypeExpression
 
 data Statement
     = EmptyStatement
-    {-| AssignmentStatement VariableAccess Expression
     | IfStatement Condition Statement (Maybe Statement)
+    {-| AssignmentStatement VariableAccess Expression
     | WhileStatement Condition Statement -}
     | CompoundStatement [Statement]
     | CallStatement Identifier [Expression]
@@ -77,13 +77,13 @@ data Statement
 instance Show Statement
   where
     show EmptyStatement = ";"
-    {-show (AssignmentStatement lhs rhs) =
-        concat [show lhs, " := ", show rhs, ";"]
     show (IfStatement condition if' else') = concat
         [ "if (", show condition, ") "
         , show if'
         , maybe "" ((<> " else ") . show) else'
         ]
+    {-show (AssignmentStatement lhs rhs) =
+        concat [show lhs, " := ", show rhs, ";"]
     show (WhileStatement expression statement) =
         concat ["while (", show expression, ") ", show statement, ";"]-}
     show (CompoundStatement statements) =
@@ -143,22 +143,21 @@ instance Show VariableAccess
     show (VariableAccess variableName) = show variableName
     show (ArrayAccess arrayAccess elementIndex) =
         concat [show arrayAccess, "[", show elementIndex, "]"]
-
+-}
 data Condition
     = EqualCondition Expression Expression
-    | NonEqualCondition Expression Expression
-    | LessCondition Expression Expression
-    | GreaterCondition Expression Expression
-    | LessOrEqualCondition Expression Expression
-    | GreaterOrEqualCondition Expression Expression
+    -- | NonEqualCondition Expression Expression
+    -- | LessCondition Expression Expression
+    -- | GreaterCondition Expression Expression
+    -- | LessOrEqualCondition Expression Expression
+    -- | GreaterOrEqualCondition Expression Expression
     deriving Eq
 
 instance Show Condition
   where
     show (EqualCondition lhs rhs) = concat [show lhs, " = ", show rhs]
-    show (NonEqualCondition lhs rhs) = concat [show lhs, " # ", show rhs]
-    show (LessCondition lhs rhs) = concat [show lhs, " < ", show rhs]
-    show (GreaterCondition lhs rhs) = concat [show lhs, " > ", show rhs]
-    show (LessOrEqualCondition lhs rhs) = concat [show lhs, " <= ", show rhs]
-    show (GreaterOrEqualCondition lhs rhs) = concat [show lhs, " >= ", show rhs]
--}
+    -- show (NonEqualCondition lhs rhs) = concat [show lhs, " # ", show rhs]
+    -- show (LessCondition lhs rhs) = concat [show lhs, " < ", show rhs]
+    -- show (GreaterCondition lhs rhs) = concat [show lhs, " > ", show rhs]
+    -- show (LessOrEqualCondition lhs rhs) = concat [show lhs, " <= ", show rhs]
+    -- show (GreaterOrEqualCondition lhs rhs) = concat [show lhs, " >= ", show rhs]