--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tools/pas2c/PascalUnitSyntaxTree.hs	Tue Jan 21 22:38:13 2014 +0100
@@ -0,0 +1,119 @@
+module PascalUnitSyntaxTree where
+
+import Data.Maybe
+import Data.Char
+
+data PascalUnit =
+    Program Identifier Implementation Phrase
+    | Unit Identifier Interface Implementation (Maybe Initialize) (Maybe Finalize)
+    | System [TypeVarDeclaration]
+    | Redo [TypeVarDeclaration]
+    deriving Show
+data Interface = Interface Uses TypesAndVars
+    deriving Show
+data Implementation = Implementation Uses TypesAndVars
+    deriving Show
+data Identifier = Identifier String BaseType
+    deriving Show
+data TypesAndVars = TypesAndVars [TypeVarDeclaration]
+    deriving Show
+data TypeVarDeclaration = TypeDeclaration Identifier TypeDecl
+    | VarDeclaration Bool Bool ([Identifier], TypeDecl) (Maybe InitExpression)
+    | FunctionDeclaration Identifier Bool Bool TypeDecl [TypeVarDeclaration] (Maybe (TypesAndVars, Phrase))
+    | OperatorDeclaration String Identifier Bool TypeDecl [TypeVarDeclaration] (Maybe (TypesAndVars, Phrase))
+    deriving Show
+data TypeDecl = SimpleType Identifier
+    | RangeType Range
+    | Sequence [Identifier]
+    | ArrayDecl (Maybe Range) TypeDecl
+    | RecordType [TypeVarDeclaration] (Maybe [[TypeVarDeclaration]])
+    | PointerTo TypeDecl
+    | String Integer
+    | Set TypeDecl
+    | FunctionType TypeDecl [TypeVarDeclaration]
+    | DeriveType InitExpression
+    | VoidType
+    | VarParamType TypeDecl -- this is a hack
+    deriving Show
+data Range = Range Identifier
+           | RangeFromTo InitExpression InitExpression
+           | RangeInfinite
+    deriving Show
+data Initialize = Initialize String
+    deriving Show
+data Finalize = Finalize String
+    deriving Show
+data Uses = Uses [Identifier]
+    deriving Show
+data Phrase = ProcCall Reference [Expression]
+        | IfThenElse Expression Phrase (Maybe Phrase)
+        | WhileCycle Expression Phrase
+        | RepeatCycle Expression [Phrase]
+        | ForCycle Identifier Expression Expression Phrase Bool -- The last Boolean indicates wether it's up or down counting
+        | WithBlock Reference Phrase
+        | Phrases [Phrase]
+        | SwitchCase Expression [([InitExpression], Phrase)] (Maybe [Phrase])
+        | Assignment Reference Expression
+        | BuiltInFunctionCall [Expression] Reference
+        | NOP
+    deriving Show
+data Expression = Expression String
+    | BuiltInFunCall [Expression] Reference
+    | PrefixOp String Expression
+    | PostfixOp String Expression
+    | BinOp String Expression Expression
+    | StringLiteral String
+    | PCharLiteral String
+    | CharCode String
+    | HexCharCode String
+    | NumberLiteral String
+    | FloatLiteral String
+    | HexNumber String
+    | Reference Reference
+    | SetExpression [Identifier]
+    | Null
+    deriving Show
+data Reference = ArrayElement [Expression] Reference
+    | FunCall [Expression] Reference
+    | TypeCast Identifier Expression
+    | SimpleReference Identifier
+    | Dereference Reference
+    | RecordField Reference Reference
+    | Address Reference
+    | RefExpression Expression
+    deriving Show
+data InitExpression = InitBinOp String InitExpression InitExpression
+    | InitPrefixOp String InitExpression
+    | InitReference Identifier
+    | InitArray [InitExpression]
+    | InitRecord [(Identifier, InitExpression)]
+    | InitFloat String
+    | InitNumber String
+    | InitHexNumber String
+    | InitString String
+    | InitChar String
+    | BuiltInFunction String [InitExpression]
+    | InitSet [InitExpression]
+    | InitAddress InitExpression
+    | InitNull
+    | InitRange Range
+    | InitTypeCast Identifier InitExpression
+    deriving Show
+
+data BaseType = BTUnknown
+    | BTChar
+    | BTString
+    | BTInt Bool -- second param indicates whether signed or not
+    | BTBool
+    | BTFloat
+    | BTRecord String [(String, BaseType)]
+    | BTArray Range BaseType BaseType
+    | BTFunction Bool [(Bool, BaseType)] BaseType -- (Bool, BaseType), Bool indiciates whether var or not
+    | BTPointerTo BaseType
+    | BTUnresolved String
+    | BTSet BaseType
+    | BTEnum [String]
+    | BTVoid
+    | BTUnit
+    | BTVarParam BaseType
+    deriving Show