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−module PascalUnitSyntaxTree where
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−
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−import Data.Maybe
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−import Data.Char
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−
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−data PascalUnit =
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−    Program Identifier Implementation Phrase
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−    | Unit Identifier Interface Implementation (Maybe Initialize) (Maybe Finalize)
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−    | System [TypeVarDeclaration]
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−    | Redo [TypeVarDeclaration]
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−    deriving Show
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−data Interface = Interface Uses TypesAndVars
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−    deriving Show
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−data Implementation = Implementation Uses TypesAndVars
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−    deriving Show
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−data Identifier = Identifier String BaseType
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−    deriving Show
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−data TypesAndVars = TypesAndVars [TypeVarDeclaration]
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−    deriving Show
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−data TypeVarDeclaration = TypeDeclaration Identifier TypeDecl
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−    | VarDeclaration Bool Bool ([Identifier], TypeDecl) (Maybe InitExpression)
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−    | FunctionDeclaration Identifier Bool TypeDecl [TypeVarDeclaration] (Maybe (TypesAndVars, Phrase))
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−    | OperatorDeclaration String Identifier Bool TypeDecl [TypeVarDeclaration] (Maybe (TypesAndVars, Phrase))
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−    deriving Show
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−data TypeDecl = SimpleType Identifier
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−    | RangeType Range
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−    | Sequence [Identifier]
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−    | ArrayDecl (Maybe Range) TypeDecl
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−    | RecordType [TypeVarDeclaration] (Maybe [[TypeVarDeclaration]])
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−    | PointerTo TypeDecl
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−    | String Integer
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−    | Set TypeDecl
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−    | FunctionType TypeDecl [TypeVarDeclaration]
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−    | DeriveType InitExpression
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−    | VoidType
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−    | VarParamType TypeDecl -- this is a hack
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−    deriving Show
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−data Range = Range Identifier
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−           | RangeFromTo InitExpression InitExpression
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−           | RangeInfinite
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−    deriving Show
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−data Initialize = Initialize String
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−    deriving Show
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−data Finalize = Finalize String
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−    deriving Show
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−data Uses = Uses [Identifier]
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−    deriving Show
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−data Phrase = ProcCall Reference [Expression]
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−        | IfThenElse Expression Phrase (Maybe Phrase)
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−        | WhileCycle Expression Phrase
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−        | RepeatCycle Expression [Phrase]
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−        | ForCycle Identifier Expression Expression Phrase Bool -- The last Boolean indicates wether it's up or down counting
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−        | WithBlock Reference Phrase
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−        | Phrases [Phrase]
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−        | SwitchCase Expression [([InitExpression], Phrase)] (Maybe [Phrase])
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−        | Assignment Reference Expression
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−        | BuiltInFunctionCall [Expression] Reference
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−        | NOP
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−    deriving Show
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−data Expression = Expression String
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−    | BuiltInFunCall [Expression] Reference
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−    | PrefixOp String Expression
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−    | PostfixOp String Expression
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−    | BinOp String Expression Expression
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−    | StringLiteral String
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−    | PCharLiteral String
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−    | CharCode String
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−    | HexCharCode String
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−    | NumberLiteral String
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−    | FloatLiteral String
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−    | HexNumber String
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−    | Reference Reference
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−    | SetExpression [Identifier]
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−    | Null
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−    deriving Show
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−data Reference = ArrayElement [Expression] Reference
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−    | FunCall [Expression] Reference
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−    | TypeCast Identifier Expression
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−    | SimpleReference Identifier
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−    | Dereference Reference
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−    | RecordField Reference Reference
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−    | Address Reference
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−    | RefExpression Expression
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−    deriving Show
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−data InitExpression = InitBinOp String InitExpression InitExpression
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−    | InitPrefixOp String InitExpression
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−    | InitReference Identifier
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−    | InitArray [InitExpression]
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−    | InitRecord [(Identifier, InitExpression)]
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−    | InitFloat String
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−    | InitNumber String
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−    | InitHexNumber String
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−    | InitString String
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−    | InitChar String
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−    | BuiltInFunction String [InitExpression]
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−    | InitSet [InitExpression]
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−    | InitAddress InitExpression
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−    | InitNull
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−    | InitRange Range
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−    | InitTypeCast Identifier InitExpression
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−    deriving Show
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−
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−data BaseType = BTUnknown
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−    | BTChar
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−    | BTString
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−    | BTInt
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−    | BTBool
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−    | BTFloat
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−    | BTRecord String [(String, BaseType)]
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−    | BTArray Range BaseType BaseType
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−    | BTFunction Bool Int BaseType
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−    | BTPointerTo BaseType
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−    | BTUnresolved String
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−    | BTSet BaseType
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−    | BTEnum [String]
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−    | BTVoid
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−    | BTUnit
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−    | BTVarParam BaseType
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−    deriving Show