Sintaxis de PascalScript

PascalScript syntax:

Program -> [PROGRAM Ident ';']
           [UsesClause]
           Block '.'
UsesClause -> USES (String/,)... ';'
Block -> [DeclSection]...
         CompoundStmt
DeclSection -> ConstSection
            -> VarSection
            -> ProcedureDeclSection
ConstSection -> CONST (ConstantDecl)...
ConstantDecl -> Ident '=' Expression ';'
VarSection -> VAR (VarList ';')...
VarList -> Ident/','... ':' TypeIdent [InitValue]
TypeIdent -> Ident
          -> Array
Array -> ARRAY '[' ArrayDim/','... ']' OF Ident
ArrayDim -> Expression..Expression
         -> Expression
InitValue -> '=' Expression
Expression -> SimpleExpression [RelOp SimpleExpression]...
SimpleExpression -> ['-'] Term [AddOp Term]...
Term -> Factor [MulOp Factor]...
Factor -> Designator
       -> UnsignedNumber
       -> String
       -> '(' Expression ')'
       -> NOT Factor
       -> '[' SetConstructor ']'
SetConstructor -> SetNode/','...
SetNode -> Expression ['..' Expression]
RelOp -> '>'
      -> '<'
      -> '<='
      -> '>='
      -> '<>'
      -> '='
      -> IN
      -> IS
AddOp -> '+'
      -> '-'

-> OR -> XOR

MulOp -> '*'
      -> '/'
      -> DIV
      -> MOD
      -> AND
      -> SHL
      -> SHR
Designator -> ['@'] Ident ['.' Ident | '[' ExprList ']' | '(' ExprList
')']...
ExprList -> Expression/','...
Statement -> [SimpleStatement | StructStmt]
StmtList -> Statement/';'...
SimpleStatement -> Designator
                -> Designator ':=' Expression
                -> BREAK | CONTINUE | EXIT
StructStmt -> CompoundStmt
           -> ConditionalStmt
           -> LoopStmt
           -> TryStmt
           -> WithStmt
CompoundStmt -> BEGIN StmtList END
ConditionalStmt -> IfStmt
                -> CaseStmt
IfStmt -> IF Expression THEN Statement [ELSE Statement]
CaseStmt -> CASE Expression OF CaseSelector/';'... [ELSE Statement]
[';'] END
CaseSelector -> SetConstructor ':' Statement
LoopStmt -> RepeatStmt
         -> WhileStmt
         -> ForStmt
RepeatStmt -> REPEAT StmtList UNTIL Expression
WhileStmt -> WHILE Expression DO Statement
ForStmt -> FOR Ident ':=' Expression ToDownto Expression DO Statement
ToDownto -> (TO | DOWNTO)
TryStmt -> TRY StmtList (FINALLY | EXCEPT) StmtList END
WithStmt -> WITH (Designator/,..) DO Statement
ProcedureDeclSection -> ProcedureDecl
                     -> FunctionDecl
ProcedureDecl -> ProcedureHeading ';'
                 Block ';'
ProcedureHeading -> PROCEDURE Ident [FormalParameters]
FunctionDecl -> FunctionHeading ';'
                Block ';'
FunctionHeading -> FUNCTION Ident [FormalParameters] ':' Ident
FormalParameters -> '(' FormalParam/';'... ')'
FormalParm -> [VAR | CONST] VarList

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