Language reference

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

C++Script syntax:

Program -> [UsesClause]

          [DeclSection]...

          CompoundStmt

UsesClause -> '#' INCLUDE (String/,)...

DeclSection -> ConstSection

           -> ProcedureDeclSection

           -> VarStmt ';'

ConstSection -> '#' DEFINE ConstantDecl

ConstantDecl -> Ident Expression

VarStmt -> Ident Ident [Array] [InitValue] /','...

ArrayDef -> '[' ArrayDim/','... ']'

ArrayDim -> Expression

InitValue -> '=' Expression

Expression -> SimpleExpression [RelOp SimpleExpression]...

SimpleExpression -> ['-'] Term [AddOp Term]...

Term -> Factor [MulOp Factor]...

Factor -> Designator

      -> UnsignedNumber                

      -> String

      -> '(' Expression ')'            

      -> '!' Factor

      -> '[' SetConstructor ']'        

      -> NewOperator

SetConstructor -> SetNode/','...

SetNode -> Expression ['..' Expression]

NewOperator -> NEW Designator

RelOp -> '>'  

     -> '<'

     -> '<='

     -> '>='

     -> '!='

     -> '=='

     -> IN  

     -> IS

AddOp -> '+'

     -> '-'

     -> '||'

     -> '^'

MulOp -> '*'  

     -> '/'

     -> '%'

     -> '&&'

     -> '<<'  

     -> '>>'

Designator -> ['&'] Ident ['.' Ident | '[' ExprList ']' | '(' ExprList ')']...

ExprList -> Expression/','...

Statement -> [SimpleStatement ';' | StructStmt | EmptyStmt]

EmptyStmt -> ';'

StmtList -> (Statement...)

SimpleStatement -> DeleteStmt

               -> AssignStmt

               -> VarStmt                  

               -> CallStmt                  

               -> ReturnStmt

               -> (BREAK | CONTINUE | EXIT)  

DeleteStmt -> DELETE Designator

AssignStmt -> Designator ['+'|'-'|'*'|'/']'=' Expression

CallStmt -> Designator ['+''+'|'-''-']

ReturnStmt -> RETURN [Expression]

StructStmt -> CompoundStmt      

          -> ConditionalStmt

          -> LoopStmt          

          -> TryStmt

CompoundStmt -> '{' [StmtList] '}'

ConditionalStmt -> IfStmt

               -> CaseStmt  

IfStmt -> IF '(' Expression ')' Statement [ELSE Statement]

CaseStmt -> SWITCH '(' Expression ')' '{' (CaseSelector)... [DEFAULT ':' Statement] '}'

CaseSelector -> CASE SetConstructor ':' Statement

LoopStmt -> RepeatStmt

        -> WhileStmt

        -> ForStmt    

RepeatStmt -> DO Statement [';'] WHILE '(' Expression ')' ';'

WhileStmt -> WHILE '(' Expression ')' Statement

ForStmt -> FOR '(' ForStmtItem ';' Expression ';' ForStmtItem ')' Statement

ForStmtItem -> AssignStmt

           -> VarStmt

           -> CallStmt

           -> Empty      

TryStmt -> TRY CompoundStmt (FINALLY | EXCEPT) CompoundStmt

FunctionDecl -> FunctionHeading CompoundStmt

FunctionHeading -> Ident Ident [FormalParameters]

FormalParameters -> '(' [FormalParam/';'...] ')'

FormalParam -> TypeIdent (['&'] Ident [InitValue]/',')...

JScript syntax:

Program -> Statements

Statements -> Statement...

Block -> '{' Statements '}'

ImportStmt -> IMPORT (String/,)...

VarStmt -> VAR (VarDecl/',')...

VarDecl -> Ident [Array] [InitValue]

Array -> '[' (ArrayDim/',')... ']'

ArrayDim -> Expression

InitValue -> '=' Expression

Expression -> SimpleExpression [RelOp SimpleExpression]...

SimpleExpression -> ['-'] Term [AddOp Term]...

Term -> Factor [MulOp Factor]...

Factor -> Designator

      -> UnsignedNumber

      -> String

      -> '(' Expression ')'

      -> '!' Factor

      -> '[' SetConstructor ']'

      -> NewOperator

      -> '<' FRString '>'

SetConstructor -> SetNode/','...

SetNode -> Expression ['..' Expression]

NewOperator -> NEW Designator

RelOp -> '>'

     -> '<'

     -> '<='

     -> '>='

     -> '!='

     -> '=='

     -> IN

     -> IS

AddOp -> '+'

     -> '-'

     -> '||'

     -> '^'

MulOp -> '*'

     -> '/'

     -> '%'

     -> '&&'

     -> '<<'

     -> '>>'

Designator -> ['&'] Ident ['.' Ident | '[' ExprList ']' | '(' [ExprList] ')']...

ExprList -> Expression/','...

Statement -> (AssignStmt | CallStmt | BreakStmt | ContinueStmt |

             DeleteStmt | DoWhileStmt | ForStmt | FunctionStmt |

             IfStmt | ImportStmt | ReturnStmt | SwitchStmt |

             VarStmt | WhileStmt | WithStmt | Block) [';']

BreakStmt -> BREAK

ContinueStmt -> CONTINUE

DeleteStmt -> DELETE Designator

AssignStmt -> Designator ['+'|'-'|'*'|'/']'=' Expression

CallStmt -> Designator ['+''+'|'-''-']

ReturnStmt -> RETURN [Expression]

IfStmt -> IF '(' Expression ')' Statement [ELSE Statement]

SwitchStmt -> SWITCH '(' Expression ')' '{' (CaseSelector)... [DEFAULT ':' Statement] '}'

CaseSelector -> CASE SetConstructor ':' Statement

DoWhileStmt -> DO Statement [';'] WHILE '(' Expression ')' ';'

WhileStmt -> WHILE '(' Expression ')' Statement

ForStmt -> FOR '(' ForStmtItem ';' Expression ';' ForStmtItem ')' Statement

ForStmtItem -> AssignStmt

           -> CallStmt

           -> VarStmt

           -> Empty

TryStmt -> TRY CompoundStmt (FINALLY | EXCEPT) CompoundStmt

FunctionStmt -> FunctionHeading Block

FunctionHeading -> FUNCTION Ident FormalParameters

FormalParameters -> '(' [FormalParam/','...] ')'

FormalParam -> ['&'] Ident

WithStmt -> WITH '(' Designator ')' Statement

BasicScript syntax:

Program -> Statements            

Statements -> (EOL | StatementList EOL)...  

StatementList -> Statement/':'...  

ImportStmt -> IMPORTS (String/,)...

DimStmt -> DIM (VarDecl/',')...

VarDecl -> Ident [Array] [AsClause] [InitValue]  

AsClause -> AS Ident  

Array -> '[' ArrayDim/','... ']'  

ArrayDim -> Expression  

InitValue -> '=' Expression  

Expression -> SimpleExpression [RelOp SimpleExpression]...

SimpleExpression -> ['-'] Term [AddOp Term]...

Term -> Factor [MulOp Factor]...

Factor -> Designator                    

      -> UnsignedNumber                

      -> String                        

      -> '(' Expression ')'            

      -> NOT Factor                    

      -> NewOperator                    

      -> '<' FRString '>'              

SetConstructor -> SetNode/','...  

SetNode -> Expression ['..' Expression]  

NewOperator -> NEW Designator  

RelOp -> '>'  

     -> '<'  

     -> '<='  

     -> '>='  

     -> '<>'  

     -> '='  

     -> IN    

     -> IS    

AddOp -> '+'  

     -> '-'  

     -> '&'  

     -> OR  

     -> XOR  

MulOp -> '*'    

     -> '/'    

     -> '\'    

     -> MOD    

     -> AND    

Designator -> [ADDRESSOF] Ident ['.' Ident | '[' ExprList ']' | '(' [ExprList] ')']...  

ExprList -> Expression/','...  

Statement -> BreakStmt

         -> CaseStmt

         -> ContinueStmt

         -> DeleteStmt

         -> DimStmt

         -> DoStmt

         -> ExitStmt

         -> ForStmt

         -> FuncStmt

         -> IfStmt

         -> ImportStmt

         -> ProcStmt

         -> ReturnStmt

         -> SetStmt

         -> TryStmt

         -> WhileStmt

         -> WithStmt

         -> AssignStmt

         -> CallStmt  

BreakStmt -> BREAK  

ContinueStmt -> CONTINUE  

ExitStmt -> EXIT  

DeleteStmt -> DELETE Designator  

SetStmt -> SET AssignStmt  

AssignStmt -> Designator ['+'|'-'|'*'|'/']'=' Expression  

CallStmt -> Designator ['+''+'|'-''-']  

ReturnStmt -> RETURN [Expression]  

IfStmt -> IF Expression THEN ThenStmt  

ThenStmt -> EOL [Statements] [ElseIfStmt | ElseStmt] END IF  

        -> StatementList                                    

ElseIfStmt -> ELSEIF Expression THEN

             (EOL [Statements] [ElseIfStmt | ElseStmt] | Statement)  

ElseStmt -> ELSE (EOL [Statements] | Statement)  

CaseStmt -> SELECT CASE Expression EOL

           (CaseSelector...) [CASE ELSE ':' Statements] END SELECT  

CaseSelector -> CASE SetConstructor ':' Statements

DoStmt -> DO [Statements] LOOP (UNTIL | WHILE) Expression  

WhileStmt -> WHILE Expression [Statements] WEND  

ForStmt -> FOR Ident '=' Expression TO Expression [STEP Expression] EOL

          [Statements] NEXT  

TryStmt -> TRY Statements (FINALLY | CATCH) [Statements] END TRY

WithStmt -> WITH Designator EOL Statements END WITH  

ProcStmt -> SUB Ident [FormalParameters] EOL [Statements] END SUB

FuncStmt -> FUNCTION Ident [FormalParameters] [AsClause] EOL

           [Statements] END FUNCTION  

FormalParameters -> '(' (FormalParam/',')... ')'  

FormalParm -> [BYREF | BYVAL] VarList