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D7Grammar.txt
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D7Grammar.txt
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! -----------------------------------------------------------------------
! Delphi 7 Object Pascal Grammar
! -----------------------------------------------------------------------
! (c) Rob F.M. van den Brink - the Netherlands, 2006 - [email protected]
! Version V1.1, Aug 2006
!
! This grammar parses almost everything of the language, except for a few issues
! that are probably beyond the capabilities of Gold parser.
! Known limitations:
! (1) Cannot handle comment directives like {$ifdef Windows} ... {$endif}
! When parts of the source code is uncommented in this way, the grammer will
! still read it, and may fail.
! (2) The parser consumes all assembler statements, but is too tolerant in accepting
! input. Groups of several <AsmItem> does not belong to a single <AsmInstruction>
! because a 'newline' is regarded as whitespace while it should be a terminator here.
! (3) Lexemes like 'protected' , 'forward' can be both a keyword as well as an identifier
! in Delphi (even in the same object declaration), and when these lexemes should mean
! an identifier, the current grammar cannot handle it correctly.
! For several of them a workaround was created, but a better solution should be
! developped.
! (4) Strings with characters above #127 cannot be handled by the current Grammar.
! This should be very simple, but if the grammar defines string characters
! as the range {#32 .. #255}, Goldparser also adds {#376} and {#956}.
! This looks like a bug in Gold Parser.
! (5) The inclusion of an adequate number of error productions (SynError) is still
! to be done.
! (6) constructs that are considered (for the timebeing) as too weird, are not
! supported; see below.
! -----------------------------------------------------------------------
! This grammar supports also most of 'weird' constructs that Borland has added
! to Delphi. This refers to the inconsistent syntax for several directives
! like in <CallConvention> and <MethodDirective>. Sometimes these directives have
! to be separated by an ';' sometimes not and somtimes both is alowed.
! An example of a syntax that was considered as too weird to be covered by this
! grammar was found in library routine "IdSSLOpenSSLHeaders.pas" (comes with Delphi)
! VAR
! IdSslCtxSetVerifyDepth : procedure(ctx: PSSL_CTX; depth: Integer); cdecl = nil;
! IdSslCtxGetVerifyDepth : function (ctx: PSSL_CTX):Integer; cdecl = nil;
! In a consistent syntax, cdecl should refer to some variable that is set to "nil', but
! the ';' does not close the <TypeSpec> and the rest is still part of the syntax
!
! -----------------------------------------------------------------------
! Version history
! V1.0 - June 2006, derived from scratch, using Delphi 7.0 help and code files
! V1.1 - Aug 2006, lots of refinements to cover almost evberything of the language
! Consumes assembler code as well.
! -----------------------------------------------------------------------
"Name" = 'ObjectPascal'
"Version" = '1.1, Aug 2006'
"Author" = 'Rob F.M. van den Brink'
"About" = 'Derived from scratch, from Delphi 7.0 help and experiments with code files'
"Start Symbol" = <ObjectPascal>
!------------------------------------------------------------------------------
"Case Sensitive" = False
"Virtual Terminals" = SynError CommentStart2 CommentEnd2
Comment Line = '//'
Comment Start = '{'
Comment End = '}'
CommentStart1 = '(*'
CommentEnd1 = '*)'
{Hex Digit} = {Digit} + [abcdefABCDEF]
{Id Head} = {Letter} + [_]
{Id Tail} = {Id Head} + {Digit}
!{String Ch} = {#32 .. #255} - [''] + {HT} !WHY DOES GOLS ADD character #376 and #956 ??
{String Ch} = {printable} - [''] + {HT}
DecLiteral = {digit}+
HexLiteral = '$'{Hex Digit}+
FloatLiteral = {Digit}+.{Digit}+
RealLiteral = {Digit}+ ('.' {Digit}* | {Digit}*) ('E' '+' | 'E' '-' | 'E') {digit}+
StringLiteral = ( '' {String Ch}* '' | '#' {digit}+ | '#' '$' {hex digit}+ | '''' )+
!StringLiteral = ( ( '' {String Ch}* '' )
! | ( '#' {digit}+ )
! | ( '#' '$' {hex digit}+ )
! | ( '''' )
! )+
id = {Id Head}{Id Tail}*
<LCONST> ::= DecLiteral
<ICONST> ::= DecLiteral
| HexLiteral
<RCONST> ::= FloatLiteral
| RealLiteral
<SCONST> ::= StringLiteral
| '^' id ! handles characters like ^H and ^V
!------------------------------------------------------------------------------
!<UnitId> ::= id
<IdList> ::= <IdList> ',' <RefId>
| <RefId>
<LabelId> ::= id
<TypeId> ::= id
! | id '.' <RefId>
| NAME
<TypeName> ::= <TypeId>
| id '.' <RefId> !!accepts UnitId.Id as well
<TypeList> ::= <TypeName>
| <TypeList> ',' <TypeName>
<RefId> ::= id
| AT | ON | READ | WRITE | READLN | WRITELN | NAME | INDEX
| VIRTUAL | ABSOLUTE | MESSAGE | DEFAULT | OVERRIDE | ABSTRACT
| DISPID | REINTRODUCE
| REGISTER | PASCAL | CDECL | STDCALL | SAFECALL
| STRING | WIDESTRING | ANSISTRING
| VARIANT | OLEVARIANT
| READONLY | IMPLEMENTS | NODEFAULT | STORED
| OVERLOAD | LOCAL | VARARGS
| FORWARD
| CONTAINS | PACKAGE | REQUIRES | LIBRARY
| IMPORT | EXPORT
| PLATFORM | DEPRECATED
| EXTERNAL
! PROTECTED | PUBLISHED | PRIVATE | PUBLIC !THIS FAILS IN FIELDS
<FieldDesignator> ::= <RefId>
| <FieldDesignator> '.' <RefId>
!* predefined identifiers are no part of a syntax
<RealTypeId> ::= REAL48
| REAL
| SINGLE
| DOUBLE
| EXTENDED
| CURRENCY
| COMP
<OrdTypeId> ::= SHORTINT
| SMALLINT
| INTEGER
| BYTE
| LONGINT
| INT64
| WORD
| BOOLEAN
| CHAR
| WIDECHAR
| LONGWORD
| PCHAR
*!
!------------------------------------------------------------------------------
! M O D U L E S
!------------------------------------------------------------------------------
<ObjectPascal> ::= <Program> | <Unit> | <Package> | <Library>
<Program> ::= <ProgHeader> <OptUsesSection> <Block> '.'
<ProgHeader> ::= PROGRAM <RefId> <OptProgParamList> ';'
<OptProgParamList> ::= '(' <IdList> ')'
|
<Unit> ::= <UnitHeader> <InterfaceSection> <ImplementationSection> <InitSection> '.'
<UnitHeader> ::= UNIT <RefId> <OptPortDirectives> ';'
<Package> ::= <PackageHeader> <OptRequiresClause> <OptContainsClause> END '.'
<PackageHeader> ::= PACKAGE <RefId> ';'
<OptRequiresClause> ::= REQUIRES <IdList> ';'
|
<OptContainsClause> ::= CONTAINS <IdList> ';'
|
<LibraryHeader> ::= LIBRARY <RefId> ';'
<Library> ::= <LibraryHeader> <OptUsesSection> <Block> '.'
<InterfaceSection> ::= INTERFACE <OptUsesSection> <OptExportDeclList>
<OptUsesSection> ::= <UsesSection>
|
<UsesClause> ::= USES <IdList> ';'
| SynError
<UsesSection> ::= <UsesClause>
| <UsesSection> <UsesClause>
<OptExportDeclList> ::= <ExportDeclList>
|
<ExportDeclList> ::= <ExportDeclItem>
| <ExportDeclList> <ExportDeclItem>
<ExportDeclItem> ::= <ConstSection>
| <TypeSection>
| <VarSection>
| <CallSection>
| <CallSection> FORWARD ';'
! The forward directive has no effect in the interface section of a unit,
! but is not forbidden here.
<CallSection> ::= <ProcHeading>
| <FuncHeading>
<ImplementationSection> ::= IMPLEMENTATION <OptUsesSection> <OptDeclSection> <OptExportBlock>
<InitSection> ::= INITIALIZATION <StmtList> END
| INITIALIZATION <StmtList> FINALIZATION <StmtList> END
| <CompoundStmt>
| END
<Block> ::= <OptDeclSection> <OptExportBlock> <CompoundStmt> <OptExportBlock>
<OptExportBlock> ::= <ExportStmt>
| <OptExportBlock> <ExportStmt>
|
<ExportStmt> ::= EXPORTS <ExportList> ';'
<ExportList> ::= <ExportItem>
| <ExportList> ',' <ExportItem>
<ExportItem> ::= id
| id NAME '' <ConstExpr> ''
| Id INDEX '' <ConstExpr> ''
| NAME '' <ConstExpr> ''
| INDEX '' <ConstExpr> ''
!------------------------------------------------------------------------------
! D E C L A R A T I O N S
!------------------------------------------------------------------------------
<OptDeclSection> ::= <DeclSection>
|
<DeclSection> ::= <DeclItem>
| <DeclSection> <DeclItem>
<DeclItem> ::= <LabelSection>
| <ConstSection>
| <TypeSection>
| <VarSection>
| <ProcedureDeclSection>
| SynError
<LabelSection> ::= LABEL <LabelList> ';'
<LabelList> ::= <LabelId>
| <LabelList> ',' <LabelId>
!-----CONSTS-------------------------------------------------------------------
<ConstSection> ::= CONST <ConstantDeclList>
| RESOURCESTRING <ConstantDeclList> !all these constants should be string
<ConstantDeclList> ::= <ConstantDecl>
| <ConstantDeclList> <ConstantDecl>
<ConstantDecl> ::= <RefId> '=' <ConstExpr> <OptPortDirectives> ';'
| <RefId> ':' <Type> '=' <TypedConstant> <OptPortDirectives> ';'
| SynError ';'
<TypedConstant> ::= <ConstExpr>
| <ArrayConstant>
| <RecordConstant>
<ArrayConstant> ::= '(' <TypedConstList> ')'
<RecordConstant> ::= '(' <RecordFieldConstList> ')'
| '(' <RecordFieldConstList> ';' ')'
| '(' ')' !only to initialize globar vars"
<RecordFieldConstList> ::= <RecordFieldConstant>
| <RecordFieldConstList> ';' <RecordFieldConstant>
<RecordFieldConstant> ::= <RefId> ':' <TypedConstant>
<TypedConstList> ::= <TypedConstant>
| <TypedConstList> ',' <TypedConstant>
!-----TYPES--------------------------------------------------------------------
<TypeSection> ::= TYPE <TypeDeclList>
<TypeDeclList> ::= <TypeDecl>
| <TypeDeclList> <TypeDecl>
<TypeDecl> ::= <TypeId> '=' <TypeSpec>
| SynError ';'
<TypeSpec> ::= <GenericType> ';'
| <RestrictedType> <OptPortDirectives> ';'
| <CallType> ';'
| <CallType> ';' <CallConventions> ';'
| SynError ';'
<Type> ::= <GenericType>
| <CallType>
<TypeRef> ::= <TypeName>
| <StringType>
| <VariantType>
<GenericType> ::= <TypeName>
| <StringType>
| <VariantType>
| <SubrangeType>
| <EnumType>
| <StructType>
| <PointerType>
| <ClassRefType>
| <ClonedType>
<ClonedType> ::= TYPE <TypeRef>
<StringType> ::= STRING
| ANSISTRING
| WIDESTRING
| STRING '[' <ConstExpr> ']'
<VariantType> ::= VARIANT
| OLEVARIANT
<OrdinalType> ::= <SubrangeType> | <EnumType> | <TypeName>
<SubrangeType> ::= <ConstOrdExpr> '..' <ConstOrdExpr>
| <ConstOrdExpr> SynError
| '(' <RefId> ')' '..' <ConstOrdExpr>
<EnumType> ::= '(' <EnumList> ')'
| '(' <RefId> ')'
<EnumList> ::= <EnumId>
| <EnumList> ',' <EnumId>
<EnumId> ::= <RefId>
| <RefId> '=' <ConstExpr>
<OptPacked> ::= PACKED
|
<StructType> ::= <ArrayType>
| <SetType>
| <FileType>
| <RecType>
<ArrayType> ::= <OptPacked> ARRAY '[' <OrdinalTypeList> ']' OF <Type>
| <OptPacked> ARRAY OF CONST
| <OptPacked> ARRAY OF <Type> !dynamic array, starting from 0
! FCells: array of array of TIWGridCell;
<OrdinalTypeList> ::= <OrdinalType>
| <OrdinalTypeList> ',' <OrdinalType>
<RecType> ::= <OptPacked> RECORD <RecFieldList> END <OptPortDirectives>
<RecFieldList> ::=
| <RecField1>
| <RecField2>
| <RecField1> ';' <RecFieldList>
| <RecField2> ';' <RecFieldList>
| <RecField2> ';' <CallConvention>
| <RecField2> ';' <CallConvention> ';' <RecFieldList>
| CASE <Selector> OF <RecVariantList>
<RecVariantList> ::=
| <RecVariant>
| <RecVariant> ';' <RecVariantList>
<RecField1> ::= <IdList> ':' <GenericType> <OptPortDirectives>
<RecField2> ::= <IdList> ':' <CallType>
<RecVariant> ::= <ConstExprList> ':' '(' <RecFieldList> ')'
<Selector> ::= <RefId> ':' <TypeName>
| <TypeName>
<SetType> ::= <OptPacked> SET OF <OrdinalType>
<FileType> ::= <OptPacked> FILE OF <TypeRef>
| FILE
<PointerType> ::= '^' <TypeRef>
<CallType> ::= PROCEDURE <OptFormalParms> <OptCallConventions>
| PROCEDURE <OptFormalParms> OF OBJECT <OptCallConventions>
| FUNCTION <OptFormalParms> ':' <ResultType> <OptCallConventions>
| FUNCTION <OptFormalParms> ':' <ResultType> OF OBJECT <OptCallConventions>
!-----CLASSES AND OBJECTS------------------------------------------------------
<RestrictedType> ::= <ObjectType>
| <ClassType>
| <InterfaceType>
<ObjectType> ::= <OptPacked> OBJECT <OptObjectHeritage> <ObjectMemberList> END
<ClassType> ::= CLASS <OptClassHeritage> <ClassMemberList> END
| CLASS <OptClassHeritage>
<ClassRefType> ::= CLASS OF <TypeName>
<InterfaceType> ::= INTERFACE <OptClassHeritage> <OptClassGUID> <OptClassMethodList> END
| DISPINTERFACE <OptClassHeritage> <OptClassGUID> <OptClassMethodList> END
| INTERFACE
| DISPINTERFACE
<OptObjectHeritage> ::= '(' <TypeName> ')'
|
<OptClassHeritage> ::='(' <TypeList> ')'
|
<OptClassGUID> ::= '[' <ConstStrExpr> ']' ! <SCONST> globally unique identifier
|
<ObjectMemberList> ::= <OptFieldList> <OptObjectMethodList>
| <ObjectMemberList> PUBLIC <OptFieldList> <OptObjectMethodList>
| <ObjectMemberList> PRIVATE <OptFieldList> <OptObjectMethodList>
| <ObjectMemberList> PROTECTED <OptFieldList> <OptObjectMethodList>
<ClassMemberList> ::= <OptFieldList> <OptClassMethodList>
| <ClassMemberList> PUBLIC <OptFieldList> <OptClassMethodList>
| <ClassMemberList> PRIVATE <OptFieldList> <OptClassMethodList>
| <ClassMemberList> PROTECTED <OptFieldList> <OptClassMethodList>
| <ClassMemberList> PUBLISHED <OptFieldList> <OptClassMethodList>
<OptFieldList> ::= <FieldList>
|
<OptObjectMethodList> ::= <ObjectMethodList>
|
<OptClassMethodList> ::= <ClassMethodList>
|
<FieldList> ::= <FieldSpec>
| <FieldList> <FieldSpec>
<ObjectMethodList> ::= <ObjectMethodSpec>
| <ObjectMethodList> <ObjectMethodSpec>
<ClassMethodList> ::= <ClassMethodSpec>
| <ClassMethodList> <ClassMethodSpec>
<FieldSpec> ::= <IdList> ':' <Type> <OptPortDirectives> ';'
| SynError ';'
<ObjectMethodSpec> ::= <MethodSpec> <OptMethodDirectives>
| <PropertySpec> <OptPropertyDirectives>
| SynError
<ClassMethodSpec> ::= <MethodSpec> <OptMethodDirectives>
| <ResolutionSpec> <OptMethodDirectives>
| CLASS <ProcSpec> <OptMethodDirectives>
| CLASS <FuncSpec> <OptMethodDirectives>
| <PropertySpec> <OptPropertyDirectives>
| SynError
<MethodSpec> ::= <ConstructorSpec>
| <DestructorSpec>
| <ProcSpec>
| <FuncSpec>
<ConstructorSpec> ::= CONSTRUCTOR <RefId> <OptFormalParms> ';'
<DestructorSpec> ::= DESTRUCTOR <RefId> <OptFormalParms> ';'
<ProcSpec> ::= PROCEDURE <RefId> <OptFormalParms> <OptCallConventions> ';'
<FuncSpec> ::= FUNCTION <RefId> <OptFormalParms> ':' <ResultType> <OptCallConventions> ';'
<ResolutionSpec> ::= PROCEDURE <RefId> '.' <RefId> '=' <RefId> ';'
| FUNCTION <RefId> '.' <RefId> '=' <RefId> ';'
<PropertySpec> ::= PROPERTY <PropertyDecl> <OptPropSpecifiers> ';'
<PropertyDecl> ::= <RefId> ':' <TypeRef>
| <RefId> '[' <IndexList> ']' ':' <TypeRef>
| <RefId>
<IndexList> ::= <IndexDecl>
| <IndexList> ';' <IndexDecl>
<IndexDecl> ::= <IdDecl>
| CONST <IdDecl>
<IdDecl> ::= <IdList> ':' <Type>
<OptPropSpecifiers> ::= <PropertySpecifiers>
|
<PropertySpecifiers> ::= <PropertySpecifier>
| <PropertySpecifiers> <PropertySpecifier>
<PropertySpecifier> ::= INDEX <ConstExpr> !StorageSpecifier
| READ <FieldDesignator>
| WRITE <FieldDesignator>
| STORED <FieldDesignator>
! | STORED <ConstExpr>
| DEFAULT <ConstExpr>
| NODEFAULT
| WRITEONLY
| READONLY
| DISPID <ConstExpr> !Only within InterfaceTypes
| <ImplementsSpecifier>
<ImplementsSpecifier> ::= IMPLEMENTS <TypeRef>
| <ImplementsSpecifier> ',' <TypeRef>
! The implements directive must be the last specifier in the property
! declaration and can list more than one interface, separated by commas
!-----VARS---------------------------------------------------------------------
<VarSection> ::= VAR <VarDeclList>
| THREADVAR <ThreadVarDeclList>
<VarDeclList> ::= <VarDecl>
| <VarDeclList> <VarDecl>
<VarDecl> ::= <IdList> ':' <Type> <OptAbsoluteClause> <OptPortDirectives> ';'
| <IdList> ':' <Type> '=' <TypedConstant> <OptPortDirectives> ';'
| <IdList> ':' <TypeSpec>
| SynError ';'
<ThreadVarDeclList> ::= <ThreadVarDecl>
| <ThreadVarDeclList> <ThreadVarDecl>
<ThreadVarDecl> ::= <IdList> ':' <TypeSpec>
| SynError ';'
<OptAbsoluteClause> ::= ABSOLUTE <RefId>
! | ABSOLUTE <ConstExpr> !on windows only, not on linux
|
!------------------------------------------------------------------------------
! E X P R E S S I O N S
!------------------------------------------------------------------------------
<ConstExpr> ::= <Expr>
<ConstOrdExpr> ::= <AddExpr>
<ConstStrExpr> ::= <AddExpr>
<Expr> ::= <AddExpr>
| <AddExpr> <RelOp> <AddExpr>
| SynError
<AddExpr> ::= <MulExpr>
| <AddExpr> <AddOp> <MulExpr>
<MulExpr> ::= <Factor>
| <MulExpr> <MulOp> <Factor>
<Factor> ::= NIL
| <ICONST>
| <RCONST>
| <SCONST>
| <Designator>
| <SetConstructor>
| '@' <Designator>
| '@' '@' <Designator> !returns memory address of a procedural variable
| '(' <Expr> ')'
| '(' <Expr> ')' '^'
| '+' <Factor>
| '-' <Factor>
| NOT <Factor>
!---PortArray
<Designator> ::= <FieldDesignator>
| <Designator> '.' <FieldDesignator>
| <Designator> '^'
| <Designator> '[' <ExprList> ']'
| <Designator> '(' <ExprList> ')' !FunctionCall or TypeCast
| <Designator> '(' ')' !FunctionCall
| <Designator> AS <TypeRef> !eg "with Source as TListItem do ..."
| '(' <Designator> ')'
| INHERITED <Designator>
<AsnOp> ::= ':='
| '+=' | '-=' | '*=' | '/='
<RelOp> ::= '=' | '>' | '<' | '<=' | '>=' | '<>'
| IN | IS | AS
<AddOp> ::= '+' |'-'
| OR | XOR
<MulOp> ::='*' | '/'
| DIV | MOD | AND | SHL | SHR
<SetConstructor> ::= '[' <SetElementList> ']'
| '[' ']'
<SetElementList> ::= <SetElement>
| <SetElementList> ',' <SetElement>
<SetElement> ::= <Expr>
| <Expr> '..' <Expr>
<ExprList> ::= <Expr>
| <ExprList> ',' <Expr>
<FmtExpr> ::= <Expr>
| <Expr> ':' <Expr>
| <Expr> ':' <Expr> ':' <Expr>
<FmtExprList> ::= <FmtExpr>
| <FmtExprList> ',' <FmtExpr>
<ConstExprList> ::= <ConstExpr>
| <ConstExprList> ',' <ConstExpr>
!------------------------------------------------------------------------------
! S T A T E M E N T S
!------------------------------------------------------------------------------
<StmtList> ::= <Statement>
| <StmtList> ';' <Statement>
<Statement> ::= <Label> <Statement>
| <AssignmentStmt>
| <CallStmt>
| <GotoStatement>
| <CompoundStmt>
| <IfStatement>
| <CaseStatement>
| <ForStatement>
| <WhileStatement>
| <RepeatStatement>
| <WithStatement>
| <TryFinallyStmt>
| <TryExceptStmt>
| <RaiseStmt>
| <AssemblerStmt>
| SynError
|
<Label> ::= <LCONST> ':'
| <LabelId> ':'
<AssignmentStmt> ::= <Designator> <AsnOp> <Expr>
| '@' <RefId> ':=' <Factor>
!EXAMPLE of this '@' <RefId>, that calls the GetProcAddress
!function and points a var StrComp to the result.
! var StrComp: function(Str1, Str2: PChar): Integer;
! ...
! @StrComp := GetProcAddress(KernelHandle, 'lstrcmpi');
<CallStmt> ::= <Designator> !procedure, function, method, typecast
| WRITE '(' <FmtExprList> ')'
| WRITELN '(' <FmtExprList> ')'
! | INHERITED <CallStmt>
| INHERITED
<GotoStatement> ::= GOTO <LCONST>
| GOTO <RefId>
<CompoundStmt> ::= BEGIN <StmtList> END
<IfStatement> ::= IF <Expr> THEN <Statement> ELSE <Statement>
| IF <Expr> THEN <Statement>
| IF SynError THEN <Statement>
<CaseStatement> ::= CASE <Expr> OF <CaseList> <OtherWise> END
<ForStatement> ::= FOR <RefId> ':=' <Expr> <Dir> <Expr> DO <Statement>
<Dir> ::= TO | DOWNTO
<WhileStatement> ::= WHILE <Expr> DO <Statement>
<WithStatement> ::= WITH <DesignatorList> DO <Statement>
<DesignatorList> ::= <Designator>
| <DesignatorList> ',' <Designator>
<RepeatStatement> ::= REPEAT <StmtList> UNTIL <Expr>
<AssemblerStmt> ::= ASM <AsmLanguage> END
<OtherWise> ::= OTHERWISE <StmtList>
| ELSE <StmtList>
|
<CaseList> ::= <CaseSelector>
| <CaseList> ';' <CaseSelector>
| <CaseList> ';'
<CaseSelector> ::= <CaseLabels> ':' <Statement>
<CaseLabels> ::= <CaseLabel>
| <CaseLabels> ',' <CaseLabel>
<CaseLabel> ::= <ConstExpr>
| <ConstExpr> '..' <ConstExpr>
<RaiseStmt> ::= RAISE SynError ![object] [AT address]
| RAISE <OptExceptInstance>
| RAISE <OptExceptInstance> AT <Address>
<TryFinallyStmt> ::= TRY <StmtList> FINALLY <StmtList> END
<TryExceptStmt> ::= TRY <StmtList> EXCEPT <ExceptionBlock> <OptExceptionElse> END
<ExceptionBlock> ::= <ExceptionStmt>
| <ExceptionBlock> ';' <ExceptionStmt>
<ExceptionStmt> ::= ON <Selector> DO <Statement>
! | ELSE <Statement>
| <Statement>
<OptExceptionElse> ::= ELSE <StmtList>
|
<OptExceptInstance> ::= <Designator> !usually a method call (??)
|
<Address> ::= <Designator> !usually a functiion call, returning an adress
<OptSemi> ::= ';'
|
!------------------------------------------------------------------------------
! R O U T I N E S
!------------------------------------------------------------------------------
<ProcedureDeclSection> ::= <ProcedureDecl>
| <FunctionDecl>
| <MethodDecl>
<ProcedureDecl> ::= <ProcHeading> <CallBody> <OptSemi>
<FunctionDecl> ::= <FuncHeading> <CallBody> <OptSemi>
<MethodDecl> ::= <MethHeading> <CallBody> <OptSemi>
<ProcHeading> ::= PROCEDURE <RefId> <OptFormalParms> <OptCallSpecifiers> ';'
| <ProcHeading> <CallDirectives> <OptSemi>
<FuncHeading> ::= FUNCTION <RefId> <OptFormalParms> ':' <ResultType> <OptCallSpecifiers> ';'
| FUNCTION <RefId> ';'
| <FuncHeading> <CallDirectives> <OptSemi>
!
! if the heading is 'incomplete' it was declared before
! and must be followed by a <CallBody> TO BE IMPROVED
<MethHeading> ::= PROCEDURE <RefId> '.' <RefId> <OptFormalParms> <OptCallSpecifiers> ';'
| FUNCTION <RefId> '.' <RefId> <OptFormalParms> ':' <ResultType> <OptCallSpecifiers> ';'
| FUNCTION <RefId> '.' <RefId> ';'
| CONSTRUCTOR <RefId> '.' <RefId> <OptFormalParms> <OptCallSpecifiers> ';'
| DESTRUCTOR <RefId> '.' <RefId> <OptFormalParms> <OptCallSpecifiers> ';'
| CLASS PROCEDURE <RefId> '.' <RefId> <OptFormalParms> <OptCallSpecifiers> ';'
| CLASS FUNCTION <RefId> '.' <RefId> <OptFormalParms> ':' <ResultType> <OptCallSpecifiers> ';'
| <MethHeading> <CallDirectives> ';'
!
! the class methods operates on classes instead of objects
<ResultType> ::= <TypeRef>
<OptFormalParms> ::= '(' <FormalParmList> ')'
| '(' ')'
|
<FormalParmList> ::= <FormalParm>
| <FormalParmList> ';' <FormalParm>
<FormalParm> ::= <Parameter>
| CONST <Parameter>
| VAR <Parameter>
| OUT <Parameter>
<Parameter> ::= <IdList>
| <IdList> ':' <ParmType>
| <IdList> ':' <TypeRef> '=' <ConstExpr>
<ParmType> ::= <TypeRef>
| ARRAY OF <TypeRef>
| ARRAY OF CONST
| FILE
<CallBody> ::= <OptDeclSection> <CompoundStmt>
| <OptDeclSection> <AssemblerStmt>
| <ExternalDeclaration>
| FORWARD
!-----DIRECTIVES---------------------------------------------------------------
! <PortDirectives> are to produce warnings at compile time when source code is compiled
! in the {$HINTS ON} {$WARNINGS ON} state. It can be applied to declarations
!
! <PortDirectives are accepted:
! WITHIN const and var declarations (not after),
! WITHIN unit headers (not after)
! AFTER function/procedure headings (not within) (ONE terminating ';' is optional)
! <PortDirectives are NOT accepted:
! in/after type declarations
!------------------------------------------------------------------------------
<OptPortDirectives> ::= <PortDirectives>
|
<PortDirectives> ::= <PortDirective>
| <PortDirectives> <PortDirective>
<PortDirective> ::= PLATFORM ! to warn that it is specific to a particular operating environment (such as Windows or Linux)
| PLATFORM '=' <ConstExpr>
| DEPRECATED ! to warn it is obsolete or supported only for backward compatibility
| LIBRARY ! to warn dependencies on a particular library or component framework (such as CLX).
!------------------------
<OptMethodDirectives> ::= <MethodDirectives>
| <OptMethodDirectives> <PortDirective> ';'
|
<MethodDirectives> ::= <MethodDirective> ';'
| <MethodDirectives> <MethodDirective> ';'
<MethodDirective> ::= VIRTUAL
| VIRTUAL <ConstExpr>
| DYNAMIC !for classes only
| OVERRIDE
| ABSTRACT
| MESSAGE <ConstExpr>
| OVERLOAD
| REINTRODUCE
| DISPID <ConstExpr> !only within an <InterfaceType>
| <CallConvention>
!TODO NOT ALL THESE METHOD DIRECTIVES CAN BE COMBINED WITH EACH OTHER
!------------------------
<OptPropertyDirectives> ::= <PropertyDirective> ';'
| <OptPropertyDirectives> <PortDirective> ';'
|
<PropertyDirective> ::= DEFAULT
!------------------------
<ExternalDeclaration> ::= EXTERNAL
| EXTERNAL <ConstStrExpr>
| EXTERNAL <ConstStrExpr> NAME <ConstStrExpr>
! | EXTERNAL <SCONST>
! | EXTERNAL <SCONST> NAME <SCONST>
!------------------------
<CallDirectives> ::= <CallDirective>
| <CallDirectives> <CallDirective>
<CallDirective> ::= <CallConvention>
| <CallObsolete>
| <PortDirective>
| VARARGS !works only with external routines and cdecl calling convention.
| LOCAL !prevents exporting in a library
| <SCONST> !for PasPro only
| OVERLOAD
<OptCallSpecifiers> ::= <CallSpecifier>
| <OptCallSpecifiers> <CallSpecifier>
|
<CallSpecifier> ::= <CallConvention>
| <CallObsolete>
<CallConventions> ::= <CallConvention>
| <CallConventions> <CallConvention>
<OptCallConventions> ::= <CallConvention>
| <OptCallConventions> <CallConvention>
|
![ParmOrder] [CleanUp] [RegParms]