-- -- m2.bnf grammar and associated actions for pass 0. -- -- Copyright (C) 2001-2022 Free Software Foundation, Inc. -- Contributed by Gaius Mulley . -- -- This file is part of GNU Modula-2. -- -- GNU Modula-2 is free software; you can redistribute it and/or modify -- it under the terms of the GNU General Public License as published by -- the Free Software Foundation; either version 3, or (at your option) -- any later version. -- -- GNU Modula-2 is distributed in the hope that it will be useful, but -- WITHOUT ANY WARRANTY; without even the implied warranty of -- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -- General Public License for more details. -- -- You should have received a copy of the GNU General Public License -- along with GNU Modula-2; see the file COPYING3. If not see -- . % module P0SyntaxCheck begin (* output from m2.bnf, automatically generated do not edit if these are the top two lines in the file. Copyright (C) 2001-2022 Free Software Foundation, Inc. Contributed by Gaius Mulley . This file is part of GNU Modula-2. GNU Modula-2 is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GNU Modula-2 is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GNU Modula-2; see the file COPYING. If not, see . *) IMPLEMENTATION MODULE P0SyntaxCheck ; FROM M2LexBuf IMPORT currentstring, currenttoken, GetToken, InsertToken, InsertTokenAndRewind, GetTokenNo, DisplayToken, DumpTokens ; FROM M2MetaError IMPORT MetaErrorStringT0 ; FROM M2Quads IMPORT PushT, PushTF, IsAutoPushOn, PushAutoOff, PushAutoOn, PopAuto, DisplayStack, PushTFtok ; FROM M2Reserved IMPORT tokToTok, toktype, NulTok, ImportTok, ExportTok, QualifiedTok, UnQualifiedTok, BuiltinTok, InlineTok ; FROM P2SymBuild IMPORT BuildString, BuildNumber ; FROM NameKey IMPORT Name, NulName, makekey ; FROM StrLib IMPORT StrCopy, StrConCat, StrEqual ; FROM M2Batch IMPORT MakeProgramSource, MakeDefinitionSource, MakeImplementationSource ; FROM DynamicStrings IMPORT String, InitString, KillString, Mark, ConCat, ConCatChar ; FROM M2Debug IMPORT Assert ; FROM M2Printf IMPORT printf0 ; (* imports for Pass0 *) FROM P0SymBuild IMPORT RegisterImports, RegisterInnerImports, RegisterProgramModule, RegisterImplementationModule, RegisterDefinitionModule, RegisterInnerModule, EndModule, RegisterProcedure, EndProcedure ; FROM SymbolTable IMPORT NulSym, PutModuleContainsBuiltin, PutHiddenTypeDeclared ; IMPORT M2Error ; CONST Debugging = FALSE ; DebugRecover = FALSE ; Pass0 = TRUE ; Pass1 = FALSE ; Pass2 = FALSE ; (* permanently disabled for the time being *) Pass3 = FALSE ; (* permanently disabled for the time being *) MaxInsert = 10 ; (* allow 10 tokens to be inserted before *) (* giving up. *) VAR seenError : BOOLEAN ; LastIdent : Name ; InsertCount: CARDINAL ; PROCEDURE ErrorString (s: String) ; BEGIN MetaErrorStringT0 (GetTokenNo (), s) ; seenError := TRUE END ErrorString ; PROCEDURE ErrorArray (a: ARRAY OF CHAR) ; BEGIN ErrorString (InitString (a)) END ErrorArray ; % declaration P0SyntaxCheck begin (* SyntaxError - after a syntax error we skip all tokens up until we reach a stop symbol. *) PROCEDURE SyntaxError (stopset0: SetOfStop0; stopset1: SetOfStop1; stopset2: SetOfStop2) ; BEGIN DescribeError ; IF Debugging THEN printf0('\nskipping token *** ') END ; (* --fixme-- this assumes a 32 bit word size. *) WHILE NOT (((ORD(currenttoken)<32) AND (currenttoken IN stopset0)) OR ((ORD(currenttoken)>=32) AND (ORD(currenttoken)<64) AND (currenttoken IN stopset1)) OR ((ORD(currenttoken)>=64) AND (currenttoken IN stopset2))) DO GetToken END ; IF Debugging THEN printf0(' ***\n') END END SyntaxError ; (* SyntaxCheck - *) PROCEDURE SyntaxCheck (stopset0: SetOfStop0; stopset1: SetOfStop1; stopset2: SetOfStop2) ; BEGIN (* --fixme-- this assumes a 32 bit word size. *) IF NOT (((ORD(currenttoken)<32) AND (currenttoken IN stopset0)) OR ((ORD(currenttoken)>=32) AND (ORD(currenttoken)<64) AND (currenttoken IN stopset1)) OR ((ORD(currenttoken)>=64) AND (currenttoken IN stopset2))) THEN SyntaxError (stopset0, stopset1, stopset2) END END SyntaxCheck ; (* GetMissingTokenMessage - generates and returns a string about a missing token, t. *) PROCEDURE GetMissingTokenMessage (t: toktype) : String ; VAR s0 : SetOfStop0 ; s1 : SetOfStop1 ; s2 : SetOfStop2 ; str: String ; BEGIN s0 := SetOfStop0{} ; s1 := SetOfStop1{} ; s2 := SetOfStop2{} ; IF ORD(t)<32 THEN s0 := SetOfStop0{t} ELSIF ORD(t)<64 THEN s1 := SetOfStop1{t} ELSE s2 := SetOfStop2{t} END ; str := DescribeStop (s0, s1, s2) ; RETURN str END GetMissingTokenMessage ; (* ErrorMissingToken - generates an error message about a missing token, t. *) PROCEDURE ErrorMissingToken (t: toktype) ; VAR str: String ; BEGIN str := GetMissingTokenMessage (t) ; str := ConCat (InitString ('syntax error,'), Mark (str)) ; MetaErrorStringT0 (GetTokenNo (), str) END ErrorMissingToken ; (* WarnMissingToken - generates a warning message about a missing token, t. *) PROCEDURE WarnMissingToken (t: toktype) ; VAR str: String ; BEGIN str := GetMissingTokenMessage (t) ; str := ConCat (InitString ('{%W}syntax warning,'), Mark (str)) ; MetaErrorStringT0 (GetTokenNo (), str) ; IF DebugRecover THEN printf0 ("warning note created\n") END END WarnMissingToken ; (* MissingToken - generates a warning message about a missing token, t. *) PROCEDURE MissingToken (t: toktype) ; BEGIN IF (InsertCount=32) AND (ORD(t)<64) AND (t IN stopset1)) OR ((ORD(t)>=64) AND (t IN stopset2)) THEN INC (InsertCount) ; IF InsertCount < MaxInsert THEN WarnMissingToken (t) ; IF DebugRecover THEN printf0 ('buffer before\n') ; DumpTokens ; printf0 ('inserting token: buffer after\n') ; DumpTokens ; printf0 ('inserting token\n') END ; InsertTokenAndRewind (t) ; RETURN TRUE END END ; RETURN FALSE END CheckInsertCandidate ; (* InStopSet *) PROCEDURE InStopSet (t: toktype; stopset0: SetOfStop0; stopset1: SetOfStop1; stopset2: SetOfStop2) : BOOLEAN ; BEGIN IF ((ORD(t)<32) AND (t IN stopset0)) OR ((ORD(t)>=32) AND (ORD(t)<64) AND (t IN stopset1)) OR ((ORD(t)>=64) AND (t IN stopset2)) THEN RETURN( TRUE ) ELSE RETURN( FALSE ) END END InStopSet ; (* PeepToken - peep token checks to see whether the stopset is satisfied by currenttoken If it is not then it will insert a token providing the token is one of ; ] ) } . OF END , if the stopset contains then we do not insert a token *) PROCEDURE PeepToken (stopset0: SetOfStop0; stopset1: SetOfStop1; stopset2: SetOfStop2) ; BEGIN (* and again (see above re: ORD) *) IF (NOT (((ORD(currenttoken)<32) AND (currenttoken IN stopset0)) OR ((ORD(currenttoken)>=32) AND (ORD(currenttoken)<64) AND (currenttoken IN stopset1)) OR ((ORD(currenttoken)>=64) AND (currenttoken IN stopset2)))) AND (NOT InStopSet(identtok, stopset0, stopset1, stopset2)) THEN (* SyntaxCheck will fail since currentoken is not part of the stopset we check to see whether one of the following is in the stopset and if not emit a warning and also the token. *) IF CheckInsertCandidate (semicolontok, stopset0, stopset1, stopset2) OR CheckInsertCandidate (rsbratok, stopset0, stopset1, stopset2) OR CheckInsertCandidate (rparatok, stopset0, stopset1, stopset2) OR CheckInsertCandidate (rcbratok, stopset0, stopset1, stopset2) OR CheckInsertCandidate (periodtok, stopset0, stopset1, stopset2) OR CheckInsertCandidate (oftok, stopset0, stopset1, stopset2) OR CheckInsertCandidate (endtok, stopset0, stopset1, stopset2) OR CheckInsertCandidate (commatok, stopset0, stopset1, stopset2) THEN END END END PeepToken ; (* Expect - *) PROCEDURE Expect (t: toktype; stopset0: SetOfStop0; stopset1: SetOfStop1; stopset2: SetOfStop2) ; BEGIN IF currenttoken=t THEN GetToken ; IF Pass0 THEN PeepToken (stopset0, stopset1, stopset2) END ELSE MissingToken (t) END ; SyntaxCheck (stopset0, stopset1, stopset2) END Expect ; (* CompilationUnit - returns TRUE if the input was correct enough to parse in future passes. *) PROCEDURE CompilationUnit () : BOOLEAN ; BEGIN seenError := FALSE ; InsertCount := 0 ; FileUnit (SetOfStop0{eoftok}, SetOfStop1{}, SetOfStop2{}) ; RETURN NOT seenError END CompilationUnit ; (* Ident - error checking varient of Ident *) PROCEDURE Ident (stopset0: SetOfStop0; stopset1: SetOfStop1; stopset2: SetOfStop2) ; BEGIN LastIdent := makekey (currentstring) ; IF IsAutoPushOn () THEN PushTFtok (LastIdent, identtok, GetTokenNo()) END ; Expect (identtok, stopset0, stopset1, stopset2) END Ident ; (* string - *) PROCEDURE string (stopset0: SetOfStop0; stopset1: SetOfStop1; stopset2: SetOfStop2) ; BEGIN IF IsAutoPushOn () THEN PushTF (makekey (currentstring), stringtok) ; BuildString END ; Expect (stringtok, stopset0, stopset1, stopset2) END string ; (* Integer - *) PROCEDURE Integer (stopset0: SetOfStop0; stopset1: SetOfStop1; stopset2: SetOfStop2) ; BEGIN IF IsAutoPushOn() THEN PushTFtok (makekey (currentstring), integertok, GetTokenNo ()) ; BuildNumber END ; Expect(integertok, stopset0, stopset1, stopset2) END Integer ; (* Real - *) PROCEDURE Real (stopset0: SetOfStop0; stopset1: SetOfStop1; stopset2: SetOfStop2) ; BEGIN IF IsAutoPushOn() THEN PushTFtok (makekey (currentstring), realtok, GetTokenNo ()) ; BuildNumber END ; Expect(realtok, stopset0, stopset1, stopset2) END Real ; % module P0SyntaxCheck end END P0SyntaxCheck. % rules error 'ErrorArray' 'ErrorString' tokenfunc 'currenttoken' token '' eoftok -- internal token token '+' plustok token '-' minustok token '*' timestok token '/' dividetok token ':=' becomestok token '&' ambersandtok token "." periodtok token "," commatok token ";" semicolontok token '(' lparatok token ')' rparatok token '[' lsbratok -- left square brackets token ']' rsbratok -- right square brackets token '{' lcbratok -- left curly brackets token '}' rcbratok -- right curly brackets token '^' uparrowtok token "'" singlequotetok token '=' equaltok token '#' hashtok token '<' lesstok token '>' greatertok token '<>' lessgreatertok token '<=' lessequaltok token '>=' greaterequaltok token '<*' ldirectivetok token '*>' rdirectivetok token '..' periodperiodtok token ':' colontok token '"' doublequotestok token '|' bartok token 'AND' andtok token 'ARRAY' arraytok token 'BEGIN' begintok token 'BY' bytok token 'CASE' casetok token 'CONST' consttok token 'DEFINITION' definitiontok token 'DIV' divtok token 'DO' dotok token 'ELSE' elsetok token 'ELSIF' elsiftok token 'END' endtok token 'EXCEPT' excepttok token 'EXIT' exittok token 'EXPORT' exporttok token 'FINALLY' finallytok token 'FOR' fortok token 'FROM' fromtok token 'IF' iftok token 'IMPLEMENTATION' implementationtok token 'IMPORT' importtok token 'IN' intok token 'LOOP' looptok token 'MOD' modtok token 'MODULE' moduletok token 'NOT' nottok token 'OF' oftok token 'OR' ortok token 'PACKEDSET' packedsettok token 'POINTER' pointertok token 'PROCEDURE' proceduretok token 'QUALIFIED' qualifiedtok token 'UNQUALIFIED' unqualifiedtok token 'RECORD' recordtok token 'REM' remtok token 'REPEAT' repeattok token 'RETRY' retrytok token 'RETURN' returntok token 'SET' settok token 'THEN' thentok token 'TO' totok token 'TYPE' typetok token 'UNTIL' untiltok token 'VAR' vartok token 'WHILE' whiletok token 'WITH' withtok token 'ASM' asmtok token 'VOLATILE' volatiletok token '...' periodperiodperiodtok token '__DATE__' datetok token '__LINE__' linetok token '__FILE__' filetok token '__ATTRIBUTE__' attributetok token '__BUILTIN__' builtintok token '__INLINE__' inlinetok token 'integer number' integertok token 'identifier' identtok token 'real number' realtok token 'string' stringtok special Ident first { < identtok > } follow { } '@i{is a builtin and checks for an identifier}' special Integer first { < integertok > } follow { } '@i{is a builtin and checks for an integer}' special Real first { < realtok > } follow { } '@i{is a builtin and checks for an real constant}' special string first { < stringtok > } follow { } '@i{is a builtin and checks for an string constant}' BNF -- the following are provided by the module m2flex and also hand built procedures below -- Ident := Letter { ( Letter | Digit ) } =: -- Integer := Digit { Digit } | OctalDigit { OctalDigit } ( " B " | " C " ) | -- Digit { HexDigit } " H " =: -- Real := Digit { Digit } " . " { Digit } [ ScaleFactor ] =: -- ScaleFactor := " E " [ ( " + " | " - " ) ] Digit { Digit } =: -- HexDigit := Digit | " A " | " B " | " C " | " D " | " E " | " F " =: -- Digit := OctalDigit | " 8 " | " 9 " =: -- OctalDigit := "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" =: -- String FileUnit := % PushAutoOff % ( DefinitionModule | ImplementationOrProgramModule ) % PopAuto % =: ProgramModule := "MODULE" % PushAutoOn ; % % M2Error.DefaultProgramModule % Ident % RegisterProgramModule ; % % PushAutoOff ; % [ Priority ] ";" % PushAutoOn ; % { Import % RegisterImports % } % PopAuto % Block % PopAuto % Ident "." % EndModule % % PopAuto % =: ImplementationModule := "IMPLEMENTATION" % M2Error.DefaultImplementationModule % "MODULE" % PushAutoOn ; % Ident % RegisterImplementationModule ; % % PushAutoOff ; % [ Priority ] ";" % PushAutoOn ; % { Import % RegisterImports % } % PopAuto % Block % PopAuto % Ident % EndModule % % PopAuto % "." =: ImplementationOrProgramModule := ImplementationModule | ProgramModule =: Number := Integer | Real =: Qualident := Ident { "." Ident } =: ConstantDeclaration := Ident "=" ConstExpression =: ConstExpression := SimpleConstExpr [ Relation SimpleConstExpr ] =: Relation := "=" | "#" | "<>" | "<" | "<=" | ">" | ">=" | "IN" =: SimpleConstExpr := UnaryOrConstTerm { AddOperator ConstTerm } =: UnaryOrConstTerm := "+" ConstTerm | "-" ConstTerm | ConstTerm =: AddOperator := "+" | "-" | "OR" =: ConstTerm := ConstFactor { MulOperator ConstFactor } =: MulOperator := "*" | "/" | "DIV" | "MOD" | "REM" | "AND" | "&" =: ConstFactor := Number | ConstString | ConstSetOrQualidentOrFunction | "(" ConstExpression ")" | "NOT" ConstFactor | ConstAttribute =: -- to help satisfy LL1 ConstString := string =: ComponentElement := ConstExpression [ ".." ConstExpression ] =: ComponentValue := ComponentElement [ 'BY' ConstExpression ] =: ArraySetRecordValue := ComponentValue { ',' ComponentValue } =: Constructor := '{' [ ArraySetRecordValue ] '}' =: ConstSetOrQualidentOrFunction := Constructor | Qualident [ Constructor | ConstActualParameters ] =: ConstActualParameters := "(" [ ExpList ] ")" =: ConstAttribute := "__ATTRIBUTE__" "__BUILTIN__" "(" "(" ConstAttributeExpression ")" ")" =: ConstAttributeExpression := Ident | "<" Qualident ',' Ident ">" =: ByteAlignment := '<*' AttributeExpression '*>' =: -- AlignmentExpression := "(" ConstExpression ")" =: Alignment := [ ByteAlignment ] =: TypeDeclaration := Ident "=" Type Alignment =: Type := SimpleType | ArrayType | RecordType | SetType | PointerType | ProcedureType =: SimpleType := Qualident [ SubrangeType ] | Enumeration | SubrangeType =: Enumeration := "(" IdentList ")" =: IdentList := Ident % VAR on: BOOLEAN ; n : CARDINAL ; % % on := IsAutoPushOn() ; IF on THEN n := 1 END % { "," Ident % IF on THEN INC(n) END % } % IF on THEN PushT(n) END % =: SubrangeType := "[" ConstExpression ".." ConstExpression "]" =: ArrayType := "ARRAY" SimpleType { "," SimpleType } "OF" Type =: RecordType := "RECORD" [ DefaultRecordAttributes ] FieldListSequence "END" =: DefaultRecordAttributes := '<*' AttributeExpression '*>' =: RecordFieldPragma := [ '<*' FieldPragmaExpression { ',' FieldPragmaExpression } '*>' ] =: FieldPragmaExpression := Ident [ '(' ConstExpression ')' ] =: AttributeExpression := Ident '(' ConstExpression ')' =: FieldListSequence := FieldListStatement { ";" FieldListStatement } =: FieldListStatement := [ FieldList ] =: FieldList := IdentList ":" Type RecordFieldPragma | "CASE" CaseTag "OF" Varient { "|" Varient } [ "ELSE" FieldListSequence ] "END" =: TagIdent := [ Ident ] =: CaseTag := TagIdent [ ":" Qualident ] =: Varient := [ VarientCaseLabelList ":" FieldListSequence ] =: VarientCaseLabelList := VarientCaseLabels { "," VarientCaseLabels } =: VarientCaseLabels := ConstExpression [ ".." ConstExpression ] =: CaseLabelList := CaseLabels { "," CaseLabels } =: CaseLabels := ConstExpression [ ".." ConstExpression ] =: SetType := ( "SET" | "PACKEDSET" ) "OF" SimpleType =: PointerType := "POINTER" "TO" Type =: ProcedureType := "PROCEDURE" [ FormalTypeList ] =: FormalTypeList := "(" ( ")" FormalReturn | ProcedureParameters ")" FormalReturn ) =: FormalReturn := [ ":" OptReturnType ] =: OptReturnType := "[" Qualident "]" | Qualident =: ProcedureParameters := ProcedureParameter { "," ProcedureParameter } =: ProcedureParameter := "..." | "VAR" FormalType | FormalType =: VarIdent := Ident [ "[" ConstExpression "]" ] =: VariableDeclaration := VarIdentList ":" Type Alignment =: VarIdentList := VarIdent % VAR on: BOOLEAN ; n : CARDINAL ; % % on := IsAutoPushOn() ; IF on THEN n := 1 END % { "," VarIdent % IF on THEN INC(n) END % } % IF on THEN PushT(n) END % =: Designator := Qualident { SubDesignator } =: SubDesignator := "." Ident | "[" ExpList "]" | "^" =: ExpList := Expression { "," Expression } =: Expression := SimpleExpression [ Relation SimpleExpression ] =: SimpleExpression := [ "+" | "-" ] Term { AddOperator Term } =: Term := Factor { MulOperator Factor } =: Factor := Number | string | SetOrDesignatorOrFunction | "(" Expression ")" | "NOT" Factor | ConstAttribute =: SetOrDesignatorOrFunction := ( Qualident [ Constructor | SimpleDes [ ActualParameters ] ] | Constructor ) =: SimpleDes := { "." Ident | "[" ExpList "]" | "^" } =: ActualParameters := "(" [ ExpList ] ")" =: Statement := [ AssignmentOrProcedureCall | IfStatement | CaseStatement | WhileStatement | RepeatStatement | LoopStatement | ForStatement | WithStatement | AsmStatement | "EXIT" | "RETURN" [ Expression ] | RetryStatement ] =: RetryStatement := "RETRY" =: AssignmentOrProcedureCall := Designator ( ":=" Expression | ActualParameters | % (* epsilon *) % ) =: -- these two break LL1 as both start with a Designator -- ProcedureCall := Designator [ ActualParameters ] =: -- Assignment := Designator ":=" Expression =: StatementSequence := Statement { ";" Statement } =: IfStatement := "IF" Expression "THEN" StatementSequence { "ELSIF" Expression "THEN" StatementSequence } [ "ELSE" StatementSequence ] "END" =: CaseStatement := "CASE" Expression "OF" Case { "|" Case } [ "ELSE" StatementSequence ] "END" =: Case := [ CaseLabelList ":" StatementSequence ] =: WhileStatement := "WHILE" Expression "DO" StatementSequence "END" =: RepeatStatement := "REPEAT" StatementSequence "UNTIL" Expression =: ForStatement := "FOR" Ident ":=" Expression "TO" Expression [ "BY" ConstExpression ] "DO" StatementSequence "END" =: LoopStatement := "LOOP" StatementSequence "END" =: WithStatement := "WITH" Designator "DO" StatementSequence "END" =: ProcedureDeclaration := ProcedureHeading ";" ( ProcedureBlock % PushAutoOn % Ident % EndProcedure % % PopAuto % ) =: DefineBuiltinProcedure := [ "__ATTRIBUTE__" "__BUILTIN__" "(" "(" Ident ")" ")" | "__INLINE__" ] =: ProcedureHeading := "PROCEDURE" % M2Error.DefaultProcedure % DefineBuiltinProcedure ( % PushAutoOn % Ident % RegisterProcedure % % PopAuto % [ FormalParameters ] AttributeNoReturn ) =: AttributeNoReturn := [ "<*" Ident "*>" ] =: -- note that we do need to know whether builtins are used as they -- determine whether we need to parse the implementation module -- the same is true for hidden types Builtin := [ "__BUILTIN__" % PutModuleContainsBuiltin % | "__INLINE__" ] =: DefProcedureHeading := "PROCEDURE" % M2Error.DefaultProcedure % Builtin ( Ident [ DefFormalParameters ] AttributeNoReturn ) % M2Error.LeaveErrorScope % =: -- introduced procedure block so we can produce more informative -- error messages ProcedureBlock := { Declaration } [ "BEGIN" BlockBody ] "END" =: Block := { Declaration } InitialBlock FinalBlock "END" =: InitialBlock := [ "BEGIN" BlockBody ] =: FinalBlock := [ "FINALLY" BlockBody ] =: BlockBody := NormalPart [ "EXCEPT" ExceptionalPart ] =: NormalPart := StatementSequence =: ExceptionalPart := StatementSequence =: Declaration := "CONST" { ConstantDeclaration ";" } | "TYPE" { TypeDeclaration ";" } | "VAR" { VariableDeclaration ";" } | ProcedureDeclaration ";" | ModuleDeclaration ";" =: DefFormalParameters := "(" [ DefMultiFPSection ] ")" FormalReturn =: DefMultiFPSection := DefExtendedFP | FPSection [ ";" DefMultiFPSection ] =: FormalParameters := "(" [ MultiFPSection ] ")" FormalReturn =: MultiFPSection := ExtendedFP | FPSection [ ";" MultiFPSection ] =: FPSection := NonVarFPSection | VarFPSection =: DefExtendedFP := DefOptArg | "..." =: ExtendedFP := OptArg | "..." =: VarFPSection := "VAR" IdentList ":" FormalType =: NonVarFPSection := IdentList ":" FormalType =: OptArg := "[" Ident ":" FormalType [ "=" ConstExpression ] "]" =: DefOptArg := "[" Ident ":" FormalType "=" ConstExpression "]" =: FormalType := { "ARRAY" "OF" } Qualident =: ModuleDeclaration := "MODULE" % PushAutoOn % % M2Error.DefaultInnerModule % Ident % RegisterInnerModule % % PushAutoOff % [ Priority ] ";" % PushAutoOn % { Import % RegisterInnerImports % } % PopAuto % [ Export ] Block % PopAuto % Ident % EndModule % % PopAuto % =: Priority := "[" ConstExpression "]" =: Export := "EXPORT" ( "QUALIFIED" IdentList | "UNQUALIFIED" IdentList | IdentList ) ";" =: Import := "FROM" Ident "IMPORT" IdentList ";" | "IMPORT" % PushT(ImportTok) (* determines whether Ident or Module *) % IdentList ";" =: DefinitionModule := "DEFINITION" % M2Error.DefaultDefinitionModule % "MODULE" [ "FOR" string ] % PushAutoOn % Ident % RegisterDefinitionModule % ";" { Import % RegisterImports % } % PushAutoOff % [ Export ] { Definition } % PopAuto % "END" Ident % EndModule % "." % PopAuto % =: Definition := "CONST" { ConstantDeclaration ";" } | "TYPE" { Ident ( ";" % PutHiddenTypeDeclared % | "=" Type Alignment ";" ) } | "VAR" { VariableDeclaration ";" } | DefProcedureHeading ";" =: AsmStatement := 'ASM' [ 'VOLATILE' ] '(' AsmOperands ')' =: NamedOperand := '[' Ident ']' =: AsmOperandName := [ NamedOperand ] =: AsmOperands := string [ ':' AsmList [ ':' AsmList [ ':' TrashList ] ] ] =: AsmList := [ AsmElement ] { ',' AsmElement } =: AsmElement := AsmOperandName string '(' Expression ')' =: TrashList := [ string ] { ',' string } =: FNB