| -- |
| -- m2-h.bnf grammar and associated actions for pass h. |
| -- |
| -- Copyright (C) 2001-2025 Free Software Foundation, Inc. |
| -- Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>. |
| -- |
| -- 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 |
| -- <http://www.gnu.org/licenses/>. |
| % module PHBuild begin |
| (* output from m2-h.bnf, automatically generated do not edit if these |
| are the top two lines in the file. |
| |
| Copyright (C) 2001-2025 Free Software Foundation, Inc. |
| Contributed by Gaius Mulley <gaius.mulley@southwales.ac.uk>. |
| |
| 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 <https://www.gnu.org/licenses/>. *) |
| |
| IMPLEMENTATION MODULE PHBuild ; |
| |
| FROM M2LexBuf IMPORT currentstring, currenttoken, GetToken, InsertToken, |
| InsertTokenAndRewind, GetTokenNo, MakeVirtualTok ; |
| |
| FROM M2Error IMPORT ErrorStringAt ; |
| FROM NameKey IMPORT NulName, Name, makekey ; |
| FROM M2Reserved IMPORT NulTok, ByTok, PeriodPeriodTok, tokToTok, toktype ; |
| FROM DynamicStrings IMPORT String, InitString, KillString, Mark, ConCat, ConCatChar ; |
| FROM M2Printf IMPORT printf0 ; |
| FROM M2Debug IMPORT Assert ; |
| FROM P2SymBuild IMPORT BuildString, BuildNumber ; |
| |
| FROM M2Quads IMPORT PushT, PopT, PushTF, PopTF, PopNothing, Annotate, |
| PushTtok, PushTFtok, PopTtok, PopTFtok, OperandTok, |
| PushTFntok, Top, DupFrame, |
| StartBuildDefFile, StartBuildModFile, |
| BuildModuleStart, |
| EndBuildFile, |
| StartBuildInit, |
| EndBuildInit, |
| BuildProcedureStart, |
| BuildProcedureEnd, |
| BuildAssignment, BuildAssignConstant, |
| BuildFunctionCall, BuildConstFunctionCall, |
| BuildBinaryOp, BuildUnaryOp, BuildRelOp, BuildNot, |
| BuildEmptySet, BuildInclRange, BuildInclBit, |
| BuildSetStart, BuildSetEnd, |
| BuildSizeCheckStart, |
| BuildRepeat, BuildUntil, |
| BuildWhile, BuildDoWhile, BuildEndWhile, |
| BuildLoop, BuildExit, BuildEndLoop, |
| BuildThenIf, BuildElse, BuildEndIf, |
| BuildForToByDo, BuildPseudoBy, BuildEndFor, |
| BuildElsif1, BuildElsif2, |
| BuildProcedureCall, BuildReturn, BuildNulExpression, |
| StartBuildWith, EndBuildWith, |
| BuildCaseStart, |
| BuildCaseOr, |
| BuildCaseElse, |
| BuildCaseEnd, |
| BuildCaseStartStatementSequence, |
| BuildCaseEndStatementSequence, |
| BuildCaseList, |
| BuildCaseRange, BuildCaseEquality, |
| BuildConstructorStart, |
| BuildConstructorEnd, |
| SilentBuildConstructorStart, |
| BuildComponentValue, BuildTypeForConstructor, |
| BuildBooleanVariable, BuildAlignment, |
| RecordOp, |
| BuildNulParam, |
| BuildDesignatorRecord, |
| BuildDesignatorArray, |
| BuildDesignatorPointer, |
| BeginVarient, EndVarient, ElseVarient, |
| BeginVarientList, EndVarientList, |
| AddVarientRange, AddVarientEquality, |
| BuildDefaultFieldAlignment, BuildPragmaField, |
| CheckWithReference, DisplayStack, Annotate, |
| IsAutoPushOn, PushAutoOff, PushAutoOn, PopAuto, |
| PushInConstExpression, PopInConstExpression ; |
| |
| FROM P3SymBuild IMPORT P3StartBuildProgModule, |
| P3EndBuildProgModule, |
| |
| P3StartBuildDefModule, |
| P3EndBuildDefModule, |
| |
| P3StartBuildImpModule, |
| P3EndBuildImpModule, |
| |
| StartBuildInnerModule, |
| EndBuildInnerModule, |
| |
| StartBuildProcedure, |
| BuildProcedureHeading, |
| EndBuildProcedure, |
| BuildConst, |
| BuildSubrange, |
| BuildNulName ; |
| |
| FROM P3SymBuild IMPORT CheckCanBeImported ; |
| |
| FROM SymbolTable IMPORT MakeGnuAsm, PutGnuAsmVolatile, PutGnuAsm, PutGnuAsmInput, |
| PutGnuAsmOutput, PutGnuAsmTrash, PutGnuAsmVolatile, |
| MakeRegInterface, |
| PutRegInterface, GetRegInterface, |
| GetSymName, GetType, GetCurrentModule, |
| NulSym, |
| StartScope, EndScope, |
| PutIncluded, |
| IsVarParam, IsProcedure, IsDefImp, IsModule, |
| IsRecord, IsProcType, IsInnerModule, IsImported, |
| RequestSym, |
| GetSym, GetLocalSym ; |
| |
| FROM M2Batch IMPORT IsModuleKnown ; |
| |
| FROM M2CaseList IMPORT BeginCaseList, EndCaseList, ElseCase ; |
| |
| FROM M2Reserved IMPORT NulTok, ImportTok, ExportTok, QualifiedTok, UnQualifiedTok, |
| EqualTok, HashTok, LessGreaterTok, LessTok, LessEqualTok, |
| GreaterTok, GreaterEqualTok, InTok, PlusTok, MinusTok, |
| OrTok, TimesTok, DivTok, DivideTok, ModTok, RemTok, AndTok, |
| AmbersandTok ; |
| |
| IMPORT M2Error ; |
| |
| |
| CONST |
| Debugging = FALSE ; |
| |
| VAR |
| WasNoError: BOOLEAN ; |
| |
| |
| (* |
| BlockAssert - used when developing, if disabled the bug (incorrect stack level) |
| will be caught by the block and a user error issued. |
| This procedure useful to detect the failure earlier. |
| *) |
| |
| PROCEDURE BlockAssert (value: BOOLEAN) ; |
| BEGIN |
| IF Debugging |
| THEN |
| Assert (value) |
| END |
| END BlockAssert ; |
| |
| |
| PROCEDURE ErrorString (s: String) ; |
| BEGIN |
| ErrorStringAt(s, GetTokenNo()) ; |
| WasNoError := FALSE |
| END ErrorString ; |
| |
| |
| PROCEDURE ErrorArray (a: ARRAY OF CHAR) ; |
| BEGIN |
| ErrorString(InitString(a)) |
| END ErrorArray ; |
| |
| |
| % declaration PHBuild 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 ; |
| |
| |
| (* |
| WarnMissingToken - generates a warning message about a missing token, t. |
| *) |
| |
| PROCEDURE WarnMissingToken (t: toktype) ; |
| 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) ; |
| |
| str := ConCat(InitString('syntax error,'), Mark(str)) ; |
| ErrorStringAt(str, GetTokenNo()) |
| END WarnMissingToken ; |
| |
| |
| (* |
| MissingToken - generates a warning message about a missing token, t. |
| *) |
| |
| PROCEDURE MissingToken (t: toktype) ; |
| BEGIN |
| WarnMissingToken(t) ; |
| IF (t#identtok) AND (t#integertok) AND (t#realtok) AND (t#stringtok) |
| THEN |
| IF Debugging |
| THEN |
| printf0('inserting token\n') |
| END ; |
| InsertToken(t) |
| END |
| END MissingToken ; |
| |
| |
| (* |
| Expect - |
| *) |
| |
| PROCEDURE Expect (tok: toktype; stopset0: SetOfStop0; stopset1: SetOfStop1; |
| stopset2: SetOfStop2) ; |
| BEGIN |
| IF currenttoken=tok |
| THEN |
| GetToken |
| ELSE |
| MissingToken (tok) |
| 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 |
| WasNoError := TRUE ; |
| FileUnit (SetOfStop0{eoftok}, SetOfStop1{}, SetOfStop2{}) ; |
| RETURN WasNoError |
| END CompilationUnit ; |
| |
| |
| (* |
| Ident - error checking varient of Ident |
| *) |
| |
| PROCEDURE Ident (stopset0: SetOfStop0; stopset1: SetOfStop1; stopset2: SetOfStop2) ; |
| BEGIN |
| IF IsAutoPushOn () |
| THEN |
| PushTF (makekey (currentstring), identtok) |
| 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 ; |
| |
| |
| (* |
| PushTFQualident - push the result of the Qualident |
| to the stack. It checks to see if init |
| is a procedure or proc type and if so |
| it does not push the return type. |
| *) |
| |
| PROCEDURE PushTFQualident (tok, tokstart: CARDINAL; |
| init: CARDINAL) ; |
| BEGIN |
| IF tok#tokstart |
| THEN |
| tok := MakeVirtualTok (tokstart, tokstart, tok) |
| END ; |
| IF IsProcedure (init) OR IsProcType (init) |
| THEN |
| PushTtok (init, tok) ; |
| Annotate ("%1s(%1d)||qualident procedure/proctype") ; |
| ELSE |
| Annotate ("%1s(%1d)|%1s(%1d)||qualident|type") ; |
| PushTFtok (init, GetType (init), tok) ; |
| END |
| END PushTFQualident ; |
| |
| |
| (* |
| CheckModuleQualident - check to see if the beginning ident of the qualident is an |
| imported module. |
| *) |
| |
| PROCEDURE CheckModuleQualident (stopset0: SetOfStop0; |
| stopset1: SetOfStop1; |
| stopset2: SetOfStop2) ; |
| VAR |
| name : Name ; |
| init, |
| nextLevel, |
| tok, tokstart: CARDINAL ; |
| BEGIN |
| PopTtok (name, tokstart) ; |
| tok := tokstart ; |
| init := RequestSym (tok, name) ; |
| IF IsImported (GetCurrentModule (), init) AND (IsDefImp (init) OR IsModule (init)) |
| THEN |
| WHILE IsDefImp (init) OR IsModule (init) DO |
| Expect (periodtok, stopset0, stopset1, stopset2 + SetOfStop2{identtok}) ; |
| StartScope (init) ; |
| Ident (stopset0, stopset1, stopset2) ; |
| PopTtok (name, tok) ; |
| nextLevel := RequestSym (tok, name) ; |
| EndScope ; |
| CheckCanBeImported (init, nextLevel) ; |
| init := nextLevel |
| END ; |
| PushTFQualident (tok, tokstart, init) ; |
| PutIncluded (init) |
| ELSE |
| PushTFQualident (tok, tokstart, init) |
| END |
| END CheckModuleQualident ; |
| |
| % module PHBuild end |
| END PHBuild. |
| % 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 'FORWARD' forwardtok |
| 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 { } |
| special Integer first { < integertok > } follow { } |
| special Real first { < realtok > } follow { } |
| special string first { < stringtok > } follow { } |
| |
| BNF |
| |
| -- the following are provided by the module m2flex and also handbuild 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 := % VAR begint, endt: CARDINAL ; % |
| % begint := GetTokenNo () % |
| "MODULE" % M2Error.DefaultProgramModule % |
| % PushAutoOn % |
| Ident % P3StartBuildProgModule % |
| % BuildModuleStart (begint) % |
| % PushAutoOff % |
| [ Priority |
| ] |
| ";" |
| { Import |
| } % begint := GetTokenNo () % |
| % StartBuildInit (begint) % |
| Block % PushAutoOn % |
| % endt := GetTokenNo () -1 % |
| Ident % EndBuildFile (endt) % |
| % P3EndBuildProgModule % |
| "." % PopAuto ; |
| EndBuildInit (endt) ; |
| PopAuto % |
| =: |
| |
| ImplementationModule := % VAR begint, endt: CARDINAL ; % |
| % begint := GetTokenNo () % |
| "IMPLEMENTATION" % M2Error.DefaultImplementationModule % |
| "MODULE" % PushAutoOn % |
| Ident % StartBuildModFile (begint) % |
| % P3StartBuildImpModule % |
| % BuildModuleStart (begint) % |
| % PushAutoOff % |
| [ Priority |
| ] ";" |
| { Import |
| } % begint := GetTokenNo () % |
| % StartBuildInit (begint) % |
| Block % PushAutoOn % |
| % endt := GetTokenNo () -1 % |
| Ident % EndBuildFile (endt) % |
| % P3EndBuildImpModule % |
| "." % PopAuto ; |
| EndBuildInit (endt) ; |
| PopAuto ; |
| PopAuto % |
| =: |
| |
| ImplementationOrProgramModule := % PushAutoOff % |
| ( ImplementationModule | ProgramModule ) % PopAuto % |
| =: |
| |
| Number := Integer | Real =: |
| |
| |
| Qualident := Ident |
| % IF IsAutoPushOn() |
| THEN |
| CheckModuleQualident (stopset0, stopset1, stopset2) |
| ELSE (* just parse qualident *) % |
| { "." Ident } % END % |
| =: |
| |
| ConstantDeclaration := % PushAutoOn % |
| % VAR tokno: CARDINAL ; % |
| ( Ident "=" % tokno := GetTokenNo () % |
| % BuildConst % |
| ConstExpression ) % BuildAssignConstant (tokno) % |
| % PopAuto % |
| =: |
| |
| ConstExpression := % VAR tokpos: CARDINAL ; % |
| % PushInConstExpression % |
| % PushAutoOn % |
| SimpleConstExpr [ Relation % tokpos := GetTokenNo ()-1 % |
| SimpleConstExpr % BuildRelOp (tokpos) % |
| ] % PopAuto % |
| % PopInConstExpression % |
| =: |
| |
| Relation := "=" % PushTtok(EqualTok, GetTokenNo() -1) % |
| | "#" % PushTtok(HashTok, GetTokenNo() -1) % |
| | "<>" % PushTtok(LessGreaterTok, GetTokenNo() -1) % |
| | "<" % PushTtok(LessTok, GetTokenNo() -1) % |
| | "<=" % PushTtok(LessEqualTok, GetTokenNo() -1) % |
| | ">" % PushTtok(GreaterTok, GetTokenNo() -1) % |
| | ">=" % PushTtok(GreaterEqualTok, GetTokenNo() -1) % |
| | "IN" % PushTtok(InTok, GetTokenNo() -1) % |
| =: |
| |
| SimpleConstExpr := UnaryOrConstTerm { AddOperator ConstTerm % BuildBinaryOp % |
| } =: |
| |
| UnaryOrConstTerm := "+" % PushTtok(PlusTok, GetTokenNo() -1) % |
| ConstTerm % BuildUnaryOp % |
| | |
| "-" % PushTtok(MinusTok, GetTokenNo() -1) % |
| ConstTerm % BuildUnaryOp % |
| | |
| ConstTerm =: |
| |
| AddOperator := "+" % PushTtok(PlusTok, GetTokenNo() -1) ; |
| RecordOp % |
| | "-" % PushTtok(MinusTok, GetTokenNo() -1) ; |
| RecordOp % |
| | "OR" % PushTtok(OrTok, GetTokenNo() -1) ; |
| RecordOp % |
| =: |
| |
| ConstTerm := ConstFactor { MulOperator ConstFactor % BuildBinaryOp % |
| } =: |
| |
| MulOperator := "*" % PushTtok(TimesTok, GetTokenNo() -1) ; |
| RecordOp % |
| | "/" % PushTtok(DivideTok, GetTokenNo() -1) ; |
| RecordOp % |
| | "DIV" % PushTtok(DivTok, GetTokenNo() -1) ; |
| RecordOp % |
| | "MOD" % PushTtok(ModTok, GetTokenNo() -1) ; |
| RecordOp % |
| | "REM" % PushTtok(RemTok, GetTokenNo() -1) ; |
| RecordOp % |
| | "AND" % PushTtok(AndTok, GetTokenNo() -1) ; |
| RecordOp % |
| | "&" % PushTtok(AmbersandTok, GetTokenNo() -1) ; |
| RecordOp % |
| =: |
| |
| ConstFactor := % VAR tokpos: CARDINAL ; % |
| Number | ConstString | ConstSetOrQualidentOrFunction | |
| "(" ConstExpression ")" | "NOT" % tokpos := GetTokenNo() -1 % |
| ConstFactor % BuildNot (tokpos) % |
| | ConstAttribute =: |
| |
| -- to help satisfy LL1 |
| |
| ConstString := string =: |
| |
| ComponentElement := ConstExpression ( ".." ConstExpression % PushT(PeriodPeriodTok) % |
| | % PushT(NulTok) % |
| ) |
| =: |
| |
| ComponentValue := ComponentElement ( 'BY' ConstExpression % PushT(ByTok) % |
| |
| | % PushT(NulTok) % |
| ) |
| =: |
| |
| ArraySetRecordValue := ComponentValue % BuildComponentValue % |
| { ',' ComponentValue % BuildComponentValue % |
| } |
| =: |
| |
| Constructor := % VAR tokpos: CARDINAL ; % |
| % DisplayStack % |
| '{' % tokpos := GetTokenNo () -1 % |
| % BuildConstructorStart (tokpos) % |
| [ ArraySetRecordValue ] % BuildConstructorEnd (tokpos, GetTokenNo()) % |
| '}' =: |
| |
| ConstSetOrQualidentOrFunction := % PushAutoOn % |
| % VAR tokpos: CARDINAL ; % |
| % tokpos := GetTokenNo () % |
| ( |
| Qualident |
| [ Constructor | |
| ConstActualParameters % BuildConstFunctionCall % |
| ] |
| | % BuildTypeForConstructor (tokpos) % |
| Constructor |
| ) % PopAuto % |
| =: |
| |
| ConstAttribute := "__ATTRIBUTE__" "__BUILTIN__" "(" "(" ConstAttributeExpression ")" ")" =: |
| |
| ConstAttributeExpression := Ident | "<" Qualident ',' Ident ">" =: |
| |
| ByteAlignment := % VAR tokpos: CARDINAL ; % |
| '<*' % PushAutoOn % |
| % tokpos := GetTokenNo () % |
| AttributeExpression % BuildAlignment (tokpos) % |
| '*>' % PopAuto % |
| =: |
| |
| -- OptAlignmentExpression := [ AlignmentExpression ] =: |
| |
| -- AlignmentExpression := "(" ConstExpression ")" =: |
| |
| Alignment := [ ByteAlignment ] =: |
| |
| TypeDeclaration := % VAR top: CARDINAL ; % |
| % top := Top () % |
| Ident "=" Type Alignment |
| % BlockAssert (top = Top ()) % |
| =: |
| |
| Type := |
| % PushAutoOff % |
| ( SimpleType | ArrayType |
| | RecordType |
| | SetType |
| | PointerType |
| | ProcedureType ) % PopAuto % |
| =: |
| |
| SimpleType := % VAR top: CARDINAL ; % |
| % top := Top () % |
| ( Qualident [ SubrangeType ] | Enumeration | SubrangeType ) |
| % BlockAssert (top = Top ()) % |
| =: |
| |
| 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 "]" % BuildSubrange ; % |
| =: |
| |
| ArrayType := "ARRAY" |
| |
| SimpleType |
| { "," |
| SimpleType |
| } "OF" |
| Type |
| =: |
| |
| RecordType := "RECORD" [ DefaultRecordAttributes ] FieldListSequence "END" =: |
| |
| DefaultRecordAttributes := '<*' % PushAutoOn % |
| AttributeExpression % BuildDefaultFieldAlignment % |
| % PopAuto % |
| '*>' =: |
| |
| RecordFieldPragma := [ '<*' FieldPragmaExpression |
| { ',' FieldPragmaExpression } '*>' ] =: |
| |
| FieldPragmaExpression := % PushAutoOn % |
| Ident PragmaConstExpression % BuildPragmaField % |
| % PopAuto % |
| =: |
| |
| PragmaConstExpression := ( '(' ConstExpression ')' | % PushT(NulSym) % |
| % Annotate('NulSym||no pragma const') % |
| ) =: |
| |
| AttributeExpression := Ident '(' ConstExpression ')' =: |
| |
| FieldListSequence := FieldListStatement { ";" FieldListStatement } =: |
| |
| -- at present FieldListStatement is as follows: |
| FieldListStatement := [ FieldList ] =: |
| -- later replace it with FieldList to comply with PIM2 |
| |
| -- sadly the PIM rules are not LL1 as Ident and Qualident have the same first |
| -- symbols. We rewrite FieldList to inline qualident |
| -- was |
| -- FieldList := IdentList ":" % BuildNulName % |
| -- Type | |
| -- "CASE" [ Ident ] [ ":" Qualident ] "OF" Varient { "|" Varient } |
| -- [ "ELSE" FieldListSequence ] "END" =: |
| |
| FieldList := IdentList ":" |
| Type RecordFieldPragma |
| | |
| "CASE" % BeginVarient % |
| CaseTag "OF" |
| Varient { "|" Varient } |
| [ "ELSE" % ElseVarient % |
| FieldListSequence |
| ] "END" % EndVarient % |
| =: |
| |
| TagIdent := [ Ident ] =: |
| |
| CaseTag := TagIdent [":" Qualident ] =: |
| |
| Varient := [ % BeginVarientList % |
| VarientCaseLabelList ":" FieldListSequence % EndVarientList % |
| ] =: |
| |
| VarientCaseLabelList := VarientCaseLabels { "," VarientCaseLabels } =: |
| |
| VarientCaseLabels := ConstExpression ( ".." ConstExpression % AddVarientRange % |
| | % AddVarientEquality ; (* epsilon *) % |
| ) |
| =: |
| |
| SilentCaseLabelList := SilentCaseLabels { "," SilentCaseLabels } =: |
| |
| SilentCaseLabels := SilentConstExpression [ ".." SilentConstExpression ] =: |
| |
| -- |
| -- the following rules are a copy of the ConstExpression ebnf rules but without |
| -- any actions all prefixed with Silent. |
| -- |
| |
| SilentConstExpression := % PushAutoOff % |
| SilentSimpleConstExpr |
| [ SilentRelation SilentSimpleConstExpr ] % PopAuto % |
| =: |
| |
| SilentRelation := "=" | "#" | "<>" | "<" | "<=" | ">" | ">=" | "IN" =: |
| |
| SilentSimpleConstExpr := SilentUnaryOrConstTerm { SilentAddOperator SilentConstTerm } =: |
| |
| SilentUnaryOrConstTerm := "+" SilentConstTerm | "-" SilentConstTerm | SilentConstTerm =: |
| |
| SilentAddOperator := "+" | "-" | "OR" =: |
| |
| SilentConstTerm := SilentConstFactor { SilentMulOperator SilentConstFactor } =: |
| |
| SilentMulOperator := "*" | "/" | "DIV" | "MOD" | "REM" | "AND" | "&" =: |
| |
| SilentConstFactor := Number | SilentConstString | SilentConstSetOrQualidentOrFunction | |
| "(" SilentConstExpression ")" | "NOT" SilentConstFactor |
| | SilentConstAttribute =: |
| |
| SilentConstString := string =: |
| |
| SilentConstAttribute := "__ATTRIBUTE__" "__BUILTIN__" "(" "(" SilentConstAttributeExpression ")" ")" =: |
| |
| SilentConstAttributeExpression := Ident | "<" Ident ',' SilentConstString ">" =: |
| |
| SilentConstSetOrQualidentOrFunction := Qualident [ SilentConstructor | SilentActualParameters ] | |
| SilentConstructor =: |
| |
| SilentSetOrDesignatorOrFunction := ( Qualident |
| [ SilentConstructor | |
| SilentSimpleDes [ SilentActualParameters ] |
| ] | SilentConstructor ) |
| =: |
| |
| SilentSimpleDes := { SilentSubDesignator } =: |
| |
| SilentConstructor := "{" % SilentBuildConstructorStart % |
| [ SilentElement { "," SilentElement } ] "}" =: |
| |
| SilentElement := SilentConstExpression [ ".." SilentConstExpression ] =: |
| |
| SilentActualParameters := "(" [ SilentExpList ] ")" =: |
| |
| SilentSubDesignator := "." Ident | "[" SilentExpList "]" | "^" |
| =: |
| |
| SilentExpList := SilentExpression { "," SilentExpression } =: |
| |
| SilentDesignator := Qualident { SilentSubDesignator } =: |
| |
| SilentExpression := |
| SilentSimpleExpression |
| [ SilentRelation |
| SilentSimpleExpression ] |
| =: |
| |
| SilentSimpleExpression := SilentUnaryOrTerm { SilentAddOperator SilentTerm } =: |
| |
| SilentUnaryOrTerm := "+" |
| SilentTerm |
| | "-" |
| SilentTerm |
| | SilentTerm =: |
| |
| SilentTerm := SilentFactor { SilentMulOperator SilentFactor |
| } =: |
| |
| SilentFactor := Number | string | SilentSetOrDesignatorOrFunction | |
| "(" SilentExpression ")" | "NOT" SilentFactor | ConstAttribute =: |
| |
| -- end of the Silent constant rules |
| |
| 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 := % VAR Sym, Type: CARDINAL ; % |
| Ident [ "[" ConstExpression % PopTF(Sym, Type) % |
| "]" ] |
| =: |
| |
| 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 % |
| =: |
| |
| VariableDeclaration := VarIdentList ":" Type Alignment |
| =: |
| |
| Designator := Qualident |
| { SubDesignator } =: |
| |
| SubDesignator := "." |
| Ident |
| | "[" ExpList |
| "]" |
| | "^" |
| =: |
| |
| ExpList := |
| Expression |
| { "," |
| Expression |
| } |
| =: |
| |
| |
| Expression := |
| SimpleExpression [ SilentRelation SimpleExpression |
| ] |
| =: |
| |
| SimpleExpression := UnaryOrTerm { SilentAddOperator Term |
| } =: |
| |
| UnaryOrTerm := "+" |
| Term |
| | "-" |
| Term |
| | Term =: |
| |
| Term := Factor { SilentMulOperator Factor |
| } =: |
| |
| Factor := Number | string | SetOrDesignatorOrFunction | |
| "(" Expression ")" | "NOT" Factor | ConstAttribute =: |
| |
| -- again Set | Designator causes problems as both have a first symbol, ident or Qualident |
| |
| ParseConstructor := "{" [ SilentElement { "," SilentElement } ] "}" =: |
| |
| |
| SetOrDesignatorOrFunction := % VAR n: CARDINAL ; % |
| % n := Top () % |
| % Assert (NOT IsAutoPushOn ()) % |
| ( Qualident [ ParseConstructor |
| | |
| SilentSimpleDes [ SilentActualParameters ] |
| ] | |
| ParseConstructor |
| ) |
| % Assert (n = Top ()) % |
| =: |
| |
| ConstActualParameters := "(" % BuildSizeCheckStart % |
| ( ConstExpList | % BuildNulParam % |
| ) ")" =: |
| |
| ConstExpList := % VAR n: CARDINAL ; % |
| ConstExpression % BuildBooleanVariable % |
| % n := 1 % |
| { "," |
| ConstExpression % BuildBooleanVariable % |
| % INC(n) % |
| } |
| % PushT(n) % |
| =: |
| |
| Statement := |
| [ AssignmentOrProcedureCall | IfStatement | CaseStatement | |
| WhileStatement | RepeatStatement | LoopStatement | |
| ForStatement | WithStatement | AsmStatement | |
| "EXIT" |
| | "RETURN" |
| ( Expression | % (* in epsilon *) % |
| ) | RetryStatement |
| ] |
| =: |
| |
| RetryStatement := "RETRY" =: |
| |
| AssignmentOrProcedureCall := Designator ( ":=" SilentExpression | |
| SilentActualParameters | % (* in epsilon *) % |
| ) =: |
| |
| -- these two break LL1 as both start with a Designator |
| -- ProcedureCall := Designator [ ActualParameters ] =: |
| -- Assignment := Designator ":=" Expression =: |
| |
| StatementSequence := |
| Statement |
| { ";" |
| Statement } |
| =: |
| |
| IfStatement := |
| "IF" |
| SilentExpression "THEN" |
| StatementSequence |
| { "ELSIF" |
| Expression "THEN" |
| StatementSequence |
| } |
| [ "ELSE" |
| StatementSequence ] "END" |
| =: |
| |
| CaseStatement := "CASE" |
| SilentExpression |
| "OF" Case { "|" Case } |
| [ "ELSE" |
| StatementSequence ] "END" |
| =: |
| |
| Case := [ SilentCaseLabelList ":" StatementSequence ] =: |
| |
| WhileStatement := "WHILE" |
| SilentExpression |
| "DO" |
| StatementSequence |
| "END" |
| =: |
| |
| RepeatStatement := "REPEAT" |
| StatementSequence |
| "UNTIL" |
| SilentExpression |
| =: |
| |
| ForStatement := "FOR" |
| Ident ":=" SilentExpression "TO" SilentExpression |
| ( "BY" SilentConstExpression | % (* epsilon *) % |
| ) "DO" |
| StatementSequence "END" |
| =: |
| |
| LoopStatement := "LOOP" |
| StatementSequence |
| "END" |
| =: |
| |
| WithStatement := "WITH" |
| SilentDesignator "DO" |
| StatementSequence |
| "END" |
| =: |
| |
| ProcedureDeclaration := % VAR top: CARDINAL ; % |
| % top := Top () % |
| ProcedureHeading ";" PostProcedureHeading % BlockAssert (top = Top ()) % |
| =: |
| |
| PostProcedureHeading := ProperProcedure | ForwardDeclaration =: |
| |
| ForwardDeclaration := "FORWARD" % DupFrame % |
| % EndBuildProcedure % |
| =: |
| ProperProcedure := ProcedureBlock % PushAutoOn % |
| Ident % EndBuildProcedure % |
| % PopAuto % |
| =: |
| |
| DefineBuiltinProcedure := [ "__ATTRIBUTE__" "__BUILTIN__" "(" "(" Ident ")" ")" | |
| "__INLINE__" ] =: |
| |
| ProcedureHeading := "PROCEDURE" % M2Error.DefaultProcedure % |
| DefineBuiltinProcedure % PushAutoOn % |
| ( Ident % StartBuildProcedure % |
| % PushAutoOff % |
| [ FormalParameters ] AttributeNoReturn |
| % PopAuto % |
| ) % PopAuto % |
| =: |
| |
| Builtin := [ "__BUILTIN__" | "__INLINE__" ] =: |
| |
| DefProcedureHeading := "PROCEDURE" % M2Error.DefaultProcedure % |
| Builtin |
| ( Ident |
| [ DefFormalParameters ] AttributeNoReturn |
| ) % M2Error.LeaveErrorScope % |
| =: |
| |
| AttributeNoReturn := [ "<*" Ident "*>" ] =: |
| |
| AttributeUnused := [ "<*" Ident "*>" ] =: |
| |
| -- introduced procedure block so we can produce more informative |
| -- error messages |
| |
| ProcedureBlock := { Declaration } [ "BEGIN" BlockBody ] "END" |
| =: |
| |
| Block := % VAR top: CARDINAL ; % |
| % top := Top () % |
| { Declaration } % BlockAssert (top = Top ()) % |
| InitialBlock % BlockAssert (top = Top ()) % |
| FinalBlock % BlockAssert (top = Top ()) % |
| "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 [ AttributeUnused ] =: |
| |
| NonVarFPSection := IdentList ":" FormalType [ AttributeUnused ] =: |
| |
| OptArg := "[" Ident ":" FormalType [ "=" SilentConstExpression ] "]" =: |
| |
| DefOptArg := "[" Ident ":" FormalType "=" SilentConstExpression "]" =: |
| |
| FormalType := { "ARRAY" "OF" } Qualident =: |
| |
| ModuleDeclaration := % VAR begint: CARDINAL ; % |
| % begint := GetTokenNo () % |
| "MODULE" % M2Error.DefaultInnerModule % |
| % PushAutoOn % |
| Ident % StartBuildInnerModule ; |
| BuildModuleStart (begint) ; |
| |
| PushAutoOff % |
| [ Priority ] ";" |
| { Import |
| } [ Export |
| ] |
| Block % PushAutoOn % |
| Ident % EndBuildInnerModule % |
| % PopAuto ; PopAuto ; PopAuto % |
| =: |
| |
| Priority := "[" SilentConstExpression "]" =: |
| |
| Export := "EXPORT" ( "QUALIFIED" |
| IdentList | |
| "UNQUALIFIED" |
| IdentList | |
| IdentList ) ";" =: |
| |
| Import := "FROM" Ident "IMPORT" IdentList ";" | |
| "IMPORT" |
| IdentList ";" =: |
| |
| DefinitionModule := % VAR begint, endt: CARDINAL ; % |
| % begint := GetTokenNo () % |
| "DEFINITION" % M2Error.DefaultDefinitionModule % |
| "MODULE" % PushAutoOn % |
| [ "FOR" string ] |
| Ident % StartBuildDefFile (begint) ; |
| P3StartBuildDefModule ; |
| PushAutoOff % |
| ";" |
| { Import |
| } [ Export |
| ] |
| { Definition } % endt := GetTokenNo () % |
| "END" % PushAutoOn % |
| Ident % EndBuildFile (endt) ; |
| P3EndBuildDefModule % |
| "." % PopAuto ; PopAuto ; PopAuto % |
| =: |
| |
| Definition := "CONST" { ConstantDeclaration ";" } | |
| "TYPE" |
| { Ident ( ";" |
| | "=" Type Alignment ";" ) |
| } |
| | |
| "VAR" { VariableDeclaration ";" } | |
| DefProcedureHeading ";" =: |
| |
| AsmStatement := 'ASM' [ 'VOLATILE' ] '(' AsmOperands ')' =: |
| |
| NamedOperand := '[' Ident ']' =: |
| |
| AsmOperandName := [ NamedOperand ] =: |
| |
| AsmOperands := ConstExpression [ ':' AsmList [ ':' AsmList [ ':' TrashList ] ] ] |
| =: |
| |
| AsmList := [ AsmElement ] { ',' AsmElement } =: |
| |
| AsmElement := AsmOperandName ConstExpression '(' Expression ')' |
| =: |
| |
| TrashList := [ ConstExpression ] { ',' ConstExpression } =: |
| |
| FNB |
