--
-- m2-2.bnf grammar and associated actions for pass 2.
--
-- Copyright (C) 2001-2023 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 P2Build begin
(* output from m2-2.bnf, automatically generated do not edit if these
are the top two lines in the file.
Copyright (C) 2001-2023 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 P2Build ;
FROM M2LexBuf IMPORT currentstring, currenttoken, GetToken, InsertToken, InsertTokenAndRewind, GetTokenNo ;
FROM M2MetaError IMPORT MetaErrorStringT0, MetaErrorT1 ;
FROM NameKey IMPORT NulName, Name, makekey, MakeKey ;
FROM M2Reserved IMPORT tokToTok, toktype, NulTok, ImportTok, ExportTok, QualifiedTok, UnQualifiedTok ;
FROM DynamicStrings IMPORT String, InitString, KillString, Mark, ConCat, ConCatChar ;
FROM M2Printf IMPORT printf0 ;
FROM M2Debug IMPORT Assert ;
FROM M2Quads IMPORT PushT, PopT, PushTF, PopTF, PopNothing, OperandT, PushTFA, Top, Annotate,
PushTFtok, PopTFtok, PushTFAtok, PopTtok, PushTtok,
StartBuildInit,
EndBuildInit,
BuildProcedureStart,
BuildProcedureEnd,
BuildAssignment,
BuildInline,
AddRecordToList, AddVarientToList,
IsAutoPushOn, PushAutoOff, PushAutoOn, PopAuto, DisplayStack ;
FROM P2SymBuild IMPORT P2StartBuildProgramModule,
P2EndBuildProgramModule,
P2StartBuildDefModule,
P2EndBuildDefModule,
P2StartBuildImplementationModule,
P2EndBuildImplementationModule,
StartBuildInnerModule,
EndBuildInnerModule,
BuildImportOuterModule,
BuildImportInnerModule,
BuildExportOuterModule,
BuildExportInnerModule,
BlockStart, BlockEnd, BlockBegin, BlockFinally,
BuildString, BuildNumber,
BuildConst,
BuildVariable,
BuildTypeEnd,
BuildNulName,
BuildType,
StartBuildEnumeration,
StartBuildFormalParameters,
EndBuildFormalParameters,
BuildFPSection,
BuildVarArgs,
BuildOptArg,
BuildFormalVarArgs,
BuildProcedureHeading,
StartBuildProcedure,
EndBuildProcedure,
BuildFunction, BuildOptFunction,
BuildNoReturnAttribute,
BuildPointerType,
BuildRecord, BuildFieldRecord,
StartBuildVarient, EndBuildVarient,
BuildVarientSelector,
StartBuildVarientFieldRecord,
EndBuildVarientFieldRecord,
BuildNulName,
StartBuildArray,
EndBuildArray,
BuildFieldArray, BuildArrayComma,
BuildSubrange, BuildAligned,
BuildTypeAlignment, BuildVarAlignment,
P2BuildDefaultFieldAlignment, BuildPragmaConst,
BuildSetType,
BuildFormalType, BuildFunction, BuildProcedureType,
DetermineType, PushType, PopType,
SeenUnknown, SeenSet, SeenString, SeenArray, SeenConstructor,
SeenCast,
PushRememberConstant, PopRememberConstant ;
FROM M2Reserved IMPORT ArrayTok, VarTok ;
FROM SymbolTable IMPORT MakeGnuAsm, PutGnuAsmVolatile, PutGnuAsm, PutGnuAsmInput,
PutGnuAsmOutput, PutGnuAsmTrash, PutGnuAsmVolatile,
MakeRegInterface,
PutRegInterface, GetRegInterface,
GetSymName, GetType, MakeConstLit,
NulSym,
StartScope, EndScope,
PutIncluded,
PutExceptionFinally, PutExceptionBlock, GetCurrentScope,
IsVarParam, IsProcedure, IsDefImp, IsModule,
IsRecord, IsAModula2Type,
RequestSym ;
IMPORT M2Error ;
CONST
Debugging = FALSE ;
Pass1 = FALSE ; (* permanently disabled for the time being *)
Pass2 = TRUE ;
Pass3 = FALSE ; (* permanently disabled for the time being *)
VAR
WasNoError: BOOLEAN ;
PROCEDURE ErrorString (s: String) ;
BEGIN
MetaErrorStringT0 (GetTokenNo (), s) ;
WasNoError := FALSE
END ErrorString ;
PROCEDURE ErrorArray (a: ARRAY OF CHAR) ;
BEGIN
ErrorString (InitString (a))
END ErrorArray ;
% declaration P2Build begin
(*
checkReturnAttribute -
*)
PROCEDURE checkReturnAttribute ;
VAR
ident: Name ;
tok : CARDINAL ;
BEGIN
PopTtok (ident, tok) ;
IF ident # MakeKey ('noreturn')
THEN
MetaErrorT1 (tok, 'attribute {%1k} is not allowed in the procedure return type, only noreturn is allowed', ident)
END
END checkReturnAttribute ;
(*
checkParameterAttribute -
*)
PROCEDURE checkParameterAttribute ;
VAR
ident: Name ;
tok : CARDINAL ;
BEGIN
PopTtok (ident, tok) ;
IF ident # MakeKey ('unused')
THEN
MetaErrorT1 (tok, 'attribute {%1k} is not allowed in the parameter formal type section, only unused is allowed', ident)
END
END checkParameterAttribute ;
(*
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
INCL (s0, t)
ELSIF ORD (t) <64
THEN
INCL (s1, t)
ELSE
INCL (s2, t)
END ;
str := DescribeStop (s0, s1, s2) ;
str := ConCat (InitString ('syntax error,'), Mark (str)) ;
MetaErrorStringT0 (GetTokenNo (), str)
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 ;
(*
CheckAndInsert -
*)
PROCEDURE CheckAndInsert (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
WarnMissingToken(t) ;
InsertTokenAndRewind(t) ;
RETURN( TRUE )
ELSE
RETURN( FALSE )
END
END CheckAndInsert ;
(*
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 <identtok> 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 would fail since currentoken is not part of the stopset
we check to see whether any of currenttoken might be a commonly omitted token *)
IF CheckAndInsert(semicolontok, stopset0, stopset1, stopset2) OR
CheckAndInsert(rsbratok, stopset0, stopset1, stopset2) OR
CheckAndInsert(rparatok, stopset0, stopset1, stopset2) OR
CheckAndInsert(rcbratok, stopset0, stopset1, stopset2) OR
CheckAndInsert(periodtok, stopset0, stopset1, stopset2) OR
CheckAndInsert(oftok, stopset0, stopset1, stopset2) OR
CheckAndInsert(endtok, stopset0, stopset1, stopset2) OR
CheckAndInsert(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 Pass1
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
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
PushTFtok(makekey(currentstring), identtok, GetTokenNo()) ;
Annotate("%1n|identtok||Ident rule")
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 P2Build end
END P2Build.
% 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 { }
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 handbuilt 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 := % PushAutoOn %
( DefinitionModule |
ImplementationOrProgramModule ) % PopAuto %
=:
ProgramModule := "MODULE" % M2Error.DefaultProgramModule %
% BlockStart (GetTokenNo () -1) %
Ident % P2StartBuildProgramModule ; %
[ Priority
]
";"
{ Import % BuildImportOuterModule ; %
}
Block
% BlockEnd (GetTokenNo () -1) %
Ident % P2EndBuildProgramModule ; %
"."
=:
ImplementationModule := "IMPLEMENTATION" % M2Error.DefaultImplementationModule %
% BlockStart (GetTokenNo () -1) %
"MODULE"
Ident % P2StartBuildImplementationModule ; %
[ Priority
] ";"
{ Import % BuildImportOuterModule %
}
Block
% BlockEnd (GetTokenNo () -1) %
Ident % P2EndBuildImplementationModule ; %
"." =:
ImplementationOrProgramModule := ImplementationModule | ProgramModule =:
Number := Integer | Real =:
Qualident := % VAR name: Name ;
Type, Sym, tok: CARDINAL ; %
Ident
% IF IsAutoPushOn()
THEN
PopTtok(name, tok) ;
Sym := RequestSym (tok, name) ;
IF IsDefImp(Sym) OR IsModule(Sym)
THEN
Expect(periodtok, stopset0, stopset1, stopset2 + SetOfStop2{identtok}) ;
StartScope(Sym) ;
Qualident(stopset0, stopset1, stopset2) ;
(* should we test for lack of ident? *)
PopTFtok(Sym, Type, tok) ;
PushTFtok(Sym, Type, tok) ;
Annotate("%1s(%1d)|%1s(%1d)||qualident|type") ;
EndScope ;
PutIncluded(Sym)
ELSE
PushTFtok(Sym, GetType(Sym), tok) ;
Annotate("%1s(%1d)|%1s(%1d)||qualident|type")
END
ELSE (* just parse qualident *) %
{ "." Ident } % END %
=:
ConstantDeclaration := Ident "=" % SeenUnknown ;
BuildConst %
ConstExpressionInitial % DetermineType ;
PopNothing %
=:
ConstExpressionInitial := % PushAutoOff %
SimpleConstExpr [ Relation SimpleConstExpr ] % PopAuto %
=:
ConstExpression := % PushType ; SeenUnknown ; PushAutoOff %
SimpleConstExpr [ Relation SimpleConstExpr ] % PopAuto ; PopType %
=:
Relation := % SeenUnknown (* actually it will be a BOOLEAN, but this is not a constructor and not a string *) %
"=" | "#" | "<>" | "<" | "<=" | ">" | ">=" | "IN" =:
SimpleConstExpr := UnaryOrConstTerm { AddOperator ConstTerm } =:
UnaryOrConstTerm := "+" ConstTerm | "-" ConstTerm | ConstTerm =:
AddOperator := "+" | "-" |
"OR" % SeenUnknown (* actually it will be a BOOLEAN, but this is not a constructor and not a string *) %
=:
ConstTerm := ConstFactor { MulOperator ConstFactor } =:
MulOperator := "*" | "/"
| "DIV" % SeenUnknown %
| "MOD" % SeenUnknown %
| "REM" % SeenUnknown %
| "AND" % SeenUnknown %
| "&" % SeenUnknown %
=:
ConstFactor := Number | ConstString | ConstSetOrQualidentOrFunction |
"(" ConstExpression ")" | "NOT" ConstFactor |
ConstAttribute =:
-- to help satisfy LL1
ConstString := string % SeenString %
=:
ComponentElement := ConstExpression [ ".." % PopType ; SeenSet ; PushType ; SeenUnknown %
ConstExpression ] =:
ComponentValue := % PushType ; SeenUnknown ; PushRememberConstant %
ComponentElement [ 'BY' % PopType ; SeenArray ; PushType ; SeenUnknown %
ConstExpression ]
% PopType (* double check position, it must balance PushType *) %
% PopRememberConstant %
=:
ArraySetRecordValue := ComponentValue { ',' ComponentValue } =:
Constructor := '{' % SeenConstructor %
[ ArraySetRecordValue ] '}' =:
ConstSetOrQualidentOrFunction := Constructor | Qualident
[ Constructor | ConstActualParameters ] =:
ConstActualParameters := % PushType ; SeenUnknown %
"(" [ ExpList ] ")" % PopType %
=:
-- to help satisfy LL1
ConstAttribute := "__ATTRIBUTE__" "__BUILTIN__" "(" "(" ConstAttributeExpression ")" ")" =:
ConstAttributeExpression := Ident | "<" Qualident ',' Ident ">" =:
ByteAlignment := '<*' % PushAutoOn %
AttributeExpression % BuildAligned %
% PopAuto %
'*>' =:
-- OptAlignmentExpression := [ AlignmentExpression ] =:
-- AlignmentExpression := "(" ConstExpression ")" =:
Alignment := ByteAlignment | % PushT(NulSym) %
=:
TypeDeclaration := % VAR top: CARDINAL ; %
% top := Top() %
Ident "=" Type Alignment % BuildTypeAlignment %
% Assert(top=Top()) %
=:
Type :=
% PushAutoOn ; %
( SimpleType | ArrayType % BuildType ; %
| RecordType % BuildType ; %
| SetType % BuildType ; %
| PointerType % BuildType ; %
| ProcedureType % BuildType ; %
) % PopAuto ; %
=:
SimpleType :=
( Qualident [ PrefixedSubrangeType ] % BuildType ; %
| Enumeration % BuildType ; %
| SubrangeType % BuildType ; %
)
=:
Enumeration := "("
( IdentList
)
")" % StartBuildEnumeration ; %
=:
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(NulSym) %
=:
PrefixedSubrangeType := "[" ConstExpression ".." ConstExpression "]" % VAR t: CARDINAL ; %
% PopT(t) ;
BuildSubrange(t) %
=:
ArrayType := "ARRAY" % VAR arrayType, tok: CARDINAL ; %
% StartBuildArray ;
PopTtok(arrayType, tok) ;
PushTtok(arrayType, tok) ;
BuildNulName ; %
SimpleType % BuildFieldArray ; %
{ "," % BuildArrayComma ;
BuildNulName ; %
SimpleType % BuildFieldArray ; %
} "OF" % BuildNulName ; %
Type % EndBuildArray ;
PopNothing ;
PushTtok(arrayType, tok) %
=:
RecordType := "RECORD" % BuildRecord %
[ DefaultRecordAttributes ]
FieldListSequence "END" =:
DefaultRecordAttributes := '<*' % PushAutoOn %
AttributeExpression % P2BuildDefaultFieldAlignment %
% PopAuto %
'*>' =:
RecordFieldPragma := ( '<*' FieldPragmaExpression % VAR n: CARDINAL ; %
% n := 1 %
% PushT(n) %
% Annotate('(%1d)||pragma count') %
{ ',' % PopT(n) %
FieldPragmaExpression % INC(n) %
% PushT(n) %
% Annotate('(%1d)||pragma count') %
} '*>' | % n := 0 %
% PushT(n) %
% Annotate('(%1d)||pragma count') %
) =:
FieldPragmaExpression := % PushAutoOn %
Ident PragmaConstExpression
% PopAuto %
=:
PragmaConstExpression := ( % PushAutoOff %
'(' ConstExpression % BuildPragmaConst %
')' % PopAuto %
| % PushT(NulSym) %
% Annotate('NulSym||no pragma const') %
) =:
AttributeExpression := Ident '(' ConstExpression ')' =:
FieldListSequence := FieldListStatement { ";" FieldListStatement } =:
FieldListStatement := [ FieldList ] =:
-- sadly the PIM rules are not LL1 as Ident and Qualident have the same first
-- symbols. We rewrite FieldList to inline qualident
FieldList := IdentList ":" % BuildNulName %
Type RecordFieldPragma % BuildFieldRecord %
|
"CASE" % AddRecordToList %
% StartBuildVarient %
% AddVarientToList %
CaseTag "OF"
Varient { "|" Varient }
[ "ELSE" % StartBuildVarientFieldRecord %
FieldListSequence % EndBuildVarientFieldRecord %
] "END" % EndBuildVarient %
=:
TagIdent := Ident | % BuildNulName %
=:
CaseTag := TagIdent ( ":" Qualident | % PushT(NulSym) %
) % BuildVarientSelector %
=:
Varient := [ % StartBuildVarientFieldRecord %
VarientCaseLabelList ":" FieldListSequence % EndBuildVarientFieldRecord %
]
=:
VarientCaseLabelList := VarientCaseLabels { "," VarientCaseLabels } =:
VarientCaseLabels := ConstExpression [ ".." ConstExpression ] =:
CaseLabelList := CaseLabels { "," CaseLabels } =:
CaseLabels := ConstExpression [ ".." ConstExpression ] =:
SetType := % VAR ispacked: BOOLEAN ; %
% ispacked := FALSE %
( "SET" % ispacked := FALSE %
| "PACKEDSET" % ispacked := TRUE %
) "OF" % BuildNulName %
SimpleType % BuildSetType (ispacked) %
=:
PointerType := "POINTER" "TO" % BuildNulName %
Type % BuildPointerType %
=:
ProcedureType := "PROCEDURE" % BuildProcedureType ; %
[ FormalTypeList ] =:
FormalTypeList := "(" ( ")" FormalReturn |
ProcedureParameters
")" FormalReturn ) =:
FormalReturn := [ ":" OptReturnType ] =:
OptReturnType := "[" Qualident % BuildOptFunction %
"]" | Qualident % BuildFunction %
=:
ProcedureParameters := ProcedureParameter
{ "," ProcedureParameter } =:
ProcedureParameter := "..." % BuildFormalVarArgs %
| "VAR" % PushT(VarTok) ; %
FormalType % BuildFormalType ; %
| % PushT(NulTok) ; %
FormalType % BuildFormalType ; %
=:
VarIdent := Ident % VAR
on : BOOLEAN ;
Sym, Type, tok: CARDINAL ; %
[ "[" % on := IsAutoPushOn() ;
IF on
THEN
PopTFtok(Sym, Type, tok) ;
PushTFAtok(Sym, Type, Sym, tok)
END %
ConstExpression "]" ]
=:
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 ":" % BuildNulName %
% DisplayStack %
Type % DisplayStack %
Alignment % DisplayStack %
% BuildVarAlignment %
% DisplayStack %
% BuildVariable %
=:
Designator := Qualident { SubDesignator } =:
SubDesignator := "." Ident | "[" ExpList "]" | "^" =:
ExpList := Expression { "," Expression } =:
Expression := % PushType ; SeenUnknown ; PushAutoOff %
SimpleExpression [ Relation SimpleExpression ] % PopAuto ; PopType %
=:
SimpleExpression := UnaryOrTerm { AddOperator Term } =:
UnaryOrTerm := "+" Term | "-" Term | 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 := % PushAutoOff ; %
[ AssignmentOrProcedureCall | IfStatement | CaseStatement |
WhileStatement | RepeatStatement | LoopStatement |
ForStatement | WithStatement | AsmStatement |
"EXIT" | "RETURN" [ Expression ] | RetryStatement ] % PopAuto ; %
=:
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 % Assert(IsProcedure(OperandT(1))) %
";" ( ProcedureBlock
% Assert(IsProcedure(OperandT(1))) %
Ident )
% EndBuildProcedure %
=:
DefineBuiltinProcedure := [ "__ATTRIBUTE__" "__BUILTIN__"
"(" "(" % PushAutoOff %
Ident % PopAuto %
")" ")" | "__INLINE__" ]
=:
ProcedureHeading := "PROCEDURE" % M2Error.DefaultProcedure %
DefineBuiltinProcedure
( Ident
% StartBuildProcedure %
% Assert(IsProcedure(OperandT(1))) %
% StartBuildFormalParameters %
[ FormalParameters ] % EndBuildFormalParameters %
AttributeNoReturn
% BuildProcedureHeading %
)
=:
Builtin := [ "__BUILTIN__" | "__INLINE__" ] =:
DefProcedureHeading := "PROCEDURE" % M2Error.DefaultProcedure %
Builtin
( Ident
% StartBuildProcedure %
% Assert(IsProcedure(OperandT(1))) %
% StartBuildFormalParameters %
[ DefFormalParameters ] % EndBuildFormalParameters %
AttributeNoReturn
% BuildProcedureHeading %
) % M2Error.LeaveErrorScope %
=:
AttributeNoReturn := [ "<*" % PushAutoOn %
Ident % PopAuto %
% checkReturnAttribute %
% Assert(IsProcedure(OperandT(1))) %
% BuildNoReturnAttribute (OperandT(1)) %
"*>" ] =:
AttributeUnused := [ "<*" % PushAutoOn %
Ident % PopAuto %
% checkParameterAttribute %
"*>" ] =:
-- introduced procedure block so we can produce more informative
-- error messages
ProcedureBlock := % Assert(IsProcedure(OperandT(1))) %
{ % Assert(IsProcedure(OperandT(1))) %
Declaration % Assert(IsProcedure(OperandT(1))) %
} [ "BEGIN" ProcedureBlockBody ] "END" % Assert(IsProcedure(OperandT(1))) %
=:
Block := { Declaration } InitialBlock FinalBlock "END" =:
InitialBlock := [ "BEGIN" % BlockBegin (GetTokenNo () -1) %
InitialBlockBody ] =:
FinalBlock := [ "FINALLY" % BlockFinally (GetTokenNo () -1) %
FinalBlockBody ] =:
InitialBlockBody := NormalPart [ "EXCEPT" % PutExceptionBlock(GetCurrentScope()) %
ExceptionalPart ] =:
FinalBlockBody := NormalPart [ "EXCEPT" % PutExceptionFinally(GetCurrentScope()) %
ExceptionalPart ] =:
ProcedureBlockBody := NormalPart [ "EXCEPT" % PutExceptionBlock(GetCurrentScope()) %
ExceptionalPart ] =:
NormalPart := StatementSequence =:
ExceptionalPart := StatementSequence =:
Declaration := "CONST" { ConstantDeclaration ";" } |
"TYPE" { TypeDeclaration ";" } |
"VAR" { VariableDeclaration ";" } |
ProcedureDeclaration ";" |
ModuleDeclaration ";" =:
DefFormalParameters := "("
[ DefMultiFPSection ] % VAR n: CARDINAL; %
% PopT(n) ; (* remove param count *) %
")"
FormalReturn % PushT(n) ; (* restore param count *) %
=:
DefMultiFPSection := DefExtendedFP |
FPSection [ ";" DefMultiFPSection ] =:
FormalParameters := "("
[ MultiFPSection ] % VAR n: CARDINAL; %
% PopT(n) ; (* remove param count *) %
")"
FormalReturn % PushT(n) ; (* restore param count *) %
=:
MultiFPSection := ExtendedFP |
FPSection [ ";" MultiFPSection ] =:
FPSection := NonVarFPSection | VarFPSection
=:
DefExtendedFP := DefOptArg | "..." % BuildVarArgs %
=:
ExtendedFP := OptArg | "..." % BuildVarArgs %
=:
OptArg := "[" % VAR n: CARDINAL ; %
% PopT(n) %
% PushT(NulTok) %
Ident % PushT(1) %
":" FormalType % PushT(n) %
% BuildFPSection %
% BuildOptArg %
[ "=" ConstExpression ]
"]" =:
DefOptArg := "[" % VAR n: CARDINAL ; %
% PopT(n) %
% PushT(NulTok) %
Ident % PushT(1) %
":" FormalType % PushT(n) %
% BuildFPSection %
% BuildOptArg %
"=" ConstExpression
"]" =:
VarFPSection := "VAR" % VAR n: CARDINAL ; %
% PopT(n) ; %
% PushT(VarTok) ; %
IdentList ":" FormalType % PushT(n) %
[ AttributeUnused ]
% BuildFPSection %
=:
NonVarFPSection := % VAR n: CARDINAL ; %
% PopT(n) %
% PushT(NulTok) %
IdentList ":" FormalType % PushT(n) %
[ AttributeUnused ]
% BuildFPSection %
=:
FormalType := "ARRAY" "OF" % VAR n: CARDINAL ; %
% PushTF(ArrayTok, 1) %
{ "ARRAY" "OF" % PopTF(ArrayTok, n) %
% INC(n) %
% PushTF(ArrayTok, n) %
} Qualident
| % VAR Sym, Type: CARDINAL ; %
Qualident
% PopTF(Sym, Type) ;
PushT(NulTok) ;
PushTF(Sym, Type) %
=:
ModuleDeclaration := "MODULE" % M2Error.DefaultInnerModule %
% BlockStart (GetTokenNo () -1) %
Ident % StartBuildInnerModule %
[ Priority
] ";"
{ Import % BuildImportInnerModule %
} [ Export % BuildExportInnerModule %
]
Block
% BlockEnd (GetTokenNo () -1) %
Ident % EndBuildInnerModule %
=:
Priority := "[" ConstExpression "]" =:
Export := "EXPORT" ( "QUALIFIED" % PushT(QualifiedTok) %
IdentList |
"UNQUALIFIED" % PushT(UnQualifiedTok) %
IdentList | % PushT(ExportTok) %
IdentList ) ";" =:
Import := "FROM" Ident "IMPORT" IdentList ";" |
"IMPORT" % PushT(ImportTok)
(* determines whether Ident or Module *) %
IdentList ";" =:
DefinitionModule := "DEFINITION" % M2Error.DefaultDefinitionModule %
"MODULE"
[ "FOR" string ]
Ident % P2StartBuildDefModule %
";"
{ Import % BuildImportOuterModule %
} [ Export % BuildExportOuterModule %
]
{ Definition }
"END" Ident % P2EndBuildDefModule %
"."
=:
Definition := "CONST" { ConstantDeclaration ";" } |
"TYPE"
{ Ident ( ";"
| "=" Type Alignment % BuildVarAlignment %
";" ) % BuildTypeEnd %
}
|
"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