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tdevelop/languages/pascal/pascal.g

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//
//
// Pascal Grammar
//
// Adapted from,
// Pascal User Manual And Report (Second Edition-1978)
// Kathleen Jensen - Niklaus Wirth
//
// By
//
// Hakki Dogusan dogusanh@tr-net.net.tr
//
// Then significantly enhanced by Piet Schoutteten
// with some guidance by Terence Parr. Piet added tree
// construction, and some tree walkers.
//
//
// Turbo Pascal, Free Pascal and Delphi pascal extensions
// by Alexander Dymo <cloudtemple@mksat.net>
//
//
// Adapted from,
// Free Pascal: Reference Guide 1.9 April 2002
//
//
// KDevelop 3.0 support by Alexander Dymo <cloudtemple@mksat.net>
//
header "pre_include_hpp" {
#include "problemreporter.h"
#include "PascalAST.hpp"
#include <qlistview.h>
#include <kdebug.h>
#define SET_POSITION(ast,t)\
{ \
RefPascalAST(ast)->setLine( t->getLine() );\
RefPascalAST(ast)->setColumn( t->getColumn() ); \
}
}
options {
language="Cpp";
}
class PascalParser extends Parser;
options {
k = 2; // two token lookahead
exportVocab=Pascal; // Call its vocabulary "Pascal"
codeGenMakeSwitchThreshold = 2; // Some optimizations
codeGenBitsetTestThreshold = 3;
defaultErrorHandler = true; // Generate parser error handlers
buildAST = true;
ASTLabelType = "RefPascalAST";
}
/* Define imaginary tokens used to organize tree
*
* One of the principles here is that any time you have a list of
* stuff, you usually want to treat it like one thing (a list) a some
* point in the grammar. You want trees to have a fixed number of tqchildren
* as much as possible. For example, the definition of a procedure should
* be something like #(PROCEDURE ID #(ARGDECLS ARG1 ARG2...)) not
* #(PROCEDURE ID ARG1 ARG2 ... ) since this is harder to parse and
* harder to manipulate. Same is true for statement lists (BLOCK) etc...
*/
tokens {
BLOCK; // list of statements
IDLIST; // list of identifiers; e.g., #(PROGRAM #(IDLIST ID ID...))
ELIST; // expression list for proc args etc...
FUNC_CALL;
PROC_CALL;
SCALARTYPE; // IDLIST that is really a scalar type like (Mon,Tue,Wed)
TYPELIST; // list of types such as for array declarations
VARIANT_TAG;// for CASEs in a RECORD
VARIANT_TAG_NO_ID;// for CASEs in a RECORD (no id, just a type)
VARIANT_CASE;// a case of the variant
CONSTLIST; // List of constants
FIELDLIST; // list of fields in a record
ARGDECLS; // overall group of declarations of args for proc/func.
VARDECL; // declaration of a variable
ARGDECL; // declaration of a parameter
ARGLIST; // list of actual arguments (expressions)
TYPEDECL; // declaration of a type
FIELD; // the root a RECORD field
}
// Define some methods and variables to use in the generated parser.
{
private:
unsigned int m_numberOfErrors;
ProblemReporter* m_problemReporter;
public:
void resetErrors() { m_numberOfErrors = 0; }
unsigned int numberOfErrors() const { return m_numberOfErrors; }
void setProblemReporter( ProblemReporter* r ) { m_problemReporter = r; }
void reportError( const ANTLR_USE_NAMESPACE(antlr)RecognitionException& ex ){
m_problemReporter->reportError( ex.getMessage().c_str(),
ex.getFilename().c_str(),
ex.getLine(),
ex.getColumn() );
++m_numberOfErrors;
}
void reportError( const ANTLR_USE_NAMESPACE(std)string& errorMessage ){
m_problemReporter->reportError( errorMessage.c_str(),
getFilename().c_str(),
LT(1)->getLine(),
LT(1)->getColumn() );
++m_numberOfErrors;
}
void reportMessage( const ANTLR_USE_NAMESPACE(std)string& message ){
m_problemReporter->reportMessage( message.c_str(),
getFilename().c_str(),
LT(1)->getLine(),
LT(1)->getColumn() );
}
}
compilationUnit
: program
| library
| unit
;
program
: programHeading
(usesClause)?
block
DOT!
;
library
: LIBRARY^ identifier SEMI!
(usesClause)?
libraryBlock
exportsClause
END! DOT!
;
libraryBlock
: declarationPart (statementPart)?
;
exportsClause
: EXPORTS^
exportsList
;
exportsList
: exportsEntry ( COMMA! exportsEntry )* (SEMI!)?
;
exportsEntry
: identifier ("index" integerConstant)? ("name" stringConstant)?
;
usesClause
: USES^ identifierList SEMI!
;
unit
: UNIT^ identifier SEMI!
interfacePart
implementationPart
( (initializationPart (finalizationPart)?) | realizationPart )?
END!
;
interfacePart
: INTERFACE^
(usesClause)?
( constantDeclarationPart
| typeDeclarationPart
| procedureHeadersPart
)*
;
implementationPart
: IMPLEMENTATION^
(usesClause)?
declarationPart
;
realizationPart
: BEGIN^ statement ( SEMI! statement )*
;
programHeading
: PROGRAM^ identifier (LPAREN! identifierList RPAREN!)? SEMI!
;
initializationPart
: INITIALIZATION^
statement ( SEMI! statement )*
;
finalizationPart
: FINALIZATION^
statement ( SEMI! statement )*
;
block
: declarationPart statementPart
;
declarationPart
: (labelDeclarationPart
| constantDeclarationPart
| resourcestringDeclarationPart
| typeDeclarationPart
| variableDeclarationPart
| procedureAndFunctionDeclarationPart
)*
;
labelDeclarationPart
: LABEL^ label ( COMMA! label )* SEMI!
;
constantDeclarationPart
: CONST^ ( constantDeclaration | typedConstantDeclaration )+
;
resourcestringDeclarationPart
: RESOURCESTRING^ ( stringConstantDeclaration )*
;
stringConstantDeclaration
: identifier EQUAL! string
;
typeDeclarationPart
: TYPE^ ( typeDeclaration )+
;
variableDeclarationPart
: VAR^ variableDeclaration ( SEMI! variableDeclaration )* SEMI!
;
variableDeclaration
: identifierList c:COLON^ {#c->setType(VARDECL);} type
;
procedureAndFunctionDeclarationPart
: procedureAndFunctionDeclaration
;
procedureAndFunctionDeclaration
: procedureDeclaration
| functionDeclaration
| constructorDeclaration
| destructorDeclaration
;
statementPart
: compoundStatement
;
procedureDeclaration
: procedureHeader subroutineBlock SEMI!
;
procedureHeadersPart
: procedureHeader | functionHeader // ) SEMI! ( callModifiers SEMI! )
;
procedureHeader
: PROCEDURE^ ( identifier | qualifiedMethodIdentifier )
(formalParameterList)? SEMI! (modifiers SEMI!)*
;
qualifiedMethodIdentifier
: identifier COLON! COLON! identifier
;
subroutineBlock
: block
| externalDirective
// | asmBlock
| FORWARD!
;
functionDeclaration
: functionHeader subroutineBlock SEMI!
;
functionHeader
: (FUNCTION^ identifier COLON! type SEMI!)=> FUNCTION^ identifier COLON! type SEMI! (modifiers SEMI!)*
| (FUNCTION^ identifier COLON! COLON! identifier COLON! type SEMI!)=> FUNCTION^ qualifiedMethodIdentifier COLON! type SEMI! (modifiers SEMI!)*
| (FUNCTION^ identifier COLON! COLON! identifier LPAREN!)=> FUNCTION^ qualifiedMethodIdentifier formalParameterList COLON! type SEMI! (modifiers SEMI!)*
| FUNCTION^ identifier formalParameterList COLON! type SEMI! (modifiers SEMI!)*
;
functionHeaderEnding
: (COLON! type SEMI!)=> COLON! type SEMI! (modifiers SEMI!)*
| formalParameterList COLON! type SEMI! (modifiers SEMI!)*
;
formalParameterList
: LPAREN! parameterDeclaration ( SEMI! parameterDeclaration )* RPAREN!
;
parameterDeclaration
: valueParameter
| variableParameter
| constantParameter
;
valueParameter
: (identifierList COLON! ARRAY! OF!)=> identifierList COLON! ARRAY! OF! type
| identifierList COLON! type
;
variableParameter
: VAR identifierList ( untypedParameterPart )?
;
untypedParameterPart
: (COLON! ARRAY! OF! type)=> COLON! ARRAY! OF! type
| COLON! type
;
constantParameter
: CONST identifierList ( untypedParameterPart )?
;
externalDirective
: EXTERNAL^ ( stringConstant ( ("name" stringConstant) | ("index" integerConstant) )? )?
;
/*asmBlock
: ASSEMBLER^ SEMI! declarationPart asmStatement
;
*/
modifiers
: PUBLIC! | (ALIAS! stringConstant) | INTERRUPT! | callModifiers | EXPORT!
;
callModifiers
: REGISTER! | PASCAL! | CDECL! | STDCALL! | POPSTACK! | SAVEREGISTERS! | INLINE! | SAFECALL! | NEAR! | FAR!
;
constantDeclaration
// : ( identifier EQUAL! expression SEMI! ) ( identifier EQUAL! expression SEMI! )*
: identifier EQUAL! expression SEMI!
;
typedConstantDeclaration
// : ( identifier COLON! type EQUAL! typedConstant SEMI! )+
: identifier COLON! type EQUAL! typedConstant SEMI!
;
//FIXME: is there a better way to handle this instead of simply forcing the rules
typedConstant
: (constant)=> constant
// | addressConstant
| (LPAREN! identifier COLON!)=> recordConstant
| (arrayConstant)=> arrayConstant
| proceduralConstant
;
arrayConstant
: LPAREN! ( constant | arrayConstant ) ( COMMA! ( constant | arrayConstant ) )* RPAREN!
;
recordConstant
: LPAREN! ( identifier COLON! constant ) ( SEMI! ( identifier COLON! constant ) )* RPAREN!
;
addressConstant
: NUM_INT
;
proceduralConstant
: expression
;
typeDeclaration
: identifier EQUAL! type SEMI!
;
type
// : simpleType | subrangeType | enumeratedType | stringType | structuredType | pointerType | proceduralType | typeIdentifier
: simpleType | subrangeTypeOrTypeIdentifier | enumeratedType | stringType | structuredType | pointerType | proceduralType
;
simpleType
: ordinalType | realType
;
ordinalType
: INTEGER! | SHORTINT! | SMALLINT! | LONGINT! | INT64! | BYTE! | WORD! | CARDINAL! | QWORD!
| BOOLEAN! | BYTEBOOL! | LONGBOOL! | CHAR!
;
subrangeTypeOrTypeIdentifier
: constant (DOTDOT! constant)?
;
typeIdentifier
: identifier
;
subrangeType
: constant DOTDOT! constant
;
enumeratedType
: (LPAREN! identifier ASSIGN!)=> LPAREN! assignedEnumList RPAREN!
| LPAREN! identifierList RPAREN!
;
assignedEnumList
: (identifier ASSIGN! expression) ( COMMA! (identifier ASSIGN! expression) )*
;
realType
: REAL! | SINGLE! | DOUBLE! | EXTENDED! | COMP!
;
stringType
: STRING^ ( LBRACK! unsignedInteger RBRACK! )?
;
structuredType
: (PACKED!)? ( arrayType | recordType | objectType | classType | setType | fileType )
;
arrayType
: ARRAY^ LBRACK! arrayIndexType ( COMMA! arrayIndexType )* RBRACK! OF! type
;
arrayIndexType
: ordinalType
| (expression DOTDOT!)=> arraySubrangeType
| enumeratedType
;
arraySubrangeType
: expression DOTDOT! expression
;
recordType
: RECORD^ (fieldList)* END!
;
fieldList
: fixedField | variantPart
;
fixedField
: identifierList COLON! type SEMI!
;
variantPart
: CASE^ (identifier COLON!)? identifier OF! variant ( SEMI! variant )*
;
variant
: (constant COMMA!)+ COLON! LPAREN! (fieldList)* RPAREN!
;
setType
: SET^ OF! ordinalType
;
fileType
: FILE^ OF! type
;
pointerType
: POINTER^ typeIdentifier
;
proceduralType
: (proceduralTypePart1 SEMI!)=> proceduralTypePart1 SEMI! callModifiers
| proceduralTypePart1
;
proceduralTypePart1
: ( functionHeader | procedureHeader ) (OF! OBJECT!)?
;
objectType
: OBJECT^ (heritage)? (componentList | objectVisibilitySpecifier ) END!
;
heritage
: LPAREN! identifier RPAREN!
;
componentList
: ( (fieldDefinition)+ )? ( (methodDefinition)+ )?
;
fieldDefinition
: identifierList COLON! type SEMI!
;
methodDefinition
: ( functionHeader | procedureHeader | constructorHeader | destructorHeader ) SEMI! methodDirectives
;
methodDirectives
: ( VIRTUAL! SEMI! (ABSTRACT! SEMI!)? )? (callModifiers SEMI!)?
;
objectVisibilitySpecifier
: PRIVATE! | PROTECTED! | PUBLIC!
;
constructorDeclaration
: constructorHeader SEMI! subroutineBlock
;
destructorDeclaration
: destructorHeader SEMI! subroutineBlock
;
constructorHeader
: CONSTRUCTOR^ ( identifier | qualifiedMethodIdentifier ) formalParameterList
;
destructorHeader
: DESTRUCTOR^ ( identifier | qualifiedMethodIdentifier ) formalParameterList
;
classType
: CLASS^ (heritage)? (classComponentList | classVisibilitySpecifier ) END!
;
classComponentList
: ( (fieldDefinition)+ )? ( ( (classMethodDefinition | propertyDefinition) )+ )?
;
classMethodDefinition
: ( ( (CLASS!)? (functionHeader | procedureHeader) ) | constructorHeader | destructorHeader ) SEMI! classMethodDirectives
;
classMethodDirectives
: ( directiveVariants SEMI! )? (callModifiers SEMI!)?
;
directiveVariants
: ( VIRTUAL! (ABSTRACT! SEMI!)? )
| OVERRIDE!
| (MESSAGE! (integerConstant | stringConstant))
;
classVisibilitySpecifier
: PRIVATE! | PROTECTED! | PUBLIC! | PUBLISHED!
;
propertyDefinition
: PROPERTY^ identifier (propertyInterface)? propertySpecifiers
;
propertyInterface
: (propertyParameterList)? COLON! typeIdentifier ("index" integerConstant)?
;
propertyParameterList
: LBRACK! parameterDeclaration (SEMI! parameterDeclaration)* RBRACK!
;
propertySpecifiers
: (readSpecifier)? (writeSpecifier)? (defaultSpecifier)?
;
readSpecifier
: "read" fieldOrMethod
;
writeSpecifier
: "write" fieldOrMethod
;
defaultSpecifier
: ( DEFAULT (constant)? )
| "nodefault"
;
fieldOrMethod
: identifier
;
expression
: simpleExpression ( expressionSign simpleExpression )?
;
expressionSign
// : STAR! | LE! | GE! | LTH! | GT! | NOT_EQUAL! | IN! | IS!
: LE! | GE! | LTH! | GT! | NOT_EQUAL! | IN! | IS! | EQUAL!
;
simpleExpression
: term ( ( PLUS! | MINUS! | OR! | XOR! ) term )*
;
term
: factor ( (STAR! | SLASH! | DIV! | MOD! | AND! | SHL! | SHR!) factor )*
;
//TODO: distinguish between identifiers, typecasts and function calls -> semantic predicate
factor
: ( LPAREN! expression RPAREN! )
// | (qualifiedMethodIdentifier2 LBRACK!)=> qualifiedMethodIdentifier2 LBRACK! arrayIndexType ( COMMA! arrayIndexType )* RBRACK!
| identifierOrValueTypecastOrFunctionCall
// | identifier
// | functionCall
| unsignedConstant
| ( NOT! factor )
| ( (PLUS! | MINUS!) factor )
| setConstructor
// | valueTypecast
| addressFactor
| TRUE
| FALSE
| identifier LBRACK! expression ( COMMA! expression )* RBRACK!
;
//FIXME: is this correct?
identifierOrValueTypecastOrFunctionCall
: (identifier LPAREN! expression COMMA!)=> identifier LPAREN! expressions RPAREN!
| (identifier LPAREN! expression RPAREN!)=> identifier LPAREN! expression RPAREN!
// | (qualifiedMethodIdentifier2 LPAREN! expression COMMA!)=> qualifiedMethodIdentifier2 LPAREN! expressions RPAREN!
// | (identifier DOT)=> qualifiedMethodIdentifier2
| identifier
;
/*qualifiedMethodIdentifier2
: identifier DOT identifier
;
*/
//( functionIdentifier | methodDesignator | qualifiedMethodDesignator | variableReference )
functionCall
: identifier (actualParameterList)?
;
actualParameterList
: LPAREN! ( expressions )? RPAREN!
;
expressions
: expression ( COMMA! expression )*
;
setConstructor
: LBRACK! ( setGroup ( COMMA! setGroup )* )? RBRACK!
;
setGroup
: expression ( DOT! DOT! expression )?
;
valueTypecast
: typeIdentifier LPAREN! expression RPAREN!
;
//( variableReference | procedureIdentifier | functionIdentifier | qualifiedMethodIdentifier )
addressFactor
: AT! identifier
;
statement
// : (label COLON!)? (simpleStatement | structuredStatement | asmStatement)
: (label COLON!)? (simpleStatement | structuredStatement)
;
simpleStatement
: assignmentStatement | procedureStatement | gotoStatement | raiseStatement
;
assignmentStatement
: identifierOrArrayIdentifier assignmentOperator expression
;
identifierOrArrayIdentifier
: identifier
// | (qualifiedMethodIdentifier LBRACK!)=> qualifiedMethodIdentifier LBRACK! arrayIndexType ( COMMA! arrayIndexType )* RBRACK!
// | qualifiedMethodIdentifier
| identifier LBRACK! expression ( COMMA! expression )* RBRACK!
;
assignmentOperator
: ASSIGN! | PLUSEQ | MINUSEQ | STAREQ | SLASHQE
;
procedureStatement
: identifier (actualParameterList)?
;
gotoStatement
: GOTO! label
;
structuredStatement
: compoundStatement | repetitiveStatement | conditionalStatement | exceptionStatement | withStatement
;
conditionalStatement
: ifStatement | caseStatement
;
repetitiveStatement
: forStatement | repeatStatement | whileStatement
;
compoundStatement
: BEGIN! END!
| BEGIN! (SEMI!)+ END!
| BEGIN! statement (SEMI! (statement)?)* END!
;
ifStatement
: IF^ expression THEN! statement
(
// CONFLICT: the old "dangling-else" problem...
// ANTLR generates proper code matching
// as soon as possible. Hush warning.
options {
generateAmbigWarnings=false;
}
: ELSE! statement
)?
;
caseStatement
: CASE^ expression OF!
caseListElement ( SEMI! caseListElement )*
( SEMI! ELSE! statement ( SEMI! statement )* )?
END!
;
caseListElement
: constList COLON^ statement
;
constList
: constant ( COMMA! constant )*
{#constList = #([CONSTLIST],#constList);}
;
whileStatement
: WHILE^ expression DO! statement
;
repeatStatement
: REPEAT^ statement ( SEMI! (statement)? )* UNTIL! expression
;
forStatement
: FOR^ identifier ASSIGN! forList DO! statement
;
forList
: initialValue (TO^ | DOWNTO^) finalValue
;
initialValue
: expression
;
finalValue
: expression
;
withStatement
: WITH^ recordVariableList DO! statement
;
recordVariableList
: variable ( COMMA! variable )*
;
/** A variable is an id with a suffix and can look like:
* id
* id[expr,...]
* id.id
* id.id[expr,...]
* id^
* id^.id
* id^.id[expr,...]
* ...
*
* LL has a really hard time with this construct as it's naturally
* left-recursive. We have to turn into a simple loop rather than
* recursive loop, hence, the suffixes. I keep in the same rule
* for easy tree construction.
*/
variable
: ( AT^ identifier // AT is root of identifier; then other op becomes root
| identifier
)
( LBRACK^ expression ( COMMA! expression)* RBRACK!
| LBRACK2^ expression ( COMMA! expression)* RBRACK2!
| DOT^ identifier
| POINTER^
)*
;
/*asmStatement
: ASM^ assemblerCode END! (registerList)?
;
registerList
: LBRACK! stringConstant ( COMMA! stringConstant )*
;
assemblerCode
: (.)*
;
*/
operatorDefinition
: OPERATOR^ ( assignmentOperatorDefinition | arithmeticOperatorDefinition | comparisonOperatorDefinition )
identifier COLON! type SEMI! subroutineBlock
;
assignmentOperatorDefinition
: ASSIGN! LPAREN! valueParameter RPAREN!
;
arithmeticOperatorDefinition
: ( PLUS! | MINUS! | STAR! | SLASH! | (STAR! STAR!) ) LPAREN! formalParameterList RPAREN!
;
comparisonOperatorDefinition
: ( EQUAL! | LE! | GE! | GT! | LTH! ) LPAREN! formalParameterList RPAREN!
;
raiseStatement
: RAISE^ ( functionCall (AT! addressConstant)? )?
;
exceptionStatement
: tryStatement
;
tryStatement
: TRY^ (statements)? exceptOrFinallyPart END!
;
exceptOrFinallyPart
: EXCEPT! (exceptionHandlers)?
| FINALLY! (statements)?
;
statements
: statement ( SEMI! statement )*
;
exceptionHandlers
: statements | exceptionHandler ( SEMI! exceptionHandler )* ( ELSE! statements )?
;
exceptionHandler
: ON! (identifier COLON!)? identifier DO! statement
;
identifierList
: identifier ( COMMA! identifier )*
{#identifierList = #(#[IDLIST],#identifierList);}
;
label
: unsignedInteger
;
unsignedInteger
: NUM_INT
;
integerConstant
: unsignedInteger
|! s:sign n:unsignedInteger { #integerConstant=#(s,n); }
;
stringConstant
: string | constantChr
;
sign
: PLUS | MINUS
;
string
: STRING_LITERAL
;
constantChr
: CHR^ LPAREN! unsignedInteger RPAREN!
;
constant
: unsignedNumber
|! s:sign n:unsignedNumber { #constant=#(s,n); }
| identifier
|! s2:sign id:identifier { #constant=#(s2,id); }
| string
| constantChr
;
unsignedConstant
: unsignedNumber | constantChr | string | NIL!
;
unsignedNumber
: unsignedInteger
| unsignedReal
;
unsignedReal
: NUM_REAL
;
identifier
: IDENT
;
//----------------------------------------------------------------------------
// The Pascal scanner
//----------------------------------------------------------------------------
class PascalLexer extends Lexer;
options {
charVocabulary = '\0'..'\377';
exportVocab = Pascal; // call the vocabulary "Pascal"
testLiterals = false; // don't automatically test for literals
k = 4; // four characters of lookahead
caseSensitive = false;
caseSensitiveLiterals = false;
defaultErrorHandler=false;
}
tokens {
ABSOLUTE = "absolute" ;
ABSTRACT = "abstract" ;
ALIAS = "alias" ;
AND = "and" ;
ARRAY = "array" ;
AS = "as" ;
ASM = "asm" ;
ASSEMBLER = "assembler" ;
BEGIN = "begin" ;
BREAK = "break" ;
BOOLEAN = "boolean" ;
BYTE = "byte" ;
CARDINAL = "cardinal" ;
CASE = "case" ;
CDECL = "cdecl" ;
CHAR = "char" ;
CHR = "chr" ;
CLASS = "class" ;
COMP = "comp" ;
CONST = "const" ;
CONSTRUCTOR = "constructor" ;
CONTINUE = "continue" ;
DEFAULT = "default" ;
DESTRUCTOR = "destructor" ;
DISPOSE = "dispose" ;
DIV = "div" ;
DO = "do" ;
DOUBLE = "double" ;
DOWNTO = "downto" ;
ELSE = "else" ;
END = "end" ;
EXCEPT = "except" ;
EXPORT = "export" ;
EXPORTS = "exports" ;
EXTENDED = "extended" ;
EXTERNAL = "external" ;
EXIT = "exit" ;
FALSE = "false" ;
FILE = "file" ;
FINALLY = "finally" ;
FAR = "far" ;
FOR = "for" ;
FORWARD = "forward" ;
FUNCTION = "function" ;
GOTO = "goto" ;
IF = "if" ;
IN = "in" ;
// INDEX = "index" ;
IS = "is" ;
INHERITED = "inherited" ;
INLINE = "inline" ;
INT64 = "int64" ;
INTEGER = "integer" ;
LABEL = "label" ;
LIBRARY = "library" ;
LONGINT = "longint" ;
MOD = "mod" ;
// NAME = "name" ;
NEAR = "near" ;
NEW = "new" ;
NIL = "nil" ;
NOT = "not" ;
OBJECT = "object" ;
OF = "of" ;
ON = "on" ;
OPERATOR = "operator" ;
OR = "or" ;
OVERRIDE = "override" ;
PACKED = "packed" ;
PASCAL = "pascal" ;
POPSTACK = "popstack" ;
PRIVATE = "private" ;
PROCEDURE = "procedure" ;
PROTECTED = "protected" ;
PROGRAM = "program" ;
PROPERTY = "property" ;
PUBLIC = "public" ;
PUBLISHED = "published" ;
QWORD = "qword" ;
RAISE = "raise" ;
REAL = "real" ;
RECORD = "record" ;
REGISTER = "register" ;
REPEAT = "repeat" ;
SAFECALL = "safecall" ;
SAVEREGISTERS = "saveregisters" ;
SELF = "self" ;
SET = "set" ;
SHORTINT = "shortint" ;
SHR = "shr" ;
SHL = "shl" ;
SINGLE = "single" ;
SMALLINT = "smallint" ;
STDCALL = "stdcall" ;
THEN = "then" ;
TO = "to" ;
TRUE = "true" ;
TRY = "try" ;
TYPE = "type" ;
UNTIL = "until" ;
VAR = "var" ;
VIRTUAL = "virtual" ;
WHILE = "while" ;
WITH = "with" ;
WORD = "word" ;
XOR = "xor" ;
METHOD ;
ADDSUBOR ;
ASSIGNEQUAL ;
SIGN ;
FUNC ;
NODE_NOT_EMIT ;
MYASTVAR ;
LF ;
UNIT = "unit" ;
INTERFACE = "interface" ;
USES = "uses" ;
STRING = "string" ;
IMPLEMENTATION = "implementation" ;
FINALIZATION = "finalization" ;
INITIALIZATION = "initialization" ;
RESOURCESTRING = "resourcestring" ;
//pspsps ???
}
{
private:
ProblemReporter* m_problemReporter;
unsigned int m_numberOfErrors;
public:
void resetErrors() { m_numberOfErrors = 0; }
unsigned int numberOfErrors() const { return m_numberOfErrors; }
void setProblemReporter( ProblemReporter* r ) { m_problemReporter = r; }
virtual void reportError( const ANTLR_USE_NAMESPACE(antlr)RecognitionException& ex ){
m_problemReporter->reportError( ex.getMessage().c_str(),
ex.getFilename().c_str(),
ex.getLine(),
ex.getColumn() );
++m_numberOfErrors;
}
virtual void reportError( const ANTLR_USE_NAMESPACE(std)string& errorMessage ){
m_problemReporter->reportError( errorMessage.c_str(),
getFilename().c_str(),
getLine(), getColumn() );
++m_numberOfErrors;
}
virtual void reportWarning( const ANTLR_USE_NAMESPACE(std)string& warnMessage ){
m_problemReporter->reportWarning( warnMessage.c_str(),
getFilename().c_str(),
getLine(), getColumn() );
}
}
//----------------------------------------------------------------------------
// OPERATORS
//----------------------------------------------------------------------------
PLUS : '+' ;
MINUS : '-' ;
STAR : '*' ;
SLASH : '/' ;
ASSIGN : ":=" ;
COMMA : ',' ;
SEMI : ';' ;
COLON : ':' ;
EQUAL : '=' ;
NOT_EQUAL : "<>" ;
LTH : '<' ;
LE : "<=" ;
GE : ">=" ;
GT : '>' ;
LPAREN : '(' ;
RPAREN : ')' ;
LBRACK : '[' ; // line_tab[line]
LBRACK2 : "(." ; // line_tab(.line.)
RBRACK : ']' ;
RBRACK2 : ".)" ;
POINTER : '^' ;
AT : '@' ;
DOT : '.' ('.' {$setType(DOTDOT);})? ;
LCURLY : "{" ;
RCURLY : "}" ;
PLUSEQ : "+=" ;
MINUSEQ : "-=" ;
STAREQ : "*=" ;
SLASHQE : "/=" ;
// Whitespace -- ignored
WS : ( ' '
| '\t'
| '\f'
// handle newlines
| ( "\r\n" // Evil DOS
| '\r' // Macintosh
| '\n' // Unix (the right way)
)
{ newline(); }
)
{ _ttype = ANTLR_USE_NAMESPACE(antlr)Token::SKIP; }
;
COMMENT_1
: "(*"
( options { generateAmbigWarnings=false; }
: { LA(2) != ')' }? '*'
| '\r' '\n' {newline();}
| '\r' {newline();}
| '\n' {newline();}
| ~('*' | '\n' | '\r')
)*
"*)"
{$setType(ANTLR_USE_NAMESPACE(antlr)Token::SKIP);}
;
COMMENT_2
: '{'
( options {generateAmbigWarnings=false;}
: '\r' '\n' {newline();}
| '\r' {newline();}
| '\n' {newline();}
| ~('}' | '\n' | '\r')
)*
'}'
{$setType(ANTLR_USE_NAMESPACE(antlr)Token::SKIP);}
;
COMMENT_3
: "//" (~'\n')* '\n'
{$setType(ANTLR_USE_NAMESPACE(antlr)Token::SKIP);}
;
// an identifier. Note that testLiterals is set to true! This means
// that after we match the rule, we look in the literals table to see
// if it's a literal or really an identifer
IDENT
options {testLiterals=true;}
: ('a'..'z') ('a'..'z'|'0'..'9'|'_')* //pspsps
;
// string literals
STRING_LITERAL
: '\'' ("\'\'" | ~('\''))* '\'' //pspsps * in stead of + because of e.g. ''
;
/** a numeric literal. Form is (from Wirth)
* digits
* digits . digits
* digits . digits exponent
* digits exponent
*/
NUM_INT
: ('0'..'9')+ // everything starts with a digit sequence
( ( {(LA(2)!='.')&&(LA(2)!=')')}? // force k=2; avoid ".."
//PSPSPS example ARRAY (.1..99.) OF char; // after .. thinks it's a NUM_REAL
'.' {$setType(NUM_REAL);} // dot means we are float
('0'..'9')+ (EXPONENT)?
)?
| EXPONENT {$setType(NUM_REAL);} // 'E' means we are float
)
;
// a couple protected methods to assist in matching floating point numbers
protected
EXPONENT
: ('e') ('+'|'-')? ('0'..'9')+
;
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