Getting error when i have tried to update RPGLE Grammar 4.5.3 to 4.7(Antlr )

[Om Ujjawal]

When i have tried to update RPGLE Grammar 4.5.3 to Antlr 4.7 getting below error on line no 1346 inside RpgleLexer.g4. Please see the below line no and error.

Line No - 1346 :-  CS_FieldLength: [+\\- 0-9][+\\- 0-9][+\\- 0-9][+\\- 0-9][+\\- 0-9]  {getCharPositionInLine()==68}?;

error(174): RpgLexer.g4:1346:16: string literals and sets cannot be empty: '\\'..' '

error(174): RpgLexer.g4:1346:26: string literals and sets cannot be empty: '\\'..' '

error(174): RpgLexer.g4:1346:36: string literals and sets cannot be empty: '\\'..' '

error(174): RpgLexer.g4:1346:46: string literals and sets cannot be empty: '\\'..' '

error(174): RpgLexer.g4:1346:56: string literals and sets cannot be empty: '\\'..' '

After fixed this issue [+\\- 0-9] to [+\\ - 0-9] gettting below error or also when i deleted the line 1346 inside the RpgleLexer.g4 getting the same error. please see the below:-

Exception in thread "main" java.lang.RuntimeException: set is empty

        at org.antlr.v4.runtime.misc.IntervalSet.getMaxElement(IntervalSet.java:421)

        at org.antlr.v4.runtime.atn.ATNSerializer.serialize(ATNSerializer.java:169)

        at org.antlr.v4.runtime.atn.ATNSerializer.getSerialized(ATNSerializer.java:601)

        at org.antlr.v4.codegen.model.SerializedATN.<init>(SerializedATN.java:22)

        at org.antlr.v4.codegen.model.Recognizer.<init>(Recognizer.java:64)

        at org.antlr.v4.codegen.model.Lexer.<init>(Lexer.java:27)

        at org.antlr.v4.codegen.OutputModelController.lexer(OutputModelController.java:151)

        at org.antlr.v4.codegen.OutputModelController.buildLexerOutputModel(OutputModelController.java:104)

        at org.antlr.v4.codegen.CodeGenerator.generateLexer(CodeGenerator.java:119)

        at org.antlr.v4.codegen.CodeGenPipeline.process(CodeGenPipeline.java:54)

        at org.antlr.v4.Tool.processNonCombinedGrammar(Tool.java:404)

        at org.antlr.v4.Tool.process(Tool.java:362)

        at org.antlr.v4.Tool.processGrammarsOnCommandLine(Tool.java:321)

        at org.antlr.v4.Tool.main(Tool.java:168)

Please guide me....

[Ivan Kochurkin]

As I understand you should escape minus character:

[+\\\- 0-9]

It recognized as a range operator (like on the digitals range).

понедельник, 27 ноября 2017 г., 10:18:09 UTC+3 пользователь Om Ujjawal написал:

[Om Ujjawal]

Thanks Ivan Kochurkin, 

It's work for me. i have one more problem. getting the same error from below code inside lexer:-

FROM_POSITION: WORD5 [a-zA-Z0-9\+\- ][a-zA-Z0-9 ]{getCharPositionInLine()==32}?;

When i have made the changed above code (FROM_POSITION: WORD5 [a-zA-Z0-9\\+\\\- ][a-zA-Z0-9 ]{getCharPositionInLine()==32}?;) getting below warning.

 warning(180): RpgLexer.g4:824:21: chars '\\' used multiple times in set [a-zA-Z0-9\\+\\\- ]

It is correct, Please guide...

[Ivan Kochurkin]

Just remove one escaped backslash \\

[a-zA-Z0-9\\+\- ]

вторник, 28 ноября 2017 г., 13:56:28 UTC+3 пользователь Om Ujjawal написал:

[Om Ujjawal]

Thanks Ivan Kochurkin for your suggestion, It's working for me.

only one doubt is renaming related to the below code:-

CS_FactorContent: (~[\r\n'\'' :]

{(getCharPositionInLine()>=12 && getCharPositionInLine()<=25)

|| (getCharPositionInLine()>=36 && getCharPositionInLine()<=49)

}?

)+;

CS_ResultContent: (~[\r\n'\'' :]

{(getCharPositionInLine()>=50 && getCharPositionInLine()<=63)}?

)+ -> type(CS_FactorContent);

getting below error :

Exception in thread "main" java.lang.RuntimeException: set is empty

        at org.antlr.v4.runtime.misc.IntervalSet.getMaxElement(IntervalSet.java:421)

        at org.antlr.v4.runtime.atn.ATNSerializer.serialize(ATNSerializer.java:169)

        at org.antlr.v4.runtime.atn.ATNSerializer.getSerialized(ATNSerializer.java:601)

        at org.antlr.v4.codegen.model.SerializedATN.<init>(SerializedATN.java:22)

        at org.antlr.v4.codegen.model.Recognizer.<init>(Recognizer.java:64)

        at org.antlr.v4.codegen.model.Lexer.<init>(Lexer.java:27)

        at org.antlr.v4.codegen.OutputModelController.lexer(OutputModelController.java:151)

        at org.antlr.v4.codegen.OutputModelController.buildLexerOutputModel(OutputModelController.java:104)

        at org.antlr.v4.codegen.CodeGenerator.generateLexer(CodeGenerator.java:119)

        at org.antlr.v4.codegen.CodeGenPipeline.process(CodeGenPipeline.java:54)

        at org.antlr.v4.Tool.processNonCombinedGrammar(Tool.java:404)

        at org.antlr.v4.Tool.process(Tool.java:362)

        at org.antlr.v4.Tool.processGrammarsOnCommandLine(Tool.java:321)

        at org.antlr.v4.Tool.main(Tool.java:168)

when i have made the change inside the code please see below:

CS_FactorContent: (~[\r\n'\\'' :]

{(getCharPositionInLine()>=12 && getCharPositionInLine()<=25)

|| (getCharPositionInLine()>=36 && getCharPositionInLine()<=49)

}?

)+;

CS_ResultContent: (~[\r\n'\\'' :]

{(getCharPositionInLine()>=50 && getCharPositionInLine()<=63)}?

)+ -> type(CS_FactorContent);

getting below warning:-

warning(180): RpgLexer.g4:1147:20: chars '\'' used multiple times in set [\r\n'\\'' :]

warning(180): RpgLexer.g4:1147:20: chars '\'' used multiple times in set [\r\n'\\'' :]

warning(180): RpgLexer.g4:1152:20: chars '\'' used multiple times in set [\r\n'\\'' :]

warning(180): RpgLexer.g4:1152:20: chars '\'' used multiple times in set [\r\n'\\'' :]

Please guide.

[Ivan Kochurkin]

You are using several quotes ' inside one in range:

warning(180): RpgLexer.g4:1147:20: chars '\'' used multiple times in set [\r\n'\\'' :]

понедельник, 27 ноября 2017 г., 10:18:09 UTC+3 пользователь Om Ujjawal написал:

When i have tried to update RPGLE Grammar 4.5.3 to Antlr 4.7 getting below error on line no 1346 inside RpgleLexer.g4. Please see the below line no and error.

[Om Ujjawal]

Thanks Ivan Kochurkin