I am having trouble translating an EBNF grammar to an Antlr4 grammar












2















I have the following EBNF grammar:



StringConstructor      ::=      "``[" StringConstructorContent "]``"
StringConstructorContent ::= StringConstructorChars (StringConstructorInterpolation StringConstructorChars)*
StringConstructorChars ::= (Char* - (Char* ('`{' | ']``') Char*))
StringConstructorInterpolation ::= "`{" Expr? "}`"
Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]


And am trying the following in Antlr4 at xqDoc GitHub repository:



XQueryParser.g4



stringConstructor: '`' '`' '[' stringConstructorContent ']' '`' '`' ;

stringConstructorContent: stringConstructorChars (stringConstructorInterpolation stringConstructorChars)* ;

stringConstructorChars: ( CHAR* ~ ( CHAR* (('`' '{') | (']' '`' '`')) CHAR* ) ) ;

stringConstructorInterpolation: '`' '{' expr '}' '`' ;


XQueryLexer.g4



CHAR:   ( 't' | 'n' | 'r' | 'u0020'..'u0039' | 'u003B'..'uD7FF' | 'uE000'..'uFFFD' ) ;


It is for parsing the following:



for $s in ("one", "two", "red", "blue")
return ``[`{$s}` fish]``


and evaluates to the sequence ("one fish", "two fish", "red fish", "blue fish").



I am getting the following errors:



error(50): :494:38: syntax error: missing RPAREN at '*' while looking for rule element
error(50): :494:70: syntax error: extraneous input ')' expecting SEMI while matching a rule


Does anyone have a suggestion to fix this? I have commented out that section of the grammar so that it compiles.










share|improve this question























  • Are those errors referring to line 494 at columns 38 and 70? If so, which line in the code you provided is line 494 in your file?

    – Tomer Aberbach
    Nov 29 '18 at 18:33











  • line 494 is the stringConstructorChars in the XQueryParser.g4

    – Loren Cahlander
    Dec 19 '18 at 10:00
















2















I have the following EBNF grammar:



StringConstructor      ::=      "``[" StringConstructorContent "]``"
StringConstructorContent ::= StringConstructorChars (StringConstructorInterpolation StringConstructorChars)*
StringConstructorChars ::= (Char* - (Char* ('`{' | ']``') Char*))
StringConstructorInterpolation ::= "`{" Expr? "}`"
Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]


And am trying the following in Antlr4 at xqDoc GitHub repository:



XQueryParser.g4



stringConstructor: '`' '`' '[' stringConstructorContent ']' '`' '`' ;

stringConstructorContent: stringConstructorChars (stringConstructorInterpolation stringConstructorChars)* ;

stringConstructorChars: ( CHAR* ~ ( CHAR* (('`' '{') | (']' '`' '`')) CHAR* ) ) ;

stringConstructorInterpolation: '`' '{' expr '}' '`' ;


XQueryLexer.g4



CHAR:   ( 't' | 'n' | 'r' | 'u0020'..'u0039' | 'u003B'..'uD7FF' | 'uE000'..'uFFFD' ) ;


It is for parsing the following:



for $s in ("one", "two", "red", "blue")
return ``[`{$s}` fish]``


and evaluates to the sequence ("one fish", "two fish", "red fish", "blue fish").



I am getting the following errors:



error(50): :494:38: syntax error: missing RPAREN at '*' while looking for rule element
error(50): :494:70: syntax error: extraneous input ')' expecting SEMI while matching a rule


Does anyone have a suggestion to fix this? I have commented out that section of the grammar so that it compiles.










share|improve this question























  • Are those errors referring to line 494 at columns 38 and 70? If so, which line in the code you provided is line 494 in your file?

    – Tomer Aberbach
    Nov 29 '18 at 18:33











  • line 494 is the stringConstructorChars in the XQueryParser.g4

    – Loren Cahlander
    Dec 19 '18 at 10:00














2












2








2








I have the following EBNF grammar:



StringConstructor      ::=      "``[" StringConstructorContent "]``"
StringConstructorContent ::= StringConstructorChars (StringConstructorInterpolation StringConstructorChars)*
StringConstructorChars ::= (Char* - (Char* ('`{' | ']``') Char*))
StringConstructorInterpolation ::= "`{" Expr? "}`"
Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]


And am trying the following in Antlr4 at xqDoc GitHub repository:



XQueryParser.g4



stringConstructor: '`' '`' '[' stringConstructorContent ']' '`' '`' ;

stringConstructorContent: stringConstructorChars (stringConstructorInterpolation stringConstructorChars)* ;

stringConstructorChars: ( CHAR* ~ ( CHAR* (('`' '{') | (']' '`' '`')) CHAR* ) ) ;

stringConstructorInterpolation: '`' '{' expr '}' '`' ;


XQueryLexer.g4



CHAR:   ( 't' | 'n' | 'r' | 'u0020'..'u0039' | 'u003B'..'uD7FF' | 'uE000'..'uFFFD' ) ;


It is for parsing the following:



for $s in ("one", "two", "red", "blue")
return ``[`{$s}` fish]``


and evaluates to the sequence ("one fish", "two fish", "red fish", "blue fish").



I am getting the following errors:



error(50): :494:38: syntax error: missing RPAREN at '*' while looking for rule element
error(50): :494:70: syntax error: extraneous input ')' expecting SEMI while matching a rule


Does anyone have a suggestion to fix this? I have commented out that section of the grammar so that it compiles.










share|improve this question














I have the following EBNF grammar:



StringConstructor      ::=      "``[" StringConstructorContent "]``"
StringConstructorContent ::= StringConstructorChars (StringConstructorInterpolation StringConstructorChars)*
StringConstructorChars ::= (Char* - (Char* ('`{' | ']``') Char*))
StringConstructorInterpolation ::= "`{" Expr? "}`"
Char ::= #x9 | #xA | #xD | [#x20-#xD7FF] | [#xE000-#xFFFD] | [#x10000-#x10FFFF]


And am trying the following in Antlr4 at xqDoc GitHub repository:



XQueryParser.g4



stringConstructor: '`' '`' '[' stringConstructorContent ']' '`' '`' ;

stringConstructorContent: stringConstructorChars (stringConstructorInterpolation stringConstructorChars)* ;

stringConstructorChars: ( CHAR* ~ ( CHAR* (('`' '{') | (']' '`' '`')) CHAR* ) ) ;

stringConstructorInterpolation: '`' '{' expr '}' '`' ;


XQueryLexer.g4



CHAR:   ( 't' | 'n' | 'r' | 'u0020'..'u0039' | 'u003B'..'uD7FF' | 'uE000'..'uFFFD' ) ;


It is for parsing the following:



for $s in ("one", "two", "red", "blue")
return ``[`{$s}` fish]``


and evaluates to the sequence ("one fish", "two fish", "red fish", "blue fish").



I am getting the following errors:



error(50): :494:38: syntax error: missing RPAREN at '*' while looking for rule element
error(50): :494:70: syntax error: extraneous input ')' expecting SEMI while matching a rule


Does anyone have a suggestion to fix this? I have commented out that section of the grammar so that it compiles.







xquery antlr antlr4






share|improve this question













share|improve this question











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share|improve this question










asked Nov 24 '18 at 20:22









Loren CahlanderLoren Cahlander

551315




551315













  • Are those errors referring to line 494 at columns 38 and 70? If so, which line in the code you provided is line 494 in your file?

    – Tomer Aberbach
    Nov 29 '18 at 18:33











  • line 494 is the stringConstructorChars in the XQueryParser.g4

    – Loren Cahlander
    Dec 19 '18 at 10:00



















  • Are those errors referring to line 494 at columns 38 and 70? If so, which line in the code you provided is line 494 in your file?

    – Tomer Aberbach
    Nov 29 '18 at 18:33











  • line 494 is the stringConstructorChars in the XQueryParser.g4

    – Loren Cahlander
    Dec 19 '18 at 10:00

















Are those errors referring to line 494 at columns 38 and 70? If so, which line in the code you provided is line 494 in your file?

– Tomer Aberbach
Nov 29 '18 at 18:33





Are those errors referring to line 494 at columns 38 and 70? If so, which line in the code you provided is line 494 in your file?

– Tomer Aberbach
Nov 29 '18 at 18:33













line 494 is the stringConstructorChars in the XQueryParser.g4

– Loren Cahlander
Dec 19 '18 at 10:00





line 494 is the stringConstructorChars in the XQueryParser.g4

– Loren Cahlander
Dec 19 '18 at 10:00












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