I have a large grammar written for DParser format and using the Python binding. When I parse a code using this grammar, I get the following exception but with different symbols depending on what code I pass to it. But the ambiguous symbols are always the same non_terminal. How do I find out what the ambiguity is?
Traceback (most recent call last):
File "parser.py", line 2030, in ambiguity
raise dparser.AmbiguityException("\n\nUnresolved ambiguity! Symbols:\n " + '\n'.join([node.symbol for node in nodes]))
dparser.AmbiguityException:
Unresolved ambiguity! Symbols:
non_terminal
non_terminal
Any hints or ideas would be appreciated.
Related
If I create a new F# file 'Test.fsx' in VSCode with the line
#I __SOURCE_DIRECTORY__
attempting to run the code in FSI generates the error
Test.fsx(2,4): error FS0010: Unexpected compiler generated literal in interaction. Expected incomplete structured construct at or before this point, ';', ';;' or other token.
Any idea what might be going wrong?
It is a known issue in VS2019, which has been fixed in VS2022.
https://github.com/dotnet/fsharp/issues/13467
You may replace the code with
#I "."
I made a small change in my server code not related to formatting numbers and now the dart library number_format.dart won't compile giving me 12 errors and two warnings. number_format is in intl as noted in the comments and the first error is at line 106. Some or most of the other errors appear to cascade from a first error.
Does anyone know how I may resolve this? I presume I need to edit something in my yaml file.
EDIT
If I choose Tools-> Pub Upgrade then I get the pre-build Problems below This weekend I could choose Tools->Pub Build - Debug but at the moment this does not work. Deleting .pub and following Günter Zöchbauer's suggestion allowed me to do a build Sunday - I hope is still does.
Pre-build Problems output:
Errors:
Line 106: Expected an identifier
Line 106: Expected to find ':'
Line 106: Unexpected token '?'
Line 131: Unexpected token '?'
Line 132: Expected an identifier
Line 132: Expected to find ':'
Line 233: Expected an identifier
Line 233: Expected to find ':'
Line 233: Unexpected token '?'
Line 545: Expected an identifier
Line 545: Expected to find ':'
Line 545: Unexpected token '?'
Warnings:
Line 106: Conditions must have a static type of 'bool'
Line 545: Conditions must have a static type of 'bool'
Hint:
Line 425: When compiled to JS, this test might return true when the left hand side is an int
Thanks
I want to take the .g files from Apache Hive and build a parser (targeting JavaScript) -- initially, as just a way to validate user-input Hive queries. The files I'm using come from apache-hive-1.0.0-src\ql\src\java\org\apache\hadoop\hive\ql\parse from the Hive tgz: HiveLexer.g, HiveParser.g, FromClauseParser.g, IdentifiersParser.g, SelectClauseParser.g.
I see no indication within the grammar files which version of ANTLR to use, so I've tried running antlr (from apt-get pccts), antlr3 and antlr4. they all throw errors of some sort, so I have no clue which one to run or if I can (or need to) convert the .g files between versions.
The errors I'm getting are as follows:
antlr -Dlanguage=JavaScript HiveParser.g (looks like it doesn't support JS anyway):
warning: invalid option: '-Dlanguage=JavaScript'
HiveParser.g, line 17: syntax error at "grammar" missing { QuotedTerm PassAction ! \< \> : }
HiveParser.g, line 17: syntax error at "HiveParser" missing { QuotedTerm PassAction ! \< \> : }
HiveParser.g, line 17: syntax error at ";" missing Eof
HiveParser.g, line 28: lexical error: invalid token (text was ',')
antlr3 -Dlanguage=JavaScript HiveParser.g:
error(10): internal error: Exception FromClauseParser.g:302:85: unexpected char: '-'#org.antlr.grammar.v2.ANTLRLexer.nextToken(ANTLRLexer.java:347): unexpected stream error from parsing FromClauseParser.g
error(150): grammar file FromClauseParser.g has no rules
error(100): FromClauseParser.g:0:0: syntax error: assign.types: <AST>:299:68: unexpected AST node: ->
error(100): FromClauseParser.g:0:0: syntax error: define: <AST>:299:68: unexpected AST node: ->
error(106): SelectClauseParser.g:151:18: reference to undefined rule: tableAllColumns
antlr4 -Dlanguage=JavaScript HiveParser.g:
warning(202): HiveParser.g:30:0: tokens {A; B;} syntax is now tokens {A, B} in ANTLR 4
error(50): HiveParser.g:636:34: syntax error: '->' came as a complete surprise to me while looking for rule element
error(50): HiveParser.g:636:37: syntax error: '^' came as a complete surprise to me
error(50): HiveParser.g:638:50: syntax error: '->' came as a complete surprise to me while looking for rule element
error(50): HiveParser.g:638:53: syntax error: '^' came as a complete surprise to me
The antlr3 error referencing #org.antlr.grammar.v2.ANTLRLexer.nextToken seems suspect. Is it using the v2 lexer instead of v3? If so, maybe v3 is what I should target, but it's somehow not hitting it?
Or is this not an issue with versioning and instead with invocation? Or is Hive built in a way that provides additional files needed?
According to Hive source code, they use ANTLR 3.4. But before you start remove the last string from FromClauseParser.g
//------------------------------------------------------------------------
I have a Lua file that I decompiled using unluac. When I try to recompile the files without any changes I get the following error:
lua: main.lua:647: 'do' expected near '['
I really do not know the problem here, as the while do statement follows the correct format.
The error is on line 647 as stated above.
Source is here:
Full Pastebin Source
Expressions like while {}[1] do and if {}[1].parentFolderName then are invalid because of {}[1] reference. It needs to be ({})[1]. It's probably a result of some sort of automated processing, but you should be able to fix it manually.
I am trying to work with 1 GB XML and DTD file with Erlsom.
The problem is that parse_sax throws an exception becuase it cannot work with DTD file.
Basically i don't need this information so my question is how i tell the
sax_parser to just ignore this?
or even to use try and catch and when the error got catches then to skip this place on the file and continue from there.
This the exception:
** exception throw: {error,"Malformed: unknown reference: uuml"}
in function erlsom_sax_latin1:nowFinalyTranslate/3 (src/erlsom_sax_latin1.erl, line 1051)
in call from erlsom_sax_latin1:translateReferenceNonCharacter/4 (src/erlsom_sax_latin1.erl, line 1024)
in call from erlsom_sax_latin1:parseTextNoIgnore/3 (src/erlsom_sax_latin1.erl, line 922)
in call from erlsom_sax_latin1:parseContent/2 (src/erlsom_sax_latin1.erl, line 898)
in call from erlsom_sax_latin1:parse/2 (src/erlsom_sax_latin1.erl, line 172)
in call from mapReduce:run/0 (/home/alon/workspace/mapReduce/src/mapReduce.erl, line 26)(mapReduce#alon-Vostro-3300)2>
The problem is with "uuml" because in the XML file its apear with ü
Thanks for your help.
Hit the same error and found this in the ErlSom docs under limitations of the sax parser:
It doesn’t support entities, apart from the predefined ones (< etc.) and character references (&#nnn; and &#xhhh;).