Examples with BailErrorStrategy org.antlr.v4.runtime.BailErrorStrategy used on opensource projects

Example 6 with BailErrorStrategy

use of org.antlr.v4.runtime.BailErrorStrategy in project ballerina by ballerina-lang.

the class SiddhiCompiler method parse.

public static SiddhiApp parse(String source) {
    ANTLRInputStream input = new ANTLRInputStream(source);
    SiddhiQLLexer lexer = new SiddhiQLLexer(input);
    lexer.removeErrorListeners();
    lexer.addErrorListener(SiddhiErrorListener.INSTANCE);
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    SiddhiQLParser parser = new SiddhiQLParser(tokens);
    // parser.setErrorHandler(new BailErrorStrategy());
    parser.removeErrorListeners();
    parser.addErrorListener(SiddhiErrorListener.INSTANCE);
    ParseTree tree = parser.parse();
    SiddhiQLVisitor eval = new SiddhiQLBaseVisitorImpl();
    return (SiddhiApp) eval.visit(tree);
}

Example 7 with BailErrorStrategy

use of org.antlr.v4.runtime.BailErrorStrategy in project graphql-java by graphql-java.

the class Parser method parseDocument.

public Document parseDocument(String input) {
    GraphqlLexer lexer = new GraphqlLexer(CharStreams.fromString(input));
    CommonTokenStream tokens = new CommonTokenStream(lexer);
    GraphqlParser parser = new GraphqlParser(tokens);
    parser.removeErrorListeners();
    parser.getInterpreter().setPredictionMode(PredictionMode.SLL);
    parser.setErrorHandler(new BailErrorStrategy());
    GraphqlParser.DocumentContext document = parser.document();
    GraphqlAntlrToLanguage antlrToLanguage = new GraphqlAntlrToLanguage(tokens);
    antlrToLanguage.visitDocument(document);
    Token stop = document.getStop();
    List<Token> allTokens = tokens.getTokens();
    if (stop != null && allTokens != null && !allTokens.isEmpty()) {
        Token last = allTokens.get(allTokens.size() - 1);
        // 
        // do we have more tokens in the stream than we consumed in the parse?
        // if yes then its invalid.  We make sure its the same channel
        boolean notEOF = last.getType() != Token.EOF;
        boolean lastGreaterThanDocument = last.getTokenIndex() > stop.getTokenIndex();
        boolean sameChannel = last.getChannel() == stop.getChannel();
        if (notEOF && lastGreaterThanDocument && sameChannel) {
            throw new ParseCancellationException("There are more tokens in the query that have not been consumed");
        }
    }
    return antlrToLanguage.getResult();
}

Example 8 with BailErrorStrategy

use of org.antlr.v4.runtime.BailErrorStrategy in project antlr4 by tunnelvisionlabs.

the class ParseTreePatternMatcher method compile.

/**
 * For repeated use of a tree pattern, compile it to a
 * {@link ParseTreePattern} using this method.
 */
public ParseTreePattern compile(String pattern, int patternRuleIndex) {
    List<? extends Token> tokenList = tokenize(pattern);
    ListTokenSource tokenSrc = new ListTokenSource(tokenList);
    CommonTokenStream tokens = new CommonTokenStream(tokenSrc);
    ParserInterpreter parserInterp = new ParserInterpreter(parser.getGrammarFileName(), parser.getVocabulary(), Arrays.asList(parser.getRuleNames()), parser.getATNWithBypassAlts(), tokens);
    ParseTree tree = null;
    try {
        parserInterp.setErrorHandler(new BailErrorStrategy());
        tree = parserInterp.parse(patternRuleIndex);
    // System.out.println("pattern tree = "+tree.toStringTree(parserInterp));
    } catch (ParseCancellationException e) {
        throw (RecognitionException) e.getCause();
    } catch (RecognitionException re) {
        throw re;
    } catch (Exception e) {
        throw new CannotInvokeStartRule(e);
    }
    // Make sure tree pattern compilation checks for a complete parse
    if (tokens.LA(1) != Token.EOF) {
        throw new StartRuleDoesNotConsumeFullPattern();
    }
    return new ParseTreePattern(this, pattern, patternRuleIndex, tree);
}

Example 9 with BailErrorStrategy

use of org.antlr.v4.runtime.BailErrorStrategy in project antlr4 by tunnelvisionlabs.

the class TestPerformance method getParserFactory.

protected ParserFactory getParserFactory(String lexerName, String parserName, String listenerName, final String entryPoint) {
    try {
        ClassLoader loader = new URLClassLoader(new URL[] { new File(tmpdir).toURI().toURL() }, ClassLoader.getSystemClassLoader());
        final Class<? extends Lexer> lexerClass = loader.loadClass(lexerName).asSubclass(Lexer.class);
        final Class<? extends Parser> parserClass = loader.loadClass(parserName).asSubclass(Parser.class);
        final Class<? extends ParseTreeListener> listenerClass = (Class<? extends ParseTreeListener>) loader.loadClass(listenerName).asSubclass(ParseTreeListener.class);
        final Constructor<? extends Lexer> lexerCtor = lexerClass.getConstructor(CharStream.class);
        final Constructor<? extends Parser> parserCtor = parserClass.getConstructor(TokenStream.class);
        // construct initial instances of the lexer and parser to deserialize their ATNs
        TokenSource tokenSource = lexerCtor.newInstance(CharStreams.fromString(""));
        parserCtor.newInstance(new CommonTokenStream(tokenSource));
        if (!REUSE_LEXER_DFA) {
            Field lexerSerializedATNField = lexerClass.getField("_serializedATN");
            String lexerSerializedATN = (String) lexerSerializedATNField.get(null);
            for (int i = 0; i < NUMBER_OF_THREADS; i++) {
                sharedLexerATNs[i] = new ATNDeserializer().deserialize(lexerSerializedATN.toCharArray());
            }
        }
        if (RUN_PARSER && !REUSE_PARSER_DFA) {
            Field parserSerializedATNField = parserClass.getField("_serializedATN");
            String parserSerializedATN = (String) parserSerializedATNField.get(null);
            for (int i = 0; i < NUMBER_OF_THREADS; i++) {
                sharedParserATNs[i] = new ATNDeserializer().deserialize(parserSerializedATN.toCharArray());
            }
        }
        return new ParserFactory() {

            @SuppressWarnings("unused")
            @Override
            public FileParseResult parseFile(CharStream input, int currentPass, int thread) {
                final MurmurHashChecksum checksum = new MurmurHashChecksum();
                final long startTime = System.nanoTime();
                assert thread >= 0 && thread < NUMBER_OF_THREADS;
                try {
                    ParseTreeListener listener = sharedListeners[thread];
                    if (listener == null) {
                        listener = listenerClass.newInstance();
                        sharedListeners[thread] = listener;
                    }
                    Lexer lexer = sharedLexers[thread];
                    if (REUSE_LEXER && lexer != null) {
                        lexer.setInputStream(input);
                    } else {
                        Lexer previousLexer = lexer;
                        lexer = lexerCtor.newInstance(input);
                        sharedLexers[thread] = lexer;
                        ATN atn = (FILE_GRANULARITY || previousLexer == null ? lexer : previousLexer).getATN();
                        if (!REUSE_LEXER_DFA || (!FILE_GRANULARITY && previousLexer == null)) {
                            atn = sharedLexerATNs[thread];
                        }
                        if (!ENABLE_LEXER_DFA) {
                            lexer.setInterpreter(new NonCachingLexerATNSimulator(lexer, atn));
                        } else if (!REUSE_LEXER_DFA || COMPUTE_TRANSITION_STATS) {
                            lexer.setInterpreter(new StatisticsLexerATNSimulator(lexer, atn));
                        }
                    }
                    lexer.removeErrorListeners();
                    lexer.addErrorListener(DescriptiveLexerErrorListener.INSTANCE);
                    lexer.getInterpreter().optimize_tail_calls = OPTIMIZE_TAIL_CALLS;
                    if (ENABLE_LEXER_DFA && !REUSE_LEXER_DFA) {
                        lexer.getInterpreter().atn.clearDFA();
                    }
                    CommonTokenStream tokens = new CommonTokenStream(lexer);
                    tokens.fill();
                    tokenCount.addAndGet(currentPass, tokens.size());
                    if (COMPUTE_CHECKSUM) {
                        for (Token token : tokens.getTokens()) {
                            updateChecksum(checksum, token);
                        }
                    }
                    if (!RUN_PARSER) {
                        return new FileParseResult(input.getSourceName(), checksum.getValue(), null, tokens.size(), startTime, lexer, null);
                    }
                    final long parseStartTime = System.nanoTime();
                    Parser parser = sharedParsers[thread];
                    if (REUSE_PARSER && parser != null) {
                        parser.setInputStream(tokens);
                    } else {
                        Parser previousParser = parser;
                        if (USE_PARSER_INTERPRETER) {
                            Parser referenceParser = parserCtor.newInstance(tokens);
                            parser = new ParserInterpreter(referenceParser.getGrammarFileName(), referenceParser.getVocabulary(), Arrays.asList(referenceParser.getRuleNames()), referenceParser.getATN(), tokens);
                        } else {
                            parser = parserCtor.newInstance(tokens);
                        }
                        ATN atn = (FILE_GRANULARITY || previousParser == null ? parser : previousParser).getATN();
                        if (!REUSE_PARSER_DFA || (!FILE_GRANULARITY && previousParser == null)) {
                            atn = sharedLexerATNs[thread];
                        }
                        if (!ENABLE_PARSER_DFA) {
                            parser.setInterpreter(new NonCachingParserATNSimulator(parser, atn));
                        } else if (!REUSE_PARSER_DFA || COMPUTE_TRANSITION_STATS) {
                            parser.setInterpreter(new StatisticsParserATNSimulator(parser, atn));
                        }
                        sharedParsers[thread] = parser;
                    }
                    parser.removeParseListeners();
                    parser.removeErrorListeners();
                    if (!TWO_STAGE_PARSING) {
                        parser.addErrorListener(DescriptiveErrorListener.INSTANCE);
                        parser.addErrorListener(new SummarizingDiagnosticErrorListener());
                    }
                    if (ENABLE_PARSER_DFA && !REUSE_PARSER_DFA) {
                        parser.getInterpreter().atn.clearDFA();
                    }
                    parser.getInterpreter().setPredictionMode(TWO_STAGE_PARSING ? PredictionMode.SLL : PREDICTION_MODE);
                    parser.getInterpreter().force_global_context = FORCE_GLOBAL_CONTEXT && !TWO_STAGE_PARSING;
                    parser.getInterpreter().always_try_local_context = TRY_LOCAL_CONTEXT_FIRST || TWO_STAGE_PARSING;
                    parser.getInterpreter().enable_global_context_dfa = ENABLE_PARSER_FULL_CONTEXT_DFA;
                    parser.getInterpreter().optimize_ll1 = OPTIMIZE_LL1;
                    parser.getInterpreter().optimize_unique_closure = OPTIMIZE_UNIQUE_CLOSURE;
                    parser.getInterpreter().optimize_tail_calls = OPTIMIZE_TAIL_CALLS;
                    parser.getInterpreter().tail_call_preserves_sll = TAIL_CALL_PRESERVES_SLL;
                    parser.getInterpreter().treat_sllk1_conflict_as_ambiguity = TREAT_SLLK1_CONFLICT_AS_AMBIGUITY;
                    parser.setBuildParseTree(BUILD_PARSE_TREES);
                    if (!BUILD_PARSE_TREES && BLANK_LISTENER) {
                        parser.addParseListener(listener);
                    }
                    if (BAIL_ON_ERROR || TWO_STAGE_PARSING) {
                        parser.setErrorHandler(new BailErrorStrategy());
                    }
                    Method parseMethod = parserClass.getMethod(entryPoint);
                    Object parseResult;
                    try {
                        if (COMPUTE_CHECKSUM && !BUILD_PARSE_TREES) {
                            parser.addParseListener(new ChecksumParseTreeListener(checksum));
                        }
                        if (USE_PARSER_INTERPRETER) {
                            ParserInterpreter parserInterpreter = (ParserInterpreter) parser;
                            parseResult = parserInterpreter.parse(Collections.lastIndexOfSubList(Arrays.asList(parser.getRuleNames()), Collections.singletonList(entryPoint)));
                        } else {
                            parseResult = parseMethod.invoke(parser);
                        }
                    } catch (InvocationTargetException ex) {
                        if (!TWO_STAGE_PARSING) {
                            throw ex;
                        }
                        String sourceName = tokens.getSourceName();
                        sourceName = sourceName != null && !sourceName.isEmpty() ? sourceName + ": " : "";
                        if (REPORT_SECOND_STAGE_RETRY) {
                            System.err.println(sourceName + "Forced to retry with full context.");
                        }
                        if (!(ex.getCause() instanceof ParseCancellationException)) {
                            throw ex;
                        }
                        tokens.seek(0);
                        if (REUSE_PARSER && sharedParsers[thread] != null) {
                            parser.setInputStream(tokens);
                        } else {
                            if (USE_PARSER_INTERPRETER) {
                                Parser referenceParser = parserCtor.newInstance(tokens);
                                parser = new ParserInterpreter(referenceParser.getGrammarFileName(), referenceParser.getVocabulary(), Arrays.asList(referenceParser.getRuleNames()), referenceParser.getATN(), tokens);
                            } else {
                                parser = parserCtor.newInstance(tokens);
                            }
                            sharedParsers[thread] = parser;
                        }
                        parser.removeParseListeners();
                        parser.removeErrorListeners();
                        parser.addErrorListener(DescriptiveErrorListener.INSTANCE);
                        parser.addErrorListener(new SummarizingDiagnosticErrorListener());
                        if (!ENABLE_PARSER_DFA) {
                            parser.setInterpreter(new NonCachingParserATNSimulator(parser, parser.getATN()));
                        } else if (!REUSE_PARSER_DFA) {
                            parser.setInterpreter(new StatisticsParserATNSimulator(parser, sharedParserATNs[thread]));
                        } else if (COMPUTE_TRANSITION_STATS) {
                            parser.setInterpreter(new StatisticsParserATNSimulator(parser, parser.getATN()));
                        }
                        parser.getInterpreter().setPredictionMode(PREDICTION_MODE);
                        parser.getInterpreter().force_global_context = FORCE_GLOBAL_CONTEXT;
                        parser.getInterpreter().always_try_local_context = TRY_LOCAL_CONTEXT_FIRST;
                        parser.getInterpreter().enable_global_context_dfa = ENABLE_PARSER_FULL_CONTEXT_DFA;
                        parser.getInterpreter().optimize_ll1 = OPTIMIZE_LL1;
                        parser.getInterpreter().optimize_unique_closure = OPTIMIZE_UNIQUE_CLOSURE;
                        parser.getInterpreter().optimize_tail_calls = OPTIMIZE_TAIL_CALLS;
                        parser.getInterpreter().tail_call_preserves_sll = TAIL_CALL_PRESERVES_SLL;
                        parser.getInterpreter().treat_sllk1_conflict_as_ambiguity = TREAT_SLLK1_CONFLICT_AS_AMBIGUITY;
                        parser.setBuildParseTree(BUILD_PARSE_TREES);
                        if (COMPUTE_CHECKSUM && !BUILD_PARSE_TREES) {
                            parser.addParseListener(new ChecksumParseTreeListener(checksum));
                        }
                        if (!BUILD_PARSE_TREES && BLANK_LISTENER) {
                            parser.addParseListener(listener);
                        }
                        if (BAIL_ON_ERROR) {
                            parser.setErrorHandler(new BailErrorStrategy());
                        }
                        parseResult = parseMethod.invoke(parser);
                    }
                    assertThat(parseResult, instanceOf(ParseTree.class));
                    if (COMPUTE_CHECKSUM && BUILD_PARSE_TREES) {
                        ParseTreeWalker.DEFAULT.walk(new ChecksumParseTreeListener(checksum), (ParseTree) parseResult);
                    }
                    if (BUILD_PARSE_TREES && BLANK_LISTENER) {
                        ParseTreeWalker.DEFAULT.walk(listener, (ParserRuleContext) parseResult);
                    }
                    return new FileParseResult(input.getSourceName(), checksum.getValue(), (ParseTree) parseResult, tokens.size(), TIME_PARSE_ONLY ? parseStartTime : startTime, lexer, parser);
                } catch (Exception e) {
                    if (!REPORT_SYNTAX_ERRORS && e instanceof ParseCancellationException) {
                        return new FileParseResult("unknown", checksum.getValue(), null, 0, startTime, null, null);
                    }
                    e.printStackTrace(System.out);
                    throw new IllegalStateException(e);
                }
            }
        };
    } catch (Exception e) {
        e.printStackTrace(System.out);
        Assert.fail(e.getMessage());
        throw new IllegalStateException(e);
    }
}

Example 10 with BailErrorStrategy

use of org.antlr.v4.runtime.BailErrorStrategy in project Alpha by alpha-asp.

the class ProgramParserImpl method parse.

public ASPCore2Program parse(CharStream stream, Map<String, PredicateInterpretation> externals) {
    // @formatter:off
    /*
		 * // In order to require less memory: use unbuffered streams and avoid constructing a full parse tree. 
		 * ASPCore2Lexer lexer = new ASPCore2Lexer(new UnbufferedCharStream(is)); 
		 * lexer.setTokenFactory(new CommonTokenFactory(true)); 
		 * final ASPCore2Parser parser = new ASPCore2Parser(new UnbufferedTokenStream<>(lexer)); 
		 * parser.setBuildParseTree(false);
		 */
    // @formatter:on
    CommonTokenStream tokens = new CommonTokenStream(new ASPCore2Lexer(stream));
    final ASPCore2Parser parser = new ASPCore2Parser(tokens);
    // Try SLL parsing mode (faster but may terminate incorrectly).
    parser.getInterpreter().setPredictionMode(PredictionMode.SLL);
    parser.removeErrorListeners();
    parser.setErrorHandler(new BailErrorStrategy());
    final CustomErrorListener errorListener = new CustomErrorListener(stream.getSourceName());
    ASPCore2Parser.ProgramContext programContext;
    try {
        // Parse program
        programContext = parser.program();
    } catch (ParseCancellationException e) {
        // retry with LL parser and DefaultErrorStrategy printing errors to console.
        if (e.getCause() instanceof RecognitionException) {
            tokens.seek(0);
            parser.addErrorListener(errorListener);
            parser.setErrorHandler(new DefaultErrorStrategy());
            parser.getInterpreter().setPredictionMode(PredictionMode.LL);
            // Re-run parse.
            programContext = parser.program();
        } else {
            throw e;
        }
    }
    // is attempted) and the user will only see the first error encountered.
    if (errorListener.getRecognitionException() != null) {
        throw errorListener.getRecognitionException();
    }
    // Abort parsing if there were some (recoverable) syntax errors.
    if (parser.getNumberOfSyntaxErrors() != 0) {
        throw new ParseCancellationException();
    }
    // The union of this parser's preloaded externals and the (program-specific) externals passed to the parse method
    Map<String, PredicateInterpretation> knownExternals;
    if (externals != null && !externals.isEmpty()) {
        knownExternals = new HashMap<>(preloadedExternals);
        knownExternals.putAll(externals);
    } else {
        knownExternals = preloadedExternals;
    }
    // Construct internal program representation.
    ParseTreeVisitor visitor = new ParseTreeVisitor(knownExternals);
    return visitor.translate(programContext);
}