Java Code Examples for org.antlr.v4.tool.Grammar#getRule()
The following examples show how to use
org.antlr.v4.tool.Grammar#getRule() .
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Example 1
Source File: SymbolChecks.java From codebuff with BSD 2-Clause "Simplified" License | 6 votes |
public void checkRuleArgs(Grammar g, List<GrammarAST> rulerefs) { if ( rulerefs==null ) return; for (GrammarAST ref : rulerefs) { String ruleName = ref.getText(); Rule r = g.getRule(ruleName); GrammarAST arg = (GrammarAST)ref.getFirstChildWithType(ANTLRParser.ARG_ACTION); if ( arg!=null && (r==null || r.args==null) ) { errMgr.grammarError(ErrorType.RULE_HAS_NO_ARGS, g.fileName, ref.token, ruleName); } else if ( arg==null && (r!=null&&r.args!=null) ) { errMgr.grammarError(ErrorType.MISSING_RULE_ARGS, g.fileName, ref.token, ruleName); } } }
Example 2
Source File: SymbolChecks.java From codebuff with BSD 2-Clause "Simplified" License | 6 votes |
public void checkForQualifiedRuleIssues(Grammar g, List<GrammarAST> qualifiedRuleRefs) { for (GrammarAST dot : qualifiedRuleRefs) { GrammarAST grammar = (GrammarAST)dot.getChild(0); GrammarAST rule = (GrammarAST)dot.getChild(1); g.tool.log("semantics", grammar.getText()+"."+rule.getText()); Grammar delegate = g.getImportedGrammar(grammar.getText()); if ( delegate==null ) { errMgr.grammarError(ErrorType.NO_SUCH_GRAMMAR_SCOPE, g.fileName, grammar.token, grammar.getText(), rule.getText()); } else { if ( g.getRule(grammar.getText(), rule.getText())==null ) { errMgr.grammarError(ErrorType.NO_SUCH_RULE_IN_SCOPE, g.fileName, rule.token, grammar.getText(), rule.getText()); } } } }
Example 3
Source File: ProfilerPanel.java From intellij-plugin-v4 with BSD 3-Clause "New" or "Revised" License | 6 votes |
public static String getSemanticContextDisplayString(PredicateEvalInfo pred, PreviewState previewState, SemanticContext semctx, int alt, boolean result) { Grammar g = previewState.g; String semanticContextDisplayString = g.getSemanticContextDisplayString(semctx); if ( semctx instanceof SemanticContext.PrecedencePredicate ) { int ruleIndex = previewState.parsingResult.parser.getATN().decisionToState.get(pred.decision).ruleIndex; Rule rule = g.getRule(ruleIndex); int precedence = ((SemanticContext.PrecedencePredicate) semctx).precedence; // precedence = n - originalAlt + 1, So: int originalAlt = rule.getOriginalNumberOfAlts()-precedence+1; alt = originalAlt; } return semanticContextDisplayString+" => alt "+alt+" is "+result; }
Example 4
Source File: ParsingUtils.java From intellij-plugin-v4 with BSD 3-Clause "New" or "Revised" License | 4 votes |
public static ParsingResult parseText(Grammar g, LexerGrammar lg, String startRuleName, final VirtualFile grammarFile, SyntaxErrorListener syntaxErrorListener, TokenStream tokens, int startIndex) { if ( g==null || lg==null ) { ANTLRv4PluginController.LOG.info("parseText can't parse: missing lexer or parser no Grammar object for " + (grammarFile != null ? grammarFile.getName() : "<unknown file>")); return null; } String grammarFileName = g.fileName; if (!new File(grammarFileName).exists()) { ANTLRv4PluginController.LOG.info("parseText grammar doesn't exist "+grammarFileName); return null; } if ( g==BAD_PARSER_GRAMMAR || lg==BAD_LEXER_GRAMMAR ) { return null; } tokens.seek(startIndex); PreviewParser parser = new PreviewParser(g, tokens); parser.getInterpreter().setPredictionMode(PredictionMode.LL_EXACT_AMBIG_DETECTION); parser.setProfile(true); parser.removeErrorListeners(); parser.addErrorListener(syntaxErrorListener); Rule start = g.getRule(startRuleName); if ( start==null ) { return null; // can't find start rule } // System.out.println("parse test ----------------------------"); ParseTree t = parser.parse(start.index); if ( t!=null ) { return new ParsingResult(parser, t, syntaxErrorListener); } return null; }