ParsingUtils.java 文件源码

/** Same as loadGrammar(fileName) except import vocab from existing lexer */
//  public static Grammar loadGrammar(Tool tool, String fileName, LexerGrammar lexerGrammar) {
//      GrammarRootAST grammarRootAST = parseGrammar(fileName);
//      if ( grammarRootAST==null ) return null;
//      final Grammar g = tool.createGrammar(grammarRootAST);
//      g.fileName = fileName;
//      if ( lexerGrammar!=null ) {
//            g.importVocab(lexerGrammar);
//        }
//      tool.process(g, false);
//      return g;
//  }

    public static Tree findOverriddenDecisionRoot(Tree ctx) {
        return Trees.findNodeSuchThat(ctx, new Predicate<Tree>() {
            @Override
            public boolean test(Tree t) {
                return t instanceof PreviewInterpreterRuleContext ?
                    ((PreviewInterpreterRuleContext) t).isDecisionOverrideRoot() :
                    false;
            }
        });
    }