moar Java/ANTLR grammars: 1.3 parr; 1.4 parr/cortex; 6 jiang.

git-svn-id: https://slps.svn.sourceforge.net/svnroot/slps@969 ab42f6e0-554d-0410-b580-99e487e6eeb2

topics/grammars/java/antlr-java-1.3/Main.java

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+import java.io.*;
+import antlr.collections.AST;
+import antlr.collections.impl.*;
+import antlr.debug.misc.*;
+import antlr.*;
+import java.awt.event.*;
+
+class Main {
+
+	static boolean showTree = false;
+    public static void main(String[] args) {
+		// Use a try/catch block for parser exceptions
+		try {
+			// if we have at least one command-line argument
+			if (args.length > 0 ) {
+				System.err.println("Parsing...");
+
+				// for each directory/file specified on the command line
+				for(int i=0; i< args.length;i++) {
+					if ( args[i].equals("-showtree") ) {
+						showTree = true;
+					}
+					else {
+						doFile(new File(args[i])); // parse it
+					}
+				} }
+			else
+				System.err.println("Usage: java Main [-showtree] "+
+                                   "<directory or file name>");
+		}
+		catch(Exception e) {
+			System.err.println("exception: "+e);
+			e.printStackTrace(System.err);   // so we can get stack trace
+		}
+	}
+
+
+	// This method decides what action to take based on the type of
+	//   file we are looking at
+	public static void doFile(File f)
+							  throws Exception {
+		// If this is a directory, walk each file/dir in that directory
+		if (f.isDirectory()) {
+			String files[] = f.list();
+			for(int i=0; i < files.length; i++)
+				doFile(new File(f, files[i]));
+		}
+
+		// otherwise, if this is a java file, parse it!
+		else if ((f.getName().length()>5) &&
+				f.getName().substring(f.getName().length()-5).equals(".java")) {
+			System.err.println("   "+f.getAbsolutePath());
+			// parseFile(f.getName(), new FileInputStream(f));
+			parseFile(f.getName(), new BufferedReader(new FileReader(f)));
+		}
+	}
+
+	// Here's where we do the real work...
+	public static void parseFile(String f, Reader r)
+								 throws Exception {
+		try {
+			// Create a scanner that reads from the input stream passed to us
+			JavaLexer lexer = new JavaLexer(r);
+			lexer.setFilename(f);
+
+			// Create a parser that reads from the scanner
+			JavaRecognizer parser = new JavaRecognizer(lexer);
+			parser.setFilename(f);
+
+			// start parsing at the compilationUnit rule
+			parser.compilationUnit();
+
+			// do something with the tree
+			doTreeAction(f, parser.getAST(), parser.getTokenNames());
+		}
+		catch (Exception e) {
+			System.err.println("parser exception: "+e);
+			e.printStackTrace();   // so we can get stack trace		
+		}
+	}
+
+	public static void doTreeAction(String f, AST t, String[] tokenNames) {
+		if ( t==null ) return;
+		if ( showTree ) {
+			((CommonAST)t).setVerboseStringConversion(true, tokenNames);
+			ASTFactory factory = new ASTFactory();
+			AST r = factory.create(0,"AST ROOT");
+			r.setFirstChild(t);
+			final ASTFrame frame = new ASTFrame("Java AST", r);
+			frame.setVisible(true);
+			frame.addWindowListener(
+				new WindowAdapter() {
+                   public void windowClosing (WindowEvent e) {
+                       frame.setVisible(false); // hide the Frame
+                       frame.dispose();
+                       System.exit(0);
+                   }
+		        }
+			);
+			// System.out.println(t.toStringList());
+		}
+		JavaTreeParser tparse = new JavaTreeParser();
+		try {
+			tparse.compilationUnit(t);
+			// System.out.println("successful walk of result AST for "+f);
+		}
+		catch (RecognitionException e) {
+			System.err.println(e.getMessage());
+			e.printStackTrace();
+		}
+
+	}
+}
+

topics/grammars/java/antlr-java-1.3/README.txt

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+http://www.antlr.org/grammar/list:
+ ↳  http://www.antlr.org/grammar/java
+
+Java parser and tree parser
+Terence Parr Sun Jan 19, 2003 00:00
+Java: A Java 1.3 grammar written originally by (alphabetically) John Lilley, John Mitchell, Terence Parr, and Scott Stanchfield from the language spec; parses, builds trees, and walks the trees (includes java.tree.g).  Updated to 2.7.2. Last updated 1/19/2003.