gistfile1.java

		ParserBean host;
		try (InputStream is = new FileInputStream(hostGrammar)) {
			host = new CupSkinParser().parse(new InputStreamReader(is), hostGrammar.getName());
		} catch (Exception e) {
			throw new BuildException(e);
		}

		ParserBean extension;
		try (InputStream is = new FileInputStream(extensionGrammar)) {
			ArrayList<Pair<String,Reader>> files = new ArrayList<>();
			files.add(new Pair<String, Reader>(extensionGrammar.getName(), new InputStreamReader(is)));
			XMLSkinParser xmlSkinParser = new XMLSkinParser(files,
					new CompilerLogger(new PrintCompilerLogHandler(new PrintStream(new OutputStream() {
						public void write(int b) {
							//Nothing - suppress all messages
						}
					}))));
			xmlSkinParser.parse();
			Field parserField = xmlSkinParser.getClass().getDeclaredField("currentParser");
			parserField.setAccessible(true);
			extension = (ParserBean)parserField.get(xmlSkinParser);
		} catch (Exception e) {
			throw new BuildException(e);
		}

		try {
			CopperElementName grammarName = CopperElementName.newName("_" + hostGrammarName);
			((ExtendedParserBean)extension).setHostGrammar(host.getGrammar(grammarName));
			Field grammarField = extension.getClass().getSuperclass().getDeclaredField("grammars");
			grammarField.setAccessible(true);
			Hashtable<CopperElementName,Grammar> grammars =
					(Hashtable<CopperElementName, Grammar>) grammarField.get(extension);
			grammars.put(grammarName,host.getGrammar(grammarName));
		} catch (Exception e) {
			throw new BuildException(e);
		}

		try {
			CompilerLogger logger = new CompilerLogger(new PrintCompilerLogHandler(System.out));
			ParserSpecProcessor.normalizeParser(extension, logger);
		} catch (CopperException e) {
			throw new BuildException(e);
		}
		ParserCompilerParameters pcp = new ParserCompilerParameters();
		ParserCompiler.compile(extension, pcp);