How to use

getPreprocessor

method

in

org.anarres.cpp.CppReader

private void testCppReader(String in, String out)
          throws Exception {
  System.out.println("Testing " + in + " => " + out);
  StringReader    r = new StringReader(in);
  CppReader        p = new CppReader(r);
  p.getPreprocessor().setSystemIncludePath(
      Collections.singletonList("src/test/resources/input")
        );
  p.getPreprocessor().getFeatures().add(Feature.LINEMARKERS);
  BufferedReader    b = new BufferedReader(p);
  String    line;
  while ((line = b.readLine()) != null) {
    System.out.println(" >> " + line);
  }
}

public static String testCppReader(@Nonnull String in, Feature... f)
    throws Exception {
  System.out.println("Testing " + in);
  StringReader r = new StringReader(in);
  CppReader p = new CppReader(r);
  p.getPreprocessor().setSystemIncludePath(
      Collections.singletonList("src/test/resources")
  );
  p.getPreprocessor().addFeatures(f);
  BufferedReader b = new BufferedReader(p);
  StringBuilder out = new StringBuilder();
  String line;
  while ((line = b.readLine()) != null) {
    System.out.println(" >> " + line);
    out.append(line).append("\n");
  }
  return out.toString();
}

  @Test
  public void testPragma() throws Exception {
    File file = new File("build/resources/test/pragma.c");
    assertTrue(file.exists());

    CharSource source = Files.asCharSource(file, Charsets.UTF_8);
    CppReader r = new CppReader(source.openBufferedStream());
    r.getPreprocessor().setListener(new DefaultPreprocessorListener());
    String output = CharStreams.toString(r);
    r.close();
    LOG.info("Output: " + output);
    // assertTrue(output.contains("absolute-result"));
  }
}