Subst api mockup

gistfile1.c++

String String::subst(HashTable<String, String> hashes) const {
  String newStr(*this);
  Array<String> keys(hashes.keys());
  Array<String> values(hashes.values());
  for (size_t i = 0; i < keys.length(); ++i) {
    const String key(keys[i]), value(values[i]);
    //::printf("%s -> %s\n", key.c_str(), value.c_str());
    newStr = newStr.sub(key, value);
  }
  return newStr;
}

  *a = "$this $is $a $test";
  HashTable<String, String> hashes;
  hashes["$this"] = "THIS";
  hashes["$is"] = "IS";
  hashes["$a"] = "A";
  hashes["$test"] = "TEST";
  *b = a->subst(hashes);
  CPPUNIT_ASSERT_STRING_EQUAL("$this $is $a $test", *a);
  CPPUNIT_ASSERT_STRING_EQUAL("THIS IS A TEST", *b);