Function parse

src/common/values.cpp:676–759

namespace values {

Try<Value> parse(const string& text)
{
  Value value;

  // Remove all spaces.
  string temp = strings::replace(text, " ", "");

  if (temp.length() == 0) {
    return Error("Expecting non-empty string");
  }

  // TODO(ynie): Find a better way to check brackets.
  if (!strings::checkBracketsMatching(temp, '{', '}') ||
      !strings::checkBracketsMatching(temp, '[', ']') ||
      !strings::checkBracketsMatching(temp, '(', ')')) {
    return Error("Mismatched brackets");
  }

  size_t index = temp.find('[');
  if (index == 0) {
    // This is a Value::Ranges.
    value.set_type(Value::RANGES);
    Value::Ranges* ranges = value.mutable_ranges();
    const vector<string> tokens = strings::tokenize(temp, "[]-,\n");
    if (tokens.size() % 2 != 0) {
      return Error("Expecting one or more \"ranges\"");
    } else {
      for (size_t i = 0; i < tokens.size(); i += 2) {
        Value::Range* range = ranges->add_range();

        Try<uint64_t> begin = numify<uint64_t>(tokens[i]);
        Try<uint64_t> end = numify<uint64_t>(tokens[i + 1]);
        if (begin.isError() || end.isError()) {
          return Error(
              "Expecting non-negative integers in '" + tokens[i] + "'");
        }

        range->set_begin(begin.get());
        range->set_end(end.get());
      }

      coalesce(ranges);

      return value;
    }
  } else if (index == string::npos) {
    size_t index = temp.find('{');
    if (index == 0) {
      // This is a set.
      value.set_type(Value::SET);
      Value::Set* set = value.mutable_set();
      const vector<string> tokens = strings::tokenize(temp, "{},\n");
      for (size_t i = 0; i < tokens.size(); i++) {
        set->add_item(tokens[i]);
      }
      return value;
    } else if (index == string::npos) {
      Try<double> value_ = numify<double>(temp);