Method parse

Bcore/src/main/cpp/Dobby/tests/catch.hpp:5924–5942

  using ParserRefImpl::ParserRefImpl;

  auto parse(std::string const &, TokenStream const &tokens) const -> InternalParseResult override {
    auto validationResult = validate();
    if (!validationResult)
      return InternalParseResult(validationResult);

    auto remainingTokens = tokens;
    auto const &token    = *remainingTokens;
    if (token.type != TokenType::Argument)
      return InternalParseResult::ok(ParseState(ParseResultType::NoMatch, remainingTokens));

    assert(!m_ref->isFlag());
    auto valueRef = static_cast<detail::BoundValueRefBase *>(m_ref.get());

    auto result = valueRef->setValue(remainingTokens->token);
    if (!result)
      return InternalParseResult(result);
    else
      return InternalParseResult::ok(ParseState(ParseResultType::Matched, ++remainingTokens));
  }
};

inline auto normaliseOpt(std::string const &optName) -> std::string {