bool ribi::Chess::Move::ParseIsEnPassant(const std::string& s)
{
static const boost::xpressive::sregex r {
boost::xpressive::sregex::compile("([a-h][4-5])x[a-h][3-6]e.p.(\\+|\\#)?")
};
if (!boost::xpressive::regex_match(s,r)) return false;
const boost::shared_ptr<Chess::Square> from = ParseFrom(s);
const boost::shared_ptr<Chess::Square> to = ParseTo(s);
assert(from);
assert(to);
if (std::abs(from->GetFile().ToInt() - to->GetFile().ToInt()) != 1) return false;
if (std::abs(from->GetRank().ToInt() - to->GetRank().ToInt()) != 1) return false;
if (from->GetRank() == Chess::Rank("5") && to->GetRank() == Chess::Rank("6")) return true;
if (from->GetRank() == Chess::Rank("4") && to->GetRank() == Chess::Rank("3")) return true;
return false;
}
ribi::Chess::Move::Move(const std::string& s)
: m_from(ParseFrom(s)),
m_is_capture(ParseIsCapture(s)),
m_is_castling(ParseIsCastling(s)),
m_is_check(ParseIsCheck(s)),
m_is_checkmate(ParseIsCheckmate(s)),
m_is_en_passant(ParseIsEnPassant(s)),
m_is_promotion(ParseIsPromotion(s)),
m_piece(ParsePiece(s)),
m_piece_promotion(ParsePiecePromotion(s)),
m_score(ParseScore(s)),
m_str(s),
m_to(ParseTo(s))
{
#ifndef NDEBUG
Test();
#endif
if (s.empty()) throw std::logic_error("std::string to parse is empty");
if (!m_to && !m_is_castling && (!m_score))
{
const std::string error = "ribi::Chess::Move::Move exception: m_to not initialized for non-castling non-score move " + s;
throw std::logic_error(error.c_str());
}
#ifndef RIBI_CHESS_ALLOW_SHORT_NOTATION
if (m_to && !m_from)
{
const std::string error = "ribi::Chess::Move::Move exception: if there is a 'to', also supply a 'from' in move " + s;
throw std::logic_error(error.c_str());
}
#endif // RIBI_CHESS_ALLOW_SHORT_NOTATION
if (!m_piece && !m_is_castling && !m_score)
{
const std::string error = "ribi::Chess::Move::Move exception: m_piece not initialized for non-castling non-score move " + s;
throw std::logic_error(error.c_str());
}
if (m_is_en_passant && !m_is_capture) throw std::logic_error("ribi::Chess::Move::Move exception: every en passant capture is a capture");
if (boost::xpressive::regex_search(s,boost::xpressive::sregex::compile("(e\\.p\\.)")) && !m_is_en_passant)
{
const std::string error = "ribi::Chess::Move::Move exception: move is an invalid en passant move: " + s;
throw std::logic_error(error.c_str());
}
if (m_piece)
{
if (m_is_castling)
{
throw std::logic_error("ribi::Chess::Move::Move exception: m_piece cannot be initialized in a castling move");
}
if (m_score) throw std::logic_error("ribi::Chess::Move::Move exception: m_piece cannot be initialized in a score move");
const bool valid = m_piece->CanDoMove(this);
if (!valid)
{
const std::string t = "Move " + s + " invalid for " + m_piece->GetName();
throw std::logic_error(t.c_str());
}
}
}
Version::Version(const StringRef& versionString)
{
*this = ParseFrom(versionString);
}
