Method next

app/src/DataModel/Importers/ProtoImporter.cpp:178–241

* @brief Returns the next token from the source buffer, or Eof on end of input. */

 * @brief Returns the next token from the source buffer, or Eof on end of input.
 */
Token Lexer::next()
{
  skipWsAndComments();

  if (m_pos >= m_src.size())
    return {Tok::Eof, QString(), m_line};

  const QChar c   = m_src[m_pos];
  const int line  = m_line;
  const int start = m_pos;

  if (c.isLetter() || c == QLatin1Char('_')) {
    while (m_pos < m_src.size()
           && (m_src[m_pos].isLetterOrNumber() || m_src[m_pos] == QLatin1Char('_')))
      ++m_pos;
    return {Tok::Ident, m_src.mid(start, m_pos - start), line};
  }

  if (c.isDigit()) {
    while (m_pos < m_src.size()
           && (m_src[m_pos].isLetterOrNumber() || m_src[m_pos] == QLatin1Char('.')
               || m_src[m_pos] == QLatin1Char('+') || m_src[m_pos] == QLatin1Char('-')))
      ++m_pos;
    return {Tok::IntLit, m_src.mid(start, m_pos - start), line};
  }

  if (c == QLatin1Char('"') || c == QLatin1Char('\''))
    return lexStringLiteral(c, line);

  ++m_pos;
  switch (c.unicode()) {
    case '{':
      return {Tok::LBrace, QStringLiteral("{"), line};
    case '}':
      return {Tok::RBrace, QStringLiteral("}"), line};
    case '[':
      return {Tok::LBracket, QStringLiteral("["), line};
    case ']':
      return {Tok::RBracket, QStringLiteral("]"), line};
    case '(':
      return {Tok::LParen, QStringLiteral("("), line};
    case ')':
      return {Tok::RParen, QStringLiteral(")"), line};
    case '<':
      return {Tok::LAngle, QStringLiteral("<"), line};
    case '>':
      return {Tok::RAngle, QStringLiteral(">"), line};
    case '=':
      return {Tok::Eq, QStringLiteral("="), line};
    case ',':
      return {Tok::Comma, QStringLiteral(","), line};
    case ';':
      return {Tok::Semi, QStringLiteral(";"), line};
    case '.':
      return {Tok::Dot, QStringLiteral("."), line};
    case '/':
      return {Tok::Slash, QStringLiteral("/"), line};
    case '-':