In the following code snippet, I want to replace all the 'brdf_' variables with the string brdf_data_pnt.  I use the find and replace tool with the 'match entire word only' and 'match as regular expression' options checked so that only 'brdf_' variables are found (not the brdf_ substring of m_brdf_vec).  When I replace each item, the results are not as expected.  The character immediately before 'brdf_' is duplicated.  If I turn off the 'match as regular expression' option, this error does not occur, but then I am left with manually filtering through the found results to avoid replacing substrings (ie. m_brdf_vec -> m_brdf_data_pntvec).

Original:

  brdfDataPnt_t &brdf_ = m_brdf_vec.front();
  m_curve_vec.reserve(num_curves);
  m_curve_vec.push_back( Curve(brdf_.i_angle, brdf_.wavelength, brdf_.wavelength_idx) );
  m_curve_vec.back().InsertDataPoint(static_cast<double>(brdf_.r_angle), brdf_.reflectivity);
  wavelength_idx_ = brdf_.wavelength_idx;
  for(auto it = m_brdf_vec.begin() + 1; it != m_brdf_vec.end(); ++it){
    if(it->wavelength_idx != wavelength_idx_){
      wavelength_idx_ = it->wavelength_idx;
      m_curve_vec.push_back( Curve(it->i_angle, it->wavelength, it->wavelength_idx) );
    }
    m_curve_vec.back().InsertDataPoint(static_cast<double>(it->r_angle), it->reflectivity);
  }


After string replacing:

  brdfDataPnt_t &&brdf_data_pnt = m_brdf_vec.front();
  m_curve_vec.reserve(num_curves);
  m_curve_vec.push_back( Curve((brdf_data_pnt.i_angle,  brdf_data_pnt.wavelength,  brdf_data_pnt.wavelength_idx) );
  m_curve_vec.back().InsertDataPoint(static_cast<double>((brdf_data_pnt.r_angle),  brdf_data_pnt.reflectivity);
  wavelength_idx_ =  brdf_data_pnt.wavelength_idx;
  for(auto it = m_brdf_vec.begin() + 1; it != m_brdf_vec.end(); ++it){
    if(it->wavelength_idx != wavelength_idx_){
      wavelength_idx_ = it->wavelength_idx;
      m_curve_vec.push_back( Curve(it->i_angle, it->wavelength, it->wavelength_idx) );
    }
    m_curve_vec.back().InsertDataPoint(static_cast<double>(it->r_angle), it->reflectivity);
  }