Examples of errors detected by the V785 diagnostic

V785. Constant expression in switch statement.

OpenCV

V785 Constant expression in switch statement. approx.cpp 782

CV_IMPL CvSeq*
cvApproxPoly( const void* array, int header_size,
             CvMemStorage* storage, int method,
             double parameter, int parameter2 )
{
  // ....

  if( method != CV_POLY_APPROX_DP )
    CV_Error( cv::Error::StsOutOfRange, "Unknown approximation method" );

  while( src_seq != 0 )
  {
    CvSeq *contour = 0;

    switch (method)
    {
    case CV_POLY_APPROX_DP:
      // ....
    default:
      CV_Error( cv::Error::StsBadArg, "Invalid approximation method" );
    }
    // ....
  }
  return dst_seq;
}

Similar errors can be found in some other places:

• V785 Constant expression in switch statement. qrcode_encoder.cpp 559