Random Vector Manipulation - c++11

Question

I would like to use MFC with a combination of std::remove/remove_if with std:erase to manipulate a vector of <std::shared_ptr<CString> > containing a list of file names from a recursively searched root. Imagine the following:
A dialog box containing:
two radio buttons (Keep and Delete)
a number of check boxes with image file
extensions as labels (JPG, TIF, GIF, etc.)
a button to do the action
If I select Keep, I want to keep all the files with the checked extensions and delete everything else or delete them directly if I select Delete. As an example, I thought I could use something similar to
void CPicsDlg::FilterFiles(void)
{
auto end = std::remove_if(g_vFiles.begin(), g_vFiles.end(), [&](std::shared_ptr<CString> const &strFile) { return strFile->Right(3) == "JPG" || strFile->Right(3) == "TIF" });
g_vFiles.erase(end, g_vFiles.end());
}
if I wanted to keep or delete files with just those 2 extensions. But I'll never know which checkboxes are selected, so I'm not sure how to build my condition and I think if I try to use remove_if for one at a time, then files I want to keep or delete in addition to the first one will already be removed from the vector! I don't think remove can be used because it wants a specific value and obviously all the files and paths will be unique. I probably could iterate through the vector and keep or delete each one that meets my condition at that index, but that seems like overkill. So how do I go about accomplishing this?
I hope this makes sense and if something similar has been covered elsewhere, please direct me there. TIA

Answer 1

If I understand the uestion correct it is just a simple XOR
Keep Match ToDelete
0 0 0
0 1 1
1 0 1
1 1 0
The code is
bool bKeep = IsDlgButtonChecked(IDC_KEEP)!=0;
bool bTypeJPG = IsDlgButtonChecked(IDC_JPG)!=0;
bool bTypeTIF = IsDlgButtonChecked(IDC_TIF)!=0;
...
auto end = std::remove_if(g_vFiles.begin(), g_vFiles.end(),
[&](std::shared_ptr<CString> const &strFile)
{
return bKeep ^
((bTypeJPG && strFile->Right(4)==".JPG") ||
(bTypeTIF && strFile->Right(4)==".TIF") ||
(bType... && strFile->Right(4)=="...."))
}
);