In some of my cleanup efforts, I came across StringReader which seemed to duplicate what OOFEMTXTInputRecord does, so I investigated some more.

Seems like it is only used in one place, in OOFEG. I wrote a small replacement code, but as I don't use it myself, I thought I would post it here instead.
Borek, does this work as a replacement?

void
oofegGraphicContext :: setElementFilterState(char *initString)
{
    OOFEMTXTInputRecord parser(initString);

    element_filter.clear();
    parser.giveField(element_filter, IFT_Unknown, "element_filter");
}

If so, then I believe StringReader is completely unused and can be removed.