Method appendFileIfNew

lib/tokenlist.cpp:94–111

TODO: also update mOrigFiles?

// TODO: also update mOrigFiles?
int TokenList::appendFileIfNew(std::string fileName)
{
    assert(!fileName.empty());

    // Has this file been tokenized already?
    auto it = std::find_if(mFiles.cbegin(), mFiles.cend(), [&](const std::string& f) {
        return Path::sameFileName(f, fileName);
    });
    if (it != mFiles.cend())
        return static_cast<int>(std::distance(mFiles.cbegin(), it));

    assert(mTokensFrontBack->front == nullptr); // has no effect if tokens have already been created

    // The "mFiles" vector remembers what files have been tokenized..
    mFiles.push_back(std::move(fileName));

    return mFiles.size() - 1;
}

void TokenList::clangSetOrigFiles()
{