C++ (Cpp) QMap::upperBound示例

void TextEditorOverlay::mapEquivalentSelections()
{
    m_equivalentSelections.clear();
    m_equivalentSelections.resize(m_selections.size());

    QMap<QString, int> all;
    for (int i = 0; i < m_selections.size(); ++i)
        all.insertMulti(selectionText(i).toLower(), i);

    const QList<QString> &uniqueKeys = all.uniqueKeys();
    foreach (const QString &key, uniqueKeys) {
        QList<int> indexes;
        QMap<QString, int>::const_iterator lbit = all.lowerBound(key);
        QMap<QString, int>::const_iterator ubit = all.upperBound(key);
        while (lbit != ubit) {
            indexes.append(lbit.value());
            ++lbit;
        }

        foreach (int index, indexes)
            m_equivalentSelections[index] = indexes;
    }