PREQ_INSTALL.sdsl-lite.patch

diff --git a/include/sdsl/int_vector.hpp b/include/sdsl/int_vector.hpp
index c6d4114..90568b7 100644
--- a/include/sdsl/int_vector.hpp
+++ b/include/sdsl/int_vector.hpp
@@ -541,6 +541,15 @@ class int_vector
         //! Greater of equal operator
         bool operator>=(const int_vector& v) const;

+        //! bitwise-and-update operator
+        int_vector& operator&=(const int_vector& v);
+
+        //! bitwise-or-update equal operator
+        int_vector& operator|=(const int_vector& v);
+
+        //! bitwise-xor-update operator
+        int_vector& operator^=(const int_vector& v);
+
         //! Iterator that points to the first element of the int_vector.
         /*!  Time complexity guaranty is O(1).
          */
@@ -1504,6 +1513,36 @@ bool int_vector<t_width>::operator!=(const int_vector& v)const
 }

 template<uint8_t t_width>
+int_vector<t_width>& int_vector<t_width>::operator&=(const int_vector& v)
+{
+    assert(bit_size() == v.bit_size());
+    assert(v.capacity() <= capacity());
+    for (uint64_t i=0; i<(v.capacity()>>6); ++i)
+        m_data[i] &= v.m_data[i];
+    return *this;
+}
+
+template<uint8_t t_width>
+int_vector<t_width>& int_vector<t_width>::operator|=(const int_vector& v)
+{
+    assert(bit_size() == v.bit_size());
+    assert(v.capacity() <= capacity());
+    for (uint64_t i=0; i<(v.capacity()>>6); ++i)
+        m_data[i] |= v.m_data[i];
+    return *this;
+}
+
+template<uint8_t t_width>
+int_vector<t_width>& int_vector<t_width>::operator^=(const int_vector& v)
+{
+    assert(bit_size() == v.bit_size());
+    assert(v.capacity() <= capacity());
+    for (uint64_t i=0; i<(v.capacity()>>6); ++i)
+        m_data[i] ^= v.m_data[i];
+    return *this;
+}
+
+template<uint8_t t_width>
 typename int_vector<t_width>::size_type int_vector<t_width>::write_data(std::ostream& out) const
 {
     size_type written_bytes = 0;