Added serialization support for std::vector<bool>.

dlib/serialize.h

@@ -806,6 +806,43 @@ namespace dlib
         { throw serialization_error(e.info + "\n   while deserializing object of type std::set"); }
     }
 
+// ----------------------------------------------------------------------------------------
+
+    template <typename alloc>
+    void serialize (
+        const std::vector<bool,alloc>& item,
+        std::ostream& out
+    )
+    {
+        std::vector<unsigned char> temp(item.size());
+        for (unsigned long i = 0; i < item.size(); ++i)
+        {
+            if (item[i])
+                temp[i] = '1';
+            else
+                temp[i] = '0';
+        }
+        serialize(temp, out);
+    }
+
+    template <typename alloc>
+    void deserialize (
+        std::vector<bool,alloc>& item,
+        std::istream& in 
+    )
+    {
+        std::vector<unsigned char> temp;
+        deserialize(temp, in);
+        item.resize(temp.size());
+        for (unsigned long i = 0; i < temp.size(); ++i)
+        {
+            if (temp[i] == '1')
+                item[i] = true;
+            else
+                item[i] = false;
+        }
+    }
+
 // ----------------------------------------------------------------------------------------
 
     template <typename T, typename alloc>

dlib/test/serialize.cpp

@@ -530,6 +530,32 @@ namespace
         }
     }
 
+    void test_vector_bool (
+    )
+    {
+        std::vector<bool> a, b;
+
+        a.push_back(true);
+        a.push_back(true);
+        a.push_back(false);
+        a.push_back(true);
+        a.push_back(false);
+        a.push_back(true);
+
+        ostringstream sout;
+        dlib::serialize(a, sout);
+        istringstream sin(sout.str());
+
+        dlib::deserialize(b, sin);
+
+
+        DLIB_TEST(a.size() == b.size());
+        DLIB_TEST(a.size() == 6);
+        for (unsigned long i = 0; i < a.size(); ++i)
+        {
+            DLIB_TEST(a[i] == b[i]);
+        }
+    }
 
 
     class serialize_tester : public tester
@@ -554,6 +580,7 @@ namespace
             test_vector<char>();
             test_vector<unsigned char>();
             test_vector<int>();
+            test_vector_bool();
         }
     } a;