doc ru, printf() before assert in containers

libs/main/containers/pimap.h

@@ -208,6 +208,11 @@ public:
 	const T at(const Key & key) const {return (*this)[key];}
 	
 	PIMap<Key, T> & operator <<(const PIMap<Key, T> & other) {
+#ifdef USE_DEBUG
+		if (&other == this) {
+			printf("error with PIMap<%s, %s>::<<\n", __PIP_TYPENAME__(Key), __PIP_TYPENAME__(T));
+		}
+#endif
 		assert(&other != this);
 		if (other.isEmpty()) return *this;
 		if (other.size() == 1) {insert(other.pim_index[0].key, other.pim_content[0]); return *this;}