try to fix msvs build

Author: igagis

src/utki/shared_ref.hpp

@@ -185,13 +185,32 @@ class shared_ref
 	 * @brief Equality operator for comparison with another object.
 	 * Needed for using shared_ref in ordered containers (e.g. std::set).
 	 * Effectively calls operator==() of the pointed-to object.
+	 * @param r - left hand side of the operator.
+	 * @param o - right hand side of the operator.
 	 * @return true if this object is equal to the other object.
 	 * @return false otherwise.
 	 */
 	friend constexpr bool operator==(const shared_ref& r, const object_type& o) noexcept
 	{
 		return r.get() == o;
 	}
+
+	/**
+	 * @brief Equality operator for comparison with another object.
+	 * Needed for using shared_ref in ordered containers (e.g. std::set).
+	 * Effectively calls operator==() of the pointed-to object.
+	 * @param l - left hand side of the operator.
+	 * @param r - right hand side of the operator.
+	 * @return true if this object is equal to the other object.
+	 * @return false otherwise.
+	 */
+	friend constexpr bool operator==(
+		const shared_ref& l, //
+		const shared_ref& r
+	) noexcept
+	{
+		return l.get() == r.get();
+	}
 };
 
 /**

tests/unit/src/shared_ref.cpp

@@ -291,8 +291,8 @@ const tst::set set("shared_ref", [](tst::suite& suite) {
 		std::set<utki::shared_ref<a0>> set;
 
 		auto v1 = utki::make_shared<a0>(1);
-		auto v2 = utki::make_shared<a1>(2);
-		auto v3 = utki::make_shared<a1>(3);
+		auto v2 = utki::make_shared<a0>(2);
+		auto v3 = utki::make_shared<a0>(3);
 
 		set.insert(v1);
 		set.insert(v2);