Fixed Clang warnings

glm/detail/_swizzle.hpp

@@ -54,6 +54,32 @@ namespace detail
 	template<int N, typename T, qualifier Q, int E0, int E1, int E2, int E3, int DUPLICATE_ELEMENTS>
 	struct _swizzle_base2 : public _swizzle_base1<N, T, Q, E0,E1,E2,E3, detail::is_aligned<Q>::value>
 	{
+		struct op_equal
+		{
+			GLM_FUNC_QUALIFIER void operator() (T& e, T& t) const{ e = t; }
+		};
+
+		struct op_minus
+		{
+			GLM_FUNC_QUALIFIER void operator() (T& e, T& t) const{ e -= t; }
+		};
+
+		struct op_plus
+		{
+			GLM_FUNC_QUALIFIER void operator() (T& e, T& t) const{ e += t; }
+		};
+
+		struct op_mul
+		{
+			GLM_FUNC_QUALIFIER void operator() (T& e, T& t) const{ e *= t; }
+		};
+
+		struct op_div
+		{
+			GLM_FUNC_QUALIFIER void operator() (T& e, T& t) const{ e /= t; }
+		};
+
+	public:
 		GLM_FUNC_QUALIFIER _swizzle_base2& operator= (const T& t)
 		{
 			for (int i = 0; i < N; ++i)
@@ -63,43 +89,28 @@ namespace detail
 
 		GLM_FUNC_QUALIFIER _swizzle_base2& operator= (vec<N, T, Q> const& that)
 		{
-			struct op {
-				GLM_FUNC_QUALIFIER void operator() (T& e, T& t) const{ e = t; }
-			};
-			_apply_op(that, op());
+			_apply_op(that, op_equal());
 			return *this;
 		}
 
 		GLM_FUNC_QUALIFIER void operator -= (vec<N, T, Q> const& that)
 		{
-			struct op {
-				GLM_FUNC_QUALIFIER void operator() (T& e, T& t) const{ e -= t; }
-			};
-			_apply_op(that, op());
+			_apply_op(that, op_minus());
 		}
 
 		GLM_FUNC_QUALIFIER void operator += (vec<N, T, Q> const& that)
 		{
-			struct op {
-				GLM_FUNC_QUALIFIER void operator() (T& e, T& t) const{ e += t; }
-			};
-			_apply_op(that, op());
+			_apply_op(that, op_plus());
 		}
 
 		GLM_FUNC_QUALIFIER void operator *= (vec<N, T, Q> const& that)
 		{
-			struct op {
-				GLM_FUNC_QUALIFIER void operator() (T& e, T& t) const{ e *= t; }
-			};
-			_apply_op(that, op());
+			_apply_op(that, op_mul());
 		}
 
 		GLM_FUNC_QUALIFIER void operator /= (vec<N, T, Q> const& that)
 		{
-			struct op {
-				GLM_FUNC_QUALIFIER void operator() (T& e, T& t) const{ e /= t; }
-			};
-			_apply_op(that, op());
+			_apply_op(that, op_div());
 		}
 
 		GLM_FUNC_QUALIFIER T& operator[](size_t i)