Fix several compile errors in swizzle.h

Author: stijnh

include/kernel_float/iterate.h

@@ -54,7 +54,7 @@ KERNEL_FLOAT_INLINE vector_storage<T, N> range() {
  */
 template<typename V>
 KERNEL_FLOAT_INLINE into_vector_type<V> range_like(V&& vector) {
-    return range<vector_value_type<T>, vector_size<V>>();
+    return range<vector_value_type<V>, vector_size<V>>();
 }
 
 /**

include/kernel_float/meta.h

@@ -19,7 +19,7 @@ struct index_sequence {};
 
 namespace detail {
 template<size_t N, size_t X, size_t... Is>
-struct make_index_sequence_helper: make_index_sequence_helper<N - 1, X + N - 1, Is...> {};
+struct make_index_sequence_helper: make_index_sequence_helper<N - 1, X, X + N - 1, Is...> {};
 
 template<size_t... Is, size_t X>
 struct make_index_sequence_helper<0, X, Is...> {

include/kernel_float/swizzle.h

@@ -29,7 +29,7 @@ struct vector_swizzle<Output, Input, index_sequence<Is...>> {
  */
 template<size_t... Is, typename V>
 KERNEL_FLOAT_INLINE vector_storage<vector_value_type<V>, sizeof...(Is)>
-swizzle(V&& input, index_sequence < Is... >= {}) {
+swizzle(V&& input, index_sequence<Is...> _ = {}) {
     using Input = into_vector_type<V>;
     using Output = vector_storage<vector_value_type<V>, sizeof...(Is)>;
 
@@ -176,7 +176,7 @@ struct recur_concat_helper<U> {
     using type = U;
 
     KERNEL_FLOAT_INLINE static U call(U&& input) {
-        return output;
+        return input;
     }
 };
 

include/kernel_float/unops.h

@@ -179,7 +179,7 @@ KERNEL_FLOAT_INLINE Output broadcast(Input&& input) noexcept {
     return detail::broadcast_helper<Input, Output>::call(std::forward<Input>(input));
 }
 
-#ifdef DOXYGEN_SHOULD_SKIP_THIS
+#ifndef DOXYGEN_SHOULD_SKIP_THIS
 template<size_t N, typename Input, typename Output = vector_storage<vector_value_type<Input>, N>>
 KERNEL_FLOAT_INLINE Output broadcast(Input&& input) noexcept {
     return detail::broadcast_helper<Input, Output>::call(std::forward<Input>(input));