Correct directory name and refactor valarray

Author: XuhuaHuang

CMakeLists.txt

@@ -41,4 +41,4 @@ add_subdirectory("VariadicTemplateParameter")
 add_subdirectory("Vector")
 add_subdirectory("View")
 add_subdirectory("VirtualPointer")
-add_subdirectory("WriteAccessStructralBinding")
+add_subdirectory("WriteAccessStructuralBinding")

Util/type_name.hh

@@ -0,0 +1,40 @@
+/**
+ * @file type_name.hh
+ * @author Xuhua Huang
+ * @brief
+ * @version 0.1
+ * @date 2025-09-23
+ *
+ * @copyright Copyright (c) 2025
+ *
+ */
+
+#ifndef TYPE_NAME_HH
+#define TYPE_NAME_HH
+
+#include <string_view>
+
+namespace util {
+namespace type {
+
+template <typename T> constexpr std::string_view type_name() {
+#if defined(__clang__)
+  std::string_view p = __PRETTY_FUNCTION__;
+  return p.substr(p.find('=') + 2, p.rfind(']') - p.find('=') - 2);
+#elif defined(__GNUC__)
+  std::string_view p = __PRETTY_FUNCTION__;
+  return p.substr(p.find('=') + 2, p.rfind(']') - p.find('=') - 2);
+#elif defined(_MSC_VER)
+  std::string_view p = __FUNCSIG__;
+  auto start = p.find("type_name<") + 10;
+  auto end = p.find(">(void)");
+  return p.substr(start, end - start);
+#else
+#error "Unsupported compiler"
+#endif
+}
+
+} // namespace type
+} // namespace util
+
+#endif //! TYPE_NAME_HH

ValArray/valarray_notes.cpp

@@ -74,11 +74,11 @@ int main() {
   log << val << "\n";
   log << val.size() << "\n";
   val.resize(1);
-  val[0] = 3.14;
+  val[0] = 3.14F;
   log << val << "\n";
 
   val.resize(2);
-  val[1] = 2.71;
+  val[1] = 2.71F;
   log << val << "\n";
 
   // create a valarray of size 5, initialized with values 0, 1, 2, 3, 4
@@ -102,7 +102,7 @@ int main() {
   auto v4 = v3.apply([](int x) -> int { return x / 2; });
   log << "v4 is of type std::valarray<int>: "
       << std::is_same_v<decltype(v4), std::valarray<int>> << "\n";
-  log << typeid(v4).name() << "\n";  // class std::valarray<int>
+  log << typeid(v4).name() << "\n"; // class std::valarray<int>
 #if defined(__GNUC__)
   log << type_name<decltype(v4)>() << "\n";
 #elif defined(_MSC_VER)