Initial Course

modules/11_cpp17/include/if_constexpr.hpp

@@ -0,0 +1,36 @@
+#pragma once
+
+#include <cstddef>
+#include <string>
+#include <type_traits>
+#include <vector>
+
+namespace cpp17 {
+
+template <typename T>
+[[nodiscard]] constexpr auto type_name() -> const char* {
+    if constexpr (std::is_integral_v<T>) {
+        return "integral";
+    } else if constexpr (std::is_floating_point_v<T>) {
+        return "floating";
+    } else {
+        return "other";
+    }
+}
+
+template <typename Container>
+[[nodiscard]] auto element_count(const Container& container) -> std::size_t {
+    if constexpr (std::is_member_function_pointer_v<decltype(&Container::size)>) {
+        return container.size();
+    } else {
+        std::size_t count = 0;
+        for ([[maybe_unused]] const auto& item : container) {
+            ++count;
+        }
+        return count;
+    }
+}
+
+[[nodiscard]] auto stringify_ints(const std::vector<int>& data) -> std::string;
+
+}  // namespace cpp17