Initial Course

modules/11_cpp17/include/variant.hpp

@@ -0,0 +1,15 @@
+#pragma once
+
+#include <string>
+#include <variant>
+#include <vector>
+
+namespace cpp17 {
+
+using Value = std::variant<int, double, std::string>;
+
+[[nodiscard]] auto variant_to_string(const Value& value) -> std::string;
+[[nodiscard]] auto sum_numeric_variants(const std::vector<Value>& values) -> double;
+[[nodiscard]] auto is_string(const Value& value) -> bool;
+
+}  // namespace cpp17