Init

ACMOJ-2096.cpp

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+#include <iostream>
+#include "ACMOJ-2096.hpp"
+
+#include <iostream>
+
+signed main() {
+    using koishi::any;
+    any x;
+    x = 1919810;
+    std::cout << x.cast <int> () << std::endl;
+    x = 114.514;
+
+    try {
+        std::cout << x.cast <int> () << std::endl;
+    } catch (const std::exception &e) {
+        std::cout << e.what() << std::endl;
+    }
+
+    auto ptr = x.try_cast <double> ();
+    if (ptr) std::cout << "Double value: " << *ptr << std::endl;
+    // if C++ 17 or later, try this:
+    // if (auto ptr = x.try_cast <double> ()) std::cout << "Double value: " << *ptr << std::endl;
+
+    any y {x};
+    std::cout << y.cast <double> () << std::endl;
+
+    any z {std::move(x)};
+    if (x.is_empty()) std::cout << "x is empty" << std::endl;
+
+    std::cout << z.cast <double> () << std::endl;
+    return 0;
+}