support bazel complie this project and format code.

learn_class/modern_cpp_30/SFINAE/sfinae paper/serialize.cpp

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+//
+// Created by light on 20-1-6.
+//
+
+#include <boost/hana.hpp>
+#include <iostream>
+#include <string>
+#include "structData.h"
+using namespace std;
+
+namespace hana = boost::hana;
+// 检查类型是否有一个serialize方法
+auto hasSerialize = hana::is_valid([](auto &&x) -> decltype(x.serialize()) {});
+
+// 序列化任意对象
+template<typename T>
+std::string serialize(T const &obj) {
+    return hana::if_(hasSerialize(obj),
+                     [](auto &x) { return x.serialize(); },
+                     [](auto &x) { return to_string(x); }
+    )(obj);
+}
+
+
+
+int main() {
+    A a;
+    B b;
+    C c;
+    std::cout << serialize(a) << std::endl;
+    std::cout << serialize(b) << std::endl;
+    std::cout << serialize(c) << std::endl;
+}
+
+