support bazel complie this project and format code.

learn_class/modern_cpp_30/compilerpoly/template.cpp

@@ -0,0 +1,82 @@
+//
+// Created by light on 19-12-27.
+//
+#include<iostream>
+#include <vector>
+#include <cstring>
+
+
+using namespace std;
+
+// 函数模板
+template<typename T>
+bool isEqual(T t1, T t2) {
+    cout << "函数模板" << endl;
+    return t1 == t2;
+}
+
+// 函数模板全特化
+template<>
+bool isEqual(const char *t1, const char *t2) {
+    cout << "函数模板全特化" << endl;
+    return strcmp(t1, t2);
+}
+
+// 函数模板偏特化   C++不支持函数模板偏特化 可以重载解决
+//template<typename T>
+//bool isEqual<T, int>(T a, double b) {
+//    cout << "函数模板偏特化" << endl;
+//    return a == b;
+//}
+
+// 改为重载   下面是重载!!! 而不是偏特化!
+template<typename T>
+bool isEqual(T a, double b) {
+    cout << "函数重载" << endl;
+    return a == b;
+}
+
+/// =============================================================
+
+// 类模板
+template<class T>
+class comp {
+public:
+    bool isEqual(T t1, T t2) {
+        cout << "类模板" << endl;
+        return t1 == t2;
+    }
+};
+
+// 类模板全特化
+template<>
+class comp<const char *> {
+public:
+    bool isEqual(const char *t1, const char *t2) {
+        cout << "类模板全特化" << endl;
+        return strcmp(t1, t2);
+    }
+};
+
+// 类模板偏特化
+template<typename T>
+class comp<T *> {
+public:
+    bool isEqual(T *t1, T *t2) {
+        cout << "类模板偏特化" << endl;
+        return strcmp(t1, t2);
+    }
+};
+
+int main() {
+    isEqual(1, 2);       // 实例化的时候做类型检查
+    isEqual(1, 2.1);
+//    isEqual(1.1, 2.1); // 模糊的!
+    isEqual("qwqw", "asd");
+    comp<int> c;
+    c.isEqual(10, 11);
+    comp<const char *> cc;
+    cc.isEqual("he", "lo");
+    comp<char *> p;
+    p.isEqual("he", "ll");
+}