<\/span><\/h2>\nIn C++:<\/p>\n
#include <iostream>\r\n#include <memory>\r\n#include <string>\r\n\r\nclass MyClass {\r\n private:\r\n std::string property1;\r\n\r\n void Method1(std::string param1, int param2);\r\n\r\n public:\r\n std::string property2;\r\n\r\n MyClass(std::string constructor_argument);\r\n int Method2(int param);\r\n};\r\n\r\nMyClass::MyClass(std::string constructor_argument) {\r\n this->property1 = constructor_argument;\r\n}\r\n\r\nvoid MyClass::Method1(std::string param1, int param2) {\r\n std::cout << param1 << std::endl << param2 << std::endl;\r\n std::cout << this->property2 << std::endl;\r\n}\r\n\r\nint MyClass::Method2(int param) {\r\n this->Method1(this->property1, param);\r\n\r\n return param + 1;\r\n}\r\n\r\nint main(int argc, char *argv[]) {\r\n auto obj = std::make_unique<MyClass>(\"property 1 value\");\r\n\r\n obj->property2 = \"property 2 value\";\r\n\r\n std::cout << obj->Method2(4) << std::endl;\r\n\r\n return 0;\r\n}<\/pre>\nGo equivalent:<\/p>\n
package main\r\n\r\nimport \"fmt\"\r\n\r\ntype MyClass struct {\r\n\t\/\/ properties that start with a lowercase character are private\r\n\tproperty1 string\r\n\t\/\/ properties that start with an uppercase character are public\r\n\tProperty2 string\r\n\r\n\t\/*\r\n\t\tKeep in mind that public and private in Golang actually\r\n\t\tmeans exported by package. Code from the same package\r\n\t\tcan access a structure's private properties and methods.\r\n\t*\/\r\n}\r\n\r\nfunc NewMyClass(constructor_argument string) *MyClass {\r\n\treturn &MyClass{property1: constructor_argument}\r\n}\r\n\r\nfunc (mc *MyClass) method1(param1 string, param2 int) {\r\n\tfmt.Printf(\"%s\\n%d\\n\", param1, param2)\r\n\tfmt.Printf(\"%s\\n\", mc.property1)\r\n}\r\n\r\nfunc (mc *MyClass) Method2(param int) int {\r\n\tmc.method1(mc.property1, param)\r\n\r\n\treturn param + 1\r\n}\r\n\r\nfunc main() {\r\n\tobj := NewMyClass(\"property 1 value\")\r\n\r\n\tobj.Property2 = \"property 2 value\"\r\n\r\n\tfmt.Printf(\"%d\\n\", obj.Method2(4))\r\n\r\n\t\/\/ No return needed\r\n}\r\n<\/pre>\n<\/span>Inheritance (sort of)<\/span><\/h2>\nIn C++:<\/p>\n
#include <iostream>\r\n#include <memory>\r\n#include <string>\r\n\r\nclass BaseClass {\r\n public:\r\n std::string property1;\r\n void method1();\r\n};\r\n\r\nvoid BaseClass::method1() {\r\n std::cout << this->property1 << std::endl;\r\n}\r\n\r\nclass DerivedClass : public BaseClass {\r\n public:\r\n std::string property2;\r\n void method2();\r\n};\r\n\r\nvoid DerivedClass::method2() {\r\n std::cout << this->property2 << std::endl;\r\n}\r\n\r\nint main(int argc, char *argv[]) {\r\n auto obj = std::make_unique<DerivedClass>();\r\n obj->property1 = \"property 1 value\";\r\n obj->property2 = \"property 2 value\";\r\n\r\n obj->method1();\r\n obj->method2();\r\n\r\n return 0;\r\n}<\/pre>\nGo equivalent:<\/p>\n
package main\r\n\r\nimport \"fmt\"\r\n\r\ntype BaseClass struct {\r\n\tProperty1 string\r\n\r\n\t\/\/ no need for method declaration here\r\n}\r\n\r\nfunc (bc *BaseClass) Method1() {\r\n\tfmt.Printf(\"%s\\n\", bc.Property1)\r\n}\r\n\r\ntype DerivedClass struct {\r\n\tBaseClass \/\/ this is actually composition\r\n\r\n\tProperty2 string\r\n}\r\n\r\nfunc (dc *DerivedClass) Method2() {\r\n\tfmt.Printf(\"%s\\n\", dc.Property2)\r\n}\r\n\r\nfunc main() {\r\n\tobj := &DerivedClass{}\r\n\tobj.Property1 = \"property 1 value\"\r\n\tobj.Property2 = \"property 2 value\"\r\n\r\n\tobj.Method1()\r\n\tobj.Method2()\r\n\r\n\t\/\/ no need to return\r\n}\r\n<\/pre>\n<\/span>Interfaces<\/span><\/h2>\nIn C++:<\/p>\n
#include <iostream>\r\n#include <memory>\r\n#include <string>\r\n\r\nclass MyInterface {\r\n public:\r\n virtual void method() = 0;\r\n};\r\n\r\nclass Class1 : public MyInterface {\r\n public:\r\n void method() override;\r\n};\r\n\r\nvoid Class1::method() {\r\n std::cout << \"Class 1\" << std::endl;\r\n}\r\n\r\nclass Class2 : public MyInterface {\r\n public:\r\n void method() override;\r\n};\r\n\r\nvoid Class2::method() {\r\n std::cout << \"Class 2\" << std::endl;\r\n}\r\n\r\nstd::shared_ptr<MyInterface> NewClass1() {\r\n return std::make_shared<Class1>();\r\n}\r\n\r\nstd::shared_ptr<MyInterface> NewClass2() {\r\n return std::make_shared<Class2>();\r\n}\r\n\r\nint main(int argc, char *argv[]) {\r\n auto obj1 = NewClass1();\r\n auto obj2 = NewClass2();\r\n\r\n obj1->method();\r\n obj2->method();\r\n\r\n return 0;\r\n}<\/pre>\nGo equivalent:<\/p>\n
package main\r\n\r\nimport \"fmt\"\r\n\r\ntype MyInterface interface {\r\n\tMethod()\r\n}\r\n\r\ntype Class1 struct {\r\n}\r\n\r\nfunc (c1 *Class1) Method() {\r\n\tfmt.Println(\"Class 1\")\r\n}\r\n\r\ntype Class2 struct {\r\n}\r\n\r\nfunc (c2 *Class2) Method() {\r\n\tfmt.Println(\"Class 2\")\r\n}\r\n\r\nfunc NewClass1() MyInterface {\r\n\treturn &Class1{}\r\n}\r\n\r\nfunc NewClass2() MyInterface {\r\n\treturn &Class2{}\r\n}\r\n\r\nfunc main() {\r\n\tobj1 := NewClass1()\r\n\tobj2 := NewClass2()\r\n\r\n\tobj1.Method()\r\n\tobj2.Method()\r\n}\r\n<\/pre>\n<\/span>Conclusion<\/span><\/h2>\nThere are basic equivalences between traditional OOP languages like C++ and the syntax and functionality that Golang provides.<\/p>\n
In it’s own simple way, Golang provides ways to implement encapsulation, inheritance and polymorphism. In my humble opinion, these mechanisms are enough for most object-oriented projects.<\/p>\n","protected":false},"excerpt":{"rendered":"
Before I started to learn Go, every online opinion I would read about the language complained about the lack of […]<\/p>\n","protected":false},"author":28,"featured_media":2709,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[73,78,86],"tags":[],"yst_prominent_words":[281,809,970,1013,1179,1180,1181,1182,1183,1184,1185,1186,1187,1188,1189],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/posts\/2650"}],"collection":[{"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/users\/28"}],"replies":[{"embeddable":true,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/comments?post=2650"}],"version-history":[{"count":4,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/posts\/2650\/revisions"}],"predecessor-version":[{"id":133355,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/posts\/2650\/revisions\/133355"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/media\/2709"}],"wp:attachment":[{"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/media?parent=2650"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/categories?post=2650"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/tags?post=2650"},{"taxonomy":"yst_prominent_words","embeddable":true,"href":"https:\/\/intelligentbee.com\/blog\/wp-json\/wp\/v2\/yst_prominent_words?post=2650"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}