overloading

Overload function int… and long… simultaneously

穿精又带淫゛_ 提交于 2019-12-06 10:44:11
I want to create two functions, say long min(long...); int min(int...); But when I try to invoke the second i.e min(1, 5) one I get ambiguous method call Is there workaround except renaming? It is a known bug The behaviour you describe is a bug which has been fixed with Java 7. See details in the release notes , section called "Changes in Most Specific Varargs Method Selection". The reason why it should compile Variable arity comes last in determining the most specific method. The rules to determine which vararg method applies when there are several are defined in JLS 15.12.2.4 - here is an

Overload * operator in python (or emulate it)

雨燕双飞 提交于 2019-12-06 08:11:08
问题 I want to overload the * operator in python. In C++, you can overload the dereference operator, so that you can create a class with a custom way to respond to *alpha . Part of this question is that I don't know exactly, and I mean EXACTLY, what the * operator (unpacking operator as I call it) does. So how can I overload it, or emulate the overloading of it. Eventually I want to be able to do: *alpha with a custom response and return value. EDIT: I found the solution thanks to Joe Kington's

are static and non static overloads each other

坚强是说给别人听的谎言 提交于 2019-12-06 07:39:06
问题 Does these two function overloads class yogi{ public static void fun(){ System.out.println("Fun"); } public void fun(int a,int b){ System.out.println("int"); } } 回答1: Yes, those are overloads. From JLS 8.4.9: If two methods of a class (whether both declared in the same class, or both inherited by a class, or one declared and one inherited) have the same name but signatures that are not override-equivalent, then the method name is said to be overloaded. It's fairly rare (IMO) for it to be a

segmentation fault in overloading operator =

徘徊边缘 提交于 2019-12-06 07:22:29
I just got a seg fault in overloading the assignment operator for a class FeatureRandomCounts, which has _rects as its pointer member pointing to an array of FeatureCount and size rhs._dim, and whose other date members are non-pointers: FeatureRandomCounts & FeatureRandomCounts::operator=(const FeatureRandomCounts &rhs) { if (_rects) delete [] _rects; *this = rhs; // segment fault _rects = new FeatureCount [rhs._dim]; for (int i = 0; i < rhs._dim; i++) { _rects[i]=rhs._rects[i]; } return *this; } Does someone have some clue? Thanks and regards! As mentioned, you have infinite recursion;

Ambiguous overload accessing argument-less template functions with variadic parameters

依然范特西╮ 提交于 2019-12-06 06:40:20
Yeah, the title can scare babies, but it's actually quite straightforward. I am trying to store a function pointer to a specialized template function, namely boost::make_shared (boost 1.41), as illustrated: boost::shared_ptr<int> (*pt2Function)() = boost::make_shared<int>; However, it won't compile (GCC 4.4.1) due to the fact that boost::make_shared has the following two specializations which the compiler can't tell apart in this context: template< class T > boost::shared_ptr< T > make_shared() ... template< class T, class... Args > boost::shared_ptr< T > make_shared( Args && ... args ) The

Is Method Overloading a Type of Polymorphism? [duplicate]

前提是你 提交于 2019-12-06 06:14:59
This question already has answers here : Is Method Overloading considered polymorphism? [closed] (8 answers) Closed 5 years ago . I was studying about static and dynamic polymorphism and got these links: http://guruzon.com/1/oop-concepts/polymorphism/what-is-polymorphism-example-tutorial-uml-diagram-notation http://www.coderanch.com/t/379004/java/java/static-polymorphism-dynamic-polymorphism http://javarevisited.blogspot.in/2011/08/what-is-polymorphism-in-java-example.html In all these links , It has been said that Overloading is an example of polymorphism , then I came across two more places

Resolving ambiguity

不打扰是莪最后的温柔 提交于 2019-12-06 06:12:58
问题 I have a controller with 3 overloads for a create method: public ActionResult Create() {} public ActionResult Create(string Skill, int ProductId) {} public ActionResult Create(Skill Skill, Component Comp) {} in one of my views I want to create this thing so I call it like this: <div id="X"> @Html.Action("Create") </div> but I get the error: {"The current request for action 'Create' on controller type 'XController' is ambiguous between the following action methods: System.Web.Mvc.ActionResult

Java overloaded method in library fails when not run in web server

↘锁芯ラ 提交于 2019-12-06 05:07:28
I am trying to write a small library that can either be used in a standard java app or as part of a servlet. I have defined a couple of overloaded methods as follows: // imports etc. public ExampleLibrary { /** * This one is meant to be used by a J2SE app */ public String processData(Map headers) throws MyException { // process // return result } /** * This one is meant to be used by a servlet */ public String processData(HttpServletRequest request) throws MyException { // extract headers from request // process // return result } // other methods..... } This works great when used as part of a

Virtual assignment operator overloading- how the correct overloaded function is chosen?

a 夏天 提交于 2019-12-06 04:49:23
The following code (from C++ FAQs 24.11) is implementing virtual assignment operator overloading and overriding: #include <iostream> using namespace std; class B{ public: virtual ~B() throw(); virtual B& operator= (const B& b) throw(); }; B::~B() throw(){} B& B::operator= (const B& b) throw() { cout << "B::operator=(const B&)\n"; return *this; } class D : public B{ public: virtual D& operator= (const B& b) throw(); D& operator= (const D& d) throw(); }; D& D::operator= (const B& b) throw() {cout << "D::operator= (const B&)\n"; return *this;} D& D::operator= (const D& d) throw() {cout << "D:

C++ Template operator overload

亡梦爱人 提交于 2019-12-06 04:46:09
I'm writing a template matrix class, and I am a bit confused as to how overloading the * operator would work. I would want to overload something like this (omitting irrelevant code): template<typename T>class Matrix4t { friend vector3 operator*(const vector3 &inputV3, const matrix4t &inputM4t); template <typename scalarT> friend scalarT operator*(const scalarT &inputSclT, const matrix4t &inputM4t); public: const matrix4t operator*(const matrix4t) vector3 operator*(const vector3 &inputV3); template <typename scalarT> const matrix4t operator*(const scalarT&); } Assuming correct definitions for