overloading

This question already has an answer here : Closed 7 years ago . Possible Duplicate: How to get the address of an overloaded member function? I have a function overloaded for a set of types in a class inheritence heirarchy, e.g. Share with FutureShare and OptionShare derived. virtual unsigned rank() const { return getValue(*this, rank_, &ShareUtils::getRank); } template<typename TShare , typename TMember, typename TGetMemberFunc > TValue& getValue(const TShare& share, boost::optional<TMember>& member, TGetMemberFunc func) { if(!member) { member.reset(func(share)); } return *member; } boost:

func f<T>(a:T)->String { return "Generic" } func f(a:Int)->String { return "Integer" } func alias<T>(a:T)->String { return f(a) } f(1) // "Integer" f("string") // "Generic" alias(1) // "Generic" (shouldn't be "Integer" ?) alias("string") // "Generic" I understand that some form of early (static) binding is happening but I don't understand why. Is it by design or a bug? if by design then alias(a) =/= f(a) but the definition reads exactly alias(a) = f(a) ! 来源： https://stackoverflow.com/questions/32606334/generic-and-early-binding-in-swift-1-2

In my project, I have defined the an annotation similar to the following: (Omitting @Retention , @Target for brevity) public @interface DecaysTo { String[] value(); } Since originally writing it, our needs have changed and I have now defined an enum that I want to be able to use in place of the string: public enum Particle { ELECTRON, ANTIELECTRON, NEUTRINO, ANTINEUTRINO, ... } To avoid updating every instance of this annotation, I would like to be able to construct the annotation with either a String or a member of enum Particle without having to update every instance of this annotation to

I have problem with my wrapping function. template <typename Iter, typename SomeFunction> void wrap(Iter first, Iter last, SomeFunction someFunction) { someFunction(first, last); } I would like to use it like this: template <typename Iter> void fill5(Iter first, Iter last) { fill(first, last, 5); } int main() { vector<int> v(100, -1); wrap(v.begin(), v.end(), fill5); } But I get test.cpp: In function ‘int main()’: test.cpp:16:40: error: no matching function for call to ‘wrap(std::vector<int>::iterator, std::vector<int>::iterator, <unresolved overloaded function type>)’ test.cpp:16:40: note:

When I call the EntryPoint with a parameter of type TemplateA, I always receive an exception, since the first overload is always called. What I expected to happen is that the most specific method (second overload) will be called due to dynamic binding. Any ideas why? private object _obj; public void EntryPoint(object p) { myFunc(p); } //first overload private void myFunc(object container) { throw new NotImplementedException(); } //second overload private void myFunc(TemplateA template) { _obj = new ObjTypeA(template); } //third overload private void myFunc(TemplateB template) { _obj = new

I am using a class Foo that provides these methods: String overloadedMethod(Object) String overloadedMethod(Goo) Since Java statically dispatches on the non-receiver argument, I cannot just pass my value (which is an Object , but might have dynamic type Goo ) and rely on the JVM to dynamically choose the "correct" method. This is my current (ugly) work-around: Object value = ...; Foo foo = new Foo(); if (value instanceof Goo) { Goo gooValue = (Goo) value; return foo.overloadedMethod(gooValue); // -> overloadedMethod(Goo) } else { return foo.overloadedMethod(value); // -> overloadedMethod