overloading

来源： https://stackoverflow.com/questions/63380249/how-can-i-overload-a-function-for-a-concept

来源： https://stackoverflow.com/questions/63145955/how-do-i-compare-a-char-array-from-a-class-with-another-char-array-using-the-ove

问题 I am having a lot of troubles with method overloading here and have no idea why only one method gets called each time regardless the number of parameters I pass into. Below is the sample code. [ClassInterface(ClassInterfaceType.AutoDual), ComVisible(true)] public class myClass { //constructor public myClass() {} //base method public string myfunction(string id, string pk) {return results;} //overloading method 1 public string myfunction(string id, string pk, string param1) { return results;}

问题 I am extending LayerGroup and TileLayer classes to include an id property that I need to identify a specific layer/group of layers (this also reflects an id of a layer DIV in the DOM). Example for TileLayer : export class OperationalLayer extends TileLayer { id: String; constructor(url: string, name: string, id: string) { const source = new TileWMS({ params: {'LAYERS': name}, url: url, }); super({source: source}); this.id = id; } } I also have another class which extends the ol Map class.

问题 I am extending LayerGroup and TileLayer classes to include an id property that I need to identify a specific layer/group of layers (this also reflects an id of a layer DIV in the DOM). Example for TileLayer : export class OperationalLayer extends TileLayer { id: String; constructor(url: string, name: string, id: string) { const source = new TileWMS({ params: {'LAYERS': name}, url: url, }); super({source: source}); this.id = id; } } I also have another class which extends the ol Map class.

问题 I am extending LayerGroup and TileLayer classes to include an id property that I need to identify a specific layer/group of layers (this also reflects an id of a layer DIV in the DOM). Example for TileLayer : export class OperationalLayer extends TileLayer { id: String; constructor(url: string, name: string, id: string) { const source = new TileWMS({ params: {'LAYERS': name}, url: url, }); super({source: source}); this.id = id; } } I also have another class which extends the ol Map class.

问题 I am overloading operators for a data structure, so I have the standard function declarations: T & operator[](int i); //used for regular objects const T & operator[](int i) const; // used for const objects So what I want to do is to have a two versions of operator[] for regular objects: one that does something different when the operator[] is used to write rather than read. I have been reading that this is possible, but I have not yet seen any code. I have seen many times this question asked,

问题 I have a template class Array: template <class T=int, int SIZE=10> class Array { T TheArray[SIZE]; public: void Initialize() { for (int idx=0; idx < SIZE; idx++) { TheArray[idx] = T(); } } T& operator [](int idx) { return TheArray[idx]; } T operator [](int idx) const { return TheArray[idx]; } } I have some questions on operator [] overloading (I found this example on net). I understand that T& operator [](int idx) returns a reference to an array value with index idx and that T operator [](int

问题 I have a template class Array: template <class T=int, int SIZE=10> class Array { T TheArray[SIZE]; public: void Initialize() { for (int idx=0; idx < SIZE; idx++) { TheArray[idx] = T(); } } T& operator [](int idx) { return TheArray[idx]; } T operator [](int idx) const { return TheArray[idx]; } } I have some questions on operator [] overloading (I found this example on net). I understand that T& operator [](int idx) returns a reference to an array value with index idx and that T operator [](int

问题 Possible Duplicate: std::bind overload resolution Consider following C++ example class A { public: int foo(int a, int b); int foo(int a, double b); }; int main() { A a; auto f = std::async(std::launch::async, &A::foo, &a, 2, 3.5); } This gives 'std::async' : cannot deduce template argument as function argument is ambiguous. How do I resolve this ambiguity?? 回答1: Help the compiler resolve ambiguity telling which overload you want: std::async(std::launch::async, static_cast<int(A::*)(int,double