circular-dependency

问题 Closed . This question is opinion-based. It is not currently accepting answers. Want to improve this question? Update the question so it can be answered with facts and citations by editing this post. Closed 5 years ago . I need to know why we need to avoid circular dependencies? In the real world if we think, circular dependencies are pretty much important. Like one friend needs something from other friend and the other needs something from this friend, so its kind of circular right? Then why

问题 I want to know if there is a way to idiomatically avoid issues with circular dependencies with Node.js's require while using CoffeeScript classes and super . Given the following simplified CoffeeScript files: a.coffee: C = require './c' B = require './b' class A extends C b: B someMethod: -> super module.exports = A b.coffee: C = require './c' A = require './a' class B extends C a: A someMethod: -> super module.exports = B The first obvious issue here is that there is a circular dependency

问题 I have this file: A.h struct B; struct A { A(... B &b) : b(b) {} B &b; }; And B.h : #include "A.h" struct B{ ... std::vector<A> as; } And this code: std::vector<A> manya; std::vector<B> bs; //fill bs for(size_t i=0; i<bs.size(); i++) manya.insert(manya.end(), bs[i].as.begin(), bs[i].as.end()); However, I get this error (where A=FindAffineShapeArgs and B=Wrapper ): /usr/include/c++/5/bits/stl_algobase.h(564): error: function "FindAffineShapeArgs::operator=(const FindAffineShapeArgs &)"

问题 I have a set of classes implementing the curiously recurring template pattern. However, the trick is that the base class needs to return instances of the subclasses. Here's an example: template <typename SubType> class ArithmeticBase { public: template <typename OtherType> const Addition operator+(const OtherType &other) {return Addition(get_subclass(), other);} // ... // Operators for subtraction, multiplication, division, ... private: const SubType &get_subclass() const {return *static_cast

问题 This question already has answers here : Resolve build errors due to circular dependency amongst classes (11 answers) Why aren't my include guards preventing recursive inclusion and multiple symbol definitions? (3 answers) Closed 6 years ago . Main.cpp #include "Test1.h" #include "Test2.h" int main(){ Test1 t1; Test2 t2; t1.process(t2); t2.process(t1); } Test1.h #ifndef TEST1 #define TEST1 #include "Test2.h" class Test1 { public: void process(const Test2& t) {}; }; #endif // !TEST1 Test2.h

问题 I use forward declaration but still get ERROR: 'link' does not name a type. Why? struct link; struct node { link *head_link; <------- this is the error location node *next_node; }; struct link { link *next_link; node *connect_node; }; 回答1: You declare a type called struct link, it's not just link, so write: struct node { struct link *head_link; struct node *next_node; }; Alternatively, declare a type called link with a typedef . 来源： https://stackoverflow.com/questions/18009716/forward

问题 This is more a best practice question than a language question in itself, since I already have a working solution to what seems to be a common stumbling block in C++. I'm dealing with a typical cyclic dependency issue in template parameter substitutions. I have the following pair of classes: template<class X> class A { /* ... */ }; template<class X> class B { /* ... */ }; and I want to instantiate each one as the following: // Pseudocode -- not valid C++. A<B> a; B<A> b; that is, I want to

问题 I'm working on an iOS project that was done few years back in Objective C. So I've to implement some new features to the existing one, so this time I'm using Swift for that purpose. I've added a new Swift class: class CampView: UIView { // Code } I want to access this class in one of my existing Objective C class. So I did like: @class CampView; @interface NewCampViewController : UIViewController @property (nonatomic, strong) IBOutletCollection(CampView) NSArray *campTypes; @end But when I

问题 suppose i have an interface called ITestService with it's paired implementation, lets call it DefaultTestService in Assembly "A". I register DefaultTestService class as ITestService service in Autofac container. On the other hand assembly "A" has a reference to assembly "B".now I want to resolve DefaultTestService through it's corresponding interface (ITestService) in assembly "B", for doing this first I have to add reference to assembly "A" so that I can access and pass ITestService to

问题 I am using windsor castle as my IoC container, and has run in to a bit of a problem. First of all - i know about: Castle Windsor: How to prevent circular references in factory-created objects were the created objects refers back to the factory But since circular reference is considered as "Code Smell" and i should consider refactoring app architecture i am asking anyway. I have very similar situation: public class OperationsFactory { private GeneralSettingsManager m_generalSettings; private