The collision is actually with Object.equals(). All classes are inherited from Object and therefore have the Object.equals() method which leads to this collision. You’re importing by name, not by signature. You actually can’t import a static method named equals because of this. Or rather, you can import it, but not use it. I do agree … Read more
You’ve got to be compiling with the iOS 6 or OS X 10.8 SDKs — otherwise Foundation objects don’t have the necessary methods for the subscripting bit of the literal syntax.* Specifically in this case, the subscripting expects objectAtIndexedSubscript: to be implemented by NSArray, and that’s a new method that was created to interact with … Read more
X::A a; f(a); works because of Argument-Dependent Lookup (Also known as Koenig Lookup). a is an object of class A inside namespace X, when compiler searches a match-able function f, it will look into namespace X in this case. See Argument Dependent Lookup for more information.
First of all, you need an array, not a pointer. static const char * const days[] = {“mon”, “tue”, “wed”, “thur”, “fri”, “sat”, “sun”}; Second of all, you can’t initialize that directly inside the class definition. Inside the class definition, leave only this: static const char * const days[]; //declaration Then, in the .cpp file, … Read more
So, can somebody please help me understand why leveraging the same overload inside of those other methods is failing with that error? Precisely because you’re using a dynamic value (param) as one of the arguments. That means it will use dynamic dispatch… but dynamic dispatch isn’t supported for extension methods. The solution is simple though: … Read more
I’ve been working on a multi-platform game engine and I faced same issue only on Linux. If you are using cmake add following to your cmake file: SET(CMAKE_CXX_FLAGS “${CMAKE_CXX_FLAGS} -pthread”) If you are not using cmake you need to add this flag for your compiler manually. The complete cmake for using threads in linux systems … Read more
Try this: public delegate void MoveDelegate(object o); public static MoveDelegate MoveMethod; So the method-variable can be defined static. The keyword static has no meaning for the delegate definition, just like enum or const definitions. An example of how to assign the static method-field: public class A { public delegate void MoveDelegate(object o); public static MoveDelegate … Read more
Let’s look at a list of options starting with the worst and moving to the best. We’ll list them here and discuss them below: transform(cbegin(s), cend(s), begin(s), ::tolower) transform(cbegin(s), cend(s), begin(s), static_cast<int(*)(int)>(tolower)) transform(cbegin(s), cend(s), begin(s), [](const unsigned char i){ return tolower(i); }) The code in your question, transform(s.begin(), s.end(), s.begin(), tolower) will produce an error … Read more
The literal 0 has two meanings in C++. On the one hand, it is an integer with the value 0. On the other hand, it is a null-pointer constant. As your setval function can accept either an int or a char*, the compiler can not decide which overload you meant. The easiest solution is to … Read more