wrapper

BACKGROUND : I am trying to implement a tiny template, i.e. generic class, which would allow me to achieve a pass-by-reference functionality as follows. public static class Ref<T> { T value; public Ref(T InitValue) { this.set(InitValue); } public void set(T Value) { this.value = Value; } public T get() { return this.value; } } So, I could define a function that takes a 'Ref' where the value can actually be changed, e.g. public static void function(Ref<Byte> x) { x.set((byte)0x7E); } The initialization of the variable to be passed by reference looks not so elegant. Ref<Byte> to_be_changed = new

What is the difference between int and Integer . Yes, one is primitive and another one is wrapper , what is the situation to use them correctly. Also what is the difference between : int i=0; ++i and i++ part 1 One example .. you can use Integer as the key of HashMap but you can't use int. Because an Object is needed. So where you need an int value as an object there you need to use Integer class. part 2 ++i is pre increment i++ is post increment for example i = 0; System.out.println(i++) //will print 0 then the i will be 1. and i = 0; System.out.println(++i) // here i wil be incremented first

Given the following C library with a callback event that ask to set a buffer, how to write a proper C++/CLI wrapper in a type safe manner? // The callback signature typedef void (__cdecl *BUFFERALLOCATOR)(void *opaque, void **buffer); // A struct that contains the context of the library struct lib_context_base_s { // The stored callback function pointer BUFFERALLOCATOR buffer_allocator; // Opaque pointer that contain the local context. Needed in C because // C doesn't have closures (functions that knows the context where // they are defined) void* opaque; }; typedef struct lib_context_base_s

As Java 5 have autoboxing, why I can't use Comparator to sort primitives? An int wouldn't be wrapped into a Integer ? Arrays.sort(..) have dedicated overloadings for sorting primitive arrays. If you need any special sorting rules apart from the standard ones, I'm afraid you'd have to use autoboxing. In addition to that, you'd have to transform your array to Integer[] , because int[] is not autoboxed. And if you are not talking about arrays, but about collections - then you have no choice - collections can hold only objects. Because you cannot parameterise a Comparator<T> -- or any other

Windows API So i know that the WinForms touches on the Windows API a little, but frankly its horrible. ESPECIALLY with the layered windows and flickering. So i was wondering if anyone has wrote partial, or full wrappers for the Windows API.Im particularly interested in the Layered Window aspect, but really any part of the API is a good place to start. Update : I found the Windows API Code Pack here: http://code.msdn.microsoft.com/WindowsAPICodePack but it seems that it doesnt wrap Layered Windows? Am i correct in assuming this? Native API (Windows) Ive heard a little bit about the Native API,

I am writing a wrapper routine for write() to override the original system function and within it i need to execute another program through execve() ; for which I include the header file unistd.h . I get the error conflicting types for 'write' /usr/include/unistd.h:363:16: note: previous declaration of 'write'was here . I would be very gratefull if someone could help me out as I need to call another program from inside the wrapper and also send arguments to it from inside the wrapper routine. jschmier An alternative to using the GNU liner --wrap symbol option as suggested by Matthew Slattery

While answering this question I wrote this working code, wrapping function passed in template arguments: template<typename Fn, Fn fn, typename... Args> auto wrapper(Args... args)->decltype(fn(args...)){ return fn(args...); } #define WRAPPER(FUNC) wrapper<decltype(&FUNC), &FUNC> Example usage (I use this code for testing): int min(int a, int b){ return (a<b)?a:b; } #include<iostream> using std::cout; int main(){ cout<<WRAPPER(min)(10, 20)<<'\n'; } Two people told me to use perfect forwarding . When I asked how to do this, one of them redirected me here . I read question, carefully read best