In general, you can’t – Rust does not support variadic functions, except when interoperating with C code that uses varargs. In this case, since all of your arguments are the same type, you can accept a slice: fn foo(args: &[&str]) { for arg in args { println!(“{}”, arg); } } fn main() { foo(&[“hello”, “world”, … Read more
Overall approach and usage The overal approach consists in packing the arguments into an std::tuple of references, exploiting the perfect forwarding machinery of std::forward_as_tuple(). This means that, at run-time, you should incur in very small overhead and no unnecessary copy/move operations. Also, the framework does not use recursion (apart from compile-time recursion, which is unavoidable … Read more
Append :_* to the parameter in test like this test(some:_*) And it should work as you expect. If you wonder what that magical :_* does, please refer to this question.
What these are called, generally, is “variadic functions” (or methods, as it were). To create this, simply end your method declartion with , …, as in – (void)logMessage:(NSString *)message, …; At this point you probably want to wrap it in a printf-like function, as implementing one of those from scratch is trying, at best. – … Read more
There are 3 phases used in overload resolution (JLS 15.2.2): The first phase (§15.12.2.2) performs overload resolution without permitting boxing or unboxing conversion, or the use of variable arity method invocation. If no applicable method is found during this phase then processing continues to the second phase. The second phase (§15.12.2.3) performs overload resolution while … Read more
You can’t. You have to manage for the caller to indicate the number of arguments somehow. You can: Pass the number of arguments as the first variable Require the last variable argument to be null, zero or whatever Have the first argument describe what is expected (eg. the printf format string dictates what arguments should … Read more
The C and C++ standard do not have any requirement on how it has to work. A complying compiler may well decide to emit chained lists, std::stack<boost::any> or even magical pony dust (as per @Xeo’s comment) under the hood. However, it is usually implemented as follows, even though transformations like inlining or passing arguments in … Read more
Just wrap your primitives in a simple container and pass that as a parameter to AsyncTask, like this: private static class MyTaskParams { int foo; long bar; double arple; MyTaskParams(int foo, long bar, double arple) { this.foo = foo; this.bar = bar; this.arple = arple; } } private class MyTask extends AsyncTask<MyTaskParams, Void, Void> { … Read more
Every instance of that oddity is paired with a case of a regular single ellipsis. template<typename _Res, typename… _ArgTypes> struct _Weak_result_type_impl<_Res(_ArgTypes…)> { typedef _Res result_type; }; template<typename _Res, typename… _ArgTypes> struct _Weak_result_type_impl<_Res(_ArgTypes……)> { typedef _Res result_type; }; template<typename _Res, typename… _ArgTypes> struct _Weak_result_type_impl<_Res(_ArgTypes…) const> { typedef _Res result_type; }; template<typename _Res, typename… _ArgTypes> struct _Weak_result_type_impl<_Res(_ArgTypes……) … Read more
Only one vararg, sorry. But using asList() makes it almost as convenient: public void myMethod(List<Integer> args1, List<Integer> args2) { … } ———– import static java.util.Arrays.asList; myMethod(asList(1,2,3), asList(4,5,6));