new-operator

The following code works under gcc versions 2.9 through 4.4 but not version 4.5: struct Pass { }; int main(void){ Pass **passes = new ( Pass (*[ 10 ]) ); } The specific error message with gcc 4.5 is: prob.cc: In function ‘int main()’: prob.cc:6:31: warning: lambda expressions only available with -std=c++0x or -std=gnu++0x prob.cc:6:38: error: no matching function for call to ‘Pass::Pass(void (&)())’ prob.cc:2:1: note: candidates are: Pass::Pass() prob.cc:2:1: note: Pass::Pass(const Pass&) Adding the requested flag silences the initial warning but does not fix the issue. Could someone explain

This question already has an answer here: How to fix JSLint “missing new” error 2 answers Let's say I have some JavaScript that looks like this: function A() { var MyVar, SomeParameter; // do work MyVar = FunctionB(SomeParameter); } JsLint says I'm Missing 'new'. at the line MyVar = FunctionB(SomeParameter); Why should I rewrite as MyVar = new FunctionB(SomeParameter); Is there going to be any benefit? It is the convention that constructors (eg: Array , Object ) are starting with a capital. JSLint complains, because it thinks that you're trying to use a constructor, without new keyword. To fix

I have created a new project called auth using react-native init auth at terminal.When i tried to run the project using react-native run-ios. The build failed and gave a error 'React/RCTBridgeDelegate.h' file not found. Tried to update the react native version react-native run-ios at terminal in mac I expect the build to be successful and see the ios simulator The actual result which i got is build failed and hence cant see the simulator The issue is related to cocoapods dependency manager . open the terminal and then go to your project ios director, and then type "pod init" (If it doesn't

I'm bit confused by "easy" working with ruby on rails, cause I already spend three days by trying create an app. I work on site5 hosting, and try to create new app. step by step: $ rails new app -d mysql $ gem install mysql $ gem install mysql2 and after $ rake db:create it report about error Could not find gem 'mysql2 (~> 0.2.6, runtime)' in any of the gem sources listed in your Gemfile. I google it, but still can't fix problem. Can anybody help? Running rails new app -d mysql will automatically add the required gems to your Gemfile, so you shouldn't need to install them manually with the gem

If I were to wanted to parameterize creating an object, I could of course make a function which called new on a particular class and passed out a pointer. I am wondering if it's possible to skip that step and pass a function pointer to the new operator itself. boost::lambda provides function wrappers for new and delete . These can be used to easily convert an new call into a function object. operator new (as well as the other flavours) takes care of allocating memory but does not construct objects. In fact its return type is void* . What constructs an object is a new expression , which is part

Occasionaly, I've made a typo in one place of code of my program: int a = 10; char* b = new char(a); Error is obvious: I've written () instead of []. The strange thing is... code compiled ok, it ran in debugger ok. But compiled .exe outside of debugger crashed a moment after function with these lines was executed. Is second line of code really legitimate? And if it is, what does it mean to compiler? It's a single char with the numerical value of a , in this case 10 . Pointers don't only point to arrays, y'know. You're allocating a single char and assigning it a value from a . It's not

I have a stateless, abstract base class from which various concrete classes inherit. Some of these derived classes are stateless as well. Because many of them are created during a run, I'd like to save memory and overhead by having all stateless derived classes emulate a singleton, by overriding operator new()/delete(). A simplified example would look something like this: #include <memory> struct Base { virtual ~Base() {} protected: Base() {} // prevent concrete Base objects }; struct D1 : public Base { // stateful object--default behavior int dummy; }; struct D2 : public Base { // stateless