This question already has answers here: What are forward declarations in C++? (8 answers) Closed 5 y开发者_JAVA技巧ears ago.
Can anyone give example of forward declaration in objective C for a normal class and not for category or pr开发者_StackOverflowotocol?/*
// This is a header file. class MyClass; // It can be forward declared because the function uses reference.
So as part of a large hobby learning project I have implemented a mostly complete smart pointer implementation.It does practically every thing I ask of it, except for one minor detail that may prove t
The following code does not compile in Visual Studio 2008. How do I get it to allow a unary operator in the Foo1 class that converts开发者_StackOverflow社区 it to a Bar, when Foo1 is defined before Ba
This compiles fine, although I wouldn\'t want to try running it just yet. However ... //class base; //class derived;
I have 2 classes: A and B. Some methods of class A need to use class B and the opposite(class B has methods that need to use class A).
This one made me think: class X; void foo(X* p) { delete p; } How can we possibly delete p if we do not even know whether X has visible destructor? g++ 4.5.1 gives three warnings:
What\'s the <iosfwd> header used for? Why is it necessary?开发者_JAVA技巧 Any example?It\'s so you can declare, in your own headers, methods that rely on the declarations of iostream types with
I\'m getting an error below in the class a declaring a new pointer of type b. Please help. #include <iostream>
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