C++/CLI Primer : the visual C++ language of .NET by Gordon Hogenson

By Gordon Hogenson

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And to declare an interface (a concept that does not exist as a specific language feature in C++), one had to use the syntax __interface I { ... }; There were other cases of keywords added with double underscores as well. All in all, the syntax was cumbersome. And not just because of the double underscores, but also because Managed Extensions for C++ did not provide natural support for several key concepts of the CLR, such as properties, events, automatic boxing, and so on. All this meant that C++ programmers did not enjoy programming in Managed Extensions for C++.

The indexed property Position is implemented with what looks like array indexing syntax. Vector properties take a value in square brackets and use that value as an index to determine what value is returned. Also notice that we use the property names just like fields in the rest of the body of the class. This is what makes properties so convenient. In assignment expressions, property get and set methods are called implicitly as appropriate when a property is accessed or is assigned to. ) and the postfix or prefix operators with properties to simplify the syntax in some cases.

Pos = gcnew array(3); pos[0] = x; pos[1] = y; pos[2] = z; } // The rest of the class declaration is unchanged. }; So we have a ref class Atom with a managed array, and the rest of the code still works. In the managed type system, the array type is a type inheriting from Object, like all types in the CTS. Note the syntax used to declare the array. We use the angle brackets suggestive of a template argument to specify the type of the array. Don’t be deceived—it is not a real template type.

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