Essential Guide to Managed Extensions for C++ by Siva Challa, Artur Laksberg

By Siva Challa, Artur Laksberg

  • Features how one can write .NET functions utilizing C++, and the way to combine unmanaged and controlled C++ code within the comparable program
  • Details whilst and why to exploit unmanaged code in .NET advancements
  • Includes code samples with unique reasons in each bankruptcy

The Essential advisor to controlled Extensions for C++ is a accomplished advisor for programmers writing code in controlled Extensions for C++ (MC++). the knowledge during this booklet comes instantly from the horse's mouth—both authors were key participants of the visible C++ .NET compiler improvement group and feature spent such a lot in their time enforcing the language and teaching others approximately controlled C++.

The ebook is split into components. half One covers the fundamentals of MC++. It begins with an creation to MC++, and provides a quick assessment of the .NET Framework. subsequent, it delves without delay into some of the gains of MC++, together with controlled sessions, interfaces, worth varieties, homes, enumerations, tips, arrays, operators, delegates, attributes, occasions, and exceptions.

Part of the ebook is dedicated to the transition among the controlled and unmanaged worlds. It begins with a basic creation to interoperability among controlled and unmanaged code. the subsequent chapters describe the Platform Invoke provider, interoperability among COM and .NET, and numerous information marshaling recommendations. The final bankruptcy of half exhibits how MC++ can be utilized to jot down interoperability layers over present elements with minimum overhead.

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The keyword _gc is used to define or declare gc classes. exe The output of the program is as follows: Hello, from gc class! In this example, the class ManagedCpp is annotated with the _gc keyword to make it a gc class. The MC++ compiler automatically adds the class System: : Object as the base class of all gc classes. The public member function Hello prints the string Hello, from gc class!. The prefix 5 before the string indicates that it is a managed string. More on different string notations later in this chapter.

You saw how inheritance works with managed classes. We described how the keywords _abstract, _ typeof, and _ sealed are used on gc classes. Finally, we discussed the special string classes System: : String and System: :Text: : StringBuilder. In the next chapter, we discuss interfaces and show how gc classes are used to implement interfaces.

It has the same accessibility as the Outer class. As a result, the statement that creates an instance of the Inner class in the main function is allowed. dll> using names pace Systemj public __gc class Outer { public: __gc class Inner { public: void InnerFunc() { Console::WriteLine(L"Outer::Inner::InnerFunc()")j } }j void OuterFunc() { Console::WriteLine(L"Outer::OuterFunc()")j } }j int maine) { Outer *0 = new Outer()j Outer::Inner *i = new Outer::Inner()j 0- >OuterFunc 0 j i->InnerFuncO j } The output of the preceding program is as follows: Outer::OuterFunc() Outer::Inner::InnerFunc() 37 Chapter 3 Nested types can inherit from enclosing types.

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