How to Fix R6025 Pure Virtual Function Call
In the object-oriented programming language C++, a pure virtual function is one that is designed to be inherited by other functions. Software designers typically use virtual functions to create generic functions that are intended to be filled out by specific functions. For example, a virtual function may represent a graphical object with x, y and z coordinates. A “rectangle” function might inherit the virtual function and use the coordinates to draw a rectangle. When you receive the error “R6025,” your program has directly invoked a pure virtual function, which is not allowed.
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Instructions
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Open the Visual Studio 2010 program by clicking on its icon. Load the “Visual C++” project that is giving you the “R6025” error.
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Run the program by pressing the green “Play” button from the Visual Studio toolbar. Attempt to recreate the usage pattern for your software that originally created the “R6025” error. When this error is created, the Visual Studio debugger will stop at the line of code where the pure virtual function was made.
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Examine the code that called the pure virtual function. Pure virtual functions cannot be invoked directly, and can only be accessed through inheriting functions. You have two options: First, you can redesign the code so that it uses an inherited function, rather than a pure virtual function. Second, you can change the pure virtual function into a virtual function. Virtual functions can be invoked directly, although this may undermine specific design goals for your software project.
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