The Three Steps in Overload Resolution in .NET framework

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Consider the following set of functions and function call:
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void f(); void f(int); void f(int, int); void f(double, double = 314); f(56); // callsvoid f(double, double)
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Candidate Functions
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The first step of function overload resolution identifies the set of overloaded functions By considered for the StanleyThe functions in this set are the candidate functions A candidate call B Lippman,Jos e Lajoie, Barbara E Moo function is a function with the same name as the function that is called and for which a declaration is visible at the point of the call In this example, there are four candidate functions namedPublisher:Addison Wesley f
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Professional Pub Date: February 14, 2005 Print ISBN: 0-201-72148-1 the Viable Functions Pages: 912 C++ Primer, Fourth Edition
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Determining
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Table of Contents | Index
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The second step selects the functions from the set of candidate functions that can be called with the arguments specified in the call The selected functions are the viable functions To be viable, a function must meet two tests First, the function must have the same number of This popular tutorial introduction to standard C++ has been completely updated, reorganized, and rewritten to help parameters as there are arguments in the call Second, the type of each argument must programmers convertible tothe and use in corresponding parameter matchor belearn the language fastertype of itits a more modern, effective wayJust as C++ has evolved since the last
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edition, so has the authors' approach to teaching it They now introduce the C++ standard library from the beginning, giving readers the means to write useful programs without first having to master every language detail Highlighting today's best practices, they show how to write programs that are safe, can be built quickly, and yet offer outstanding performance Examples that take advantage of the library, and explain the features of C++, also show how to make the best use of the language As in its previous editions, the book's authoritative discussion of fundamental C++ concepts and techniques makes When a more experienced programmersProgram (Section 741, p 253), a it a valuable resource even forfunction has default arguments Faster and More Effectively with This Rewritten call quicker learning, using the fewer arguments than it actually does Classic Restructured for may appear to have C++ standard library Updated to teach the most current programming styles and programDefault arguments with new learning aids that are treated the same way about common design techniques Filled are arguments and emphasize important points, warn as any other argument during function matching pitfalls, suggest good programming practices, and provide general usage tips Complete with exercises that reinforce skills learned Authoritative and comprehensive in its coverageThe source code for the book's extended examples is available on the Web at the address below
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For the call f(56), we can eliminate two of our candidate functions because of a mismatch on number of arguments The function that has no parameters and the one that has two int parameters are not viable for this call Our call has only one argument, and these functions have zero and two parameters, respectively On the other hand, the function that takes two doubles might be viable A call to a function declaration that has a default argument (Section 741, p 253) may omit that argument The compiler will automatically supply the default argument value for the omitted argument Hence, a given call might have more arguments than appear explicitly Having used the number of arguments to winnow the potentially viable functions, we must now look at whether the argument types match those of the parameters As with any call, an argument might match its parameter either because the types match exactly or because there is a conversion from the argument type to the type of the parameter In the example, both of our remaining functions are viable
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f(int) is a viable function because a conversion exists that can convert the argument of typedouble to the parameter of type int f(double, double) is a viable function because a default argument is provided for the function's second parameter and its first parameter is of type double, which exactly
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