自动添加具有CV资格的功能 [英] Automaticly add CV-qualified functions

问题描述

我有下一堂课

class Parameter
{
private:
    T value_;

public:
    // Get
    T& value()                                 { return value_; }
    volatile T& value() volatile               { return value_; }
    const T& value() const                     { return value_; }
    const volatile T& value() volatile const   { return value_; }
}

如何最大程度地减少行数和代码量.我想编写一次T& value()并自动实现CV认证版本.可能吗?

How can I minimize number of lines, amount of code. I want to write once T& value() and achieve CV-qualified versions automatically. Possible?

推荐答案

是的，您可以使用宏，但是我看不到这样的用法:

Yes, you could use macro, but I can't see any use of such:

#define IDK_WHY(returnType, functionName, functionArgs, functionBody) \
                   returnType functionName functionArgs                functionBody \
    volatile       returnType functionName functionArgs volatile       functionBody \
    const          returnType functionName functionArgs const          functionBody \
    const volatile returnType functionName functionArgs volatile const functionBody

class Parameter
{
    using T = int; //for testing, dunno what is T in your code
private:
    T value_;

public:
    // note you can't use comma in last argument, it would require more complex macro
    IDK_WHY(T&, value, (), { return value_;}) //done
};

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