C＃空合并运算符相当于C ++ [英] C# null coalescing operator equivalent for c++

问题描述

有一个C ++相当于C＃空合并运算符？我在我的代码做太多null检查..所以一直在寻找一种方式，以减少无效的代码

is there a C++ equivalent for C# null coalescing operator? i am doing too many null checks in my code.. so was looking for a way to reduce the amount of null code

推荐答案

没有办法在默认情况下在C ++中做到这一点，但你可以写一个：

There isn't a way to do this by default in C++, but you could write one:

在C＃中？运营商被定义为

in C# the ?? operator is defined as

a ?? b === (a != null ? a : b)

所以，C ++方法看起来像

So, the C++ method would look like

Coalesce(a, b) // put your own types in, or make a template
{
    return a != null ? a : b;
}

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