C# 空合并运算符等效于 C++ [英] C# null coalescing operator equivalent for c++

问题描述

是否有 C# 空合并运算符的 C++ 等效项?我在我的代码中做了太多的空检查.所以一直在寻找一种方法来减少空代码的数量.

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

在 C++ 中默认没有办法做到这一点，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 ??运算符定义为

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;
}

这篇关于C# 空合并运算符等效于 C++的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！