传递不同类型的参数的可变数目 - C ++

问题描述

我用C ++编写代码，并且有几个关于省略号的问题：

I am coding in C++ and have a few questions regarding the ellipsis:

1. 类指针到省略号？

1. Is it possible to pass in class or class pointer into the ellipsis?

基本上我想做的是在 char * 和 class 。我现在使用省略号，并试图找出如何传入类。如果省略号在这里不适用，有什么可用的选项？

Basically what I want to do is to pass in variable number of arguments in the type of char* and class. I am using ellipsis currently and trying to figure out how to pass in the class. If ellipsis isn't applicable over here, what are the options available?

我想让用户直接使用 func（params 1， params2，...），在将向量或数组作为参数传递给函数之前，首先不必显式地将参数赋值为向量或数组。

I want to let the user to directly call the function using func( params 1, params2, ...) without explicitly assigning the params into a vector or array first before passing the vector or array as argument to the function.

推荐答案

您应该考虑使用可变函数（C风格）是一个危险的缺陷。
如果传递给函数的对象不匹配，类型等待，或者如果你没有放置正确的参数数量，那么你在运行时基本上会暴力崩溃。

You should consider that using variadic functions (C-style) is a dangerous flaw.If the objects passed to the function mismatch the type awaited, or if you don't put the exact number of parameters awaited, then you basically have a violent crash at runtime.

在Bjarne Stroustrup C ++ In Depth系列 - C ++编码标准 - 101 Herb Sutter和Andrei Alexandrescu的规则，指南和最佳实践，第98章：不要使用varargs （省略号）

In Bjarne Stroustrup C++ In Depth Series - C++ Coding Standards - 101 Rules, Guidelines, And Best Practices by Herb Sutter and Andrei Alexandrescu, chapter 98: Don't use varargs (ellipsis)

我深深地订阅了@ tenfour的建议：

I deeply subscribe to @tenfour's proposal:

• 使用包含所有参数的 std :: vector 。

• use an std::vector that contains all your parameters.

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