问题描述
在 C# 中，我们可以定义一个泛型类型，该类型对可用作泛型参数的类型施加约束.以下示例说明了通用约束的用法:
In C# we can define a generic type that imposes constraints on the types that can be used as the generic parameter. The following example illustrates the usage of generic constraints:
interface IFoo
{
}
class Foo<T> where T : IFoo
{
}
class Bar : IFoo
{
}
class Simpson
{
}
class Program
{
static void Main(string[] args)
{
Foo<Bar> a = new Foo<Bar>();
Foo<Simpson> b = new Foo<Simpson>(); // error CS0309
}
}
有没有办法可以对 C++ 中的模板参数施加约束.
Is there a way we can impose constraints for template parameters in C++.
C++0x 对此有本机支持，但我说的是当前的标准 C++.
C++0x has native support for this but I am talking about current standard C++.
推荐答案
正如其他人提到的，C++0x 正在将其内置到语言中.在那之前，我会推荐 Bjarne Stroustrup 的 模板约束建议.
As someone else has mentioned, C++0x is getting this built into the language. Until then, I'd recommend Bjarne Stroustrup's suggestions for template constraints.
Boost 也有一个 自己的替代品.
Edit2:看起来 概念已从 C++ 中删除0x.
Looks like concepts have been removed from C++0x.
这篇关于模板约束 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跟版网！