模板专业化一组类型 [英] template specialization for a set of types

问题描述

我有一个快速问题，如何专门化模板的一组数据类型。例如

i have a quick question on how do I specialize a template for a set of datatypes. for example,

template<typename T>
inline T getRatio(T numer, T denom){
    return (numer/denom);
}

我想要使用int，long，double，float以专门用于此组数据类型。因此如果用户使用'char'类型尝试此函数，编译器将抛出错误。
如果这是一个dup让我知道。
感谢 只要三种数据类型 long 感谢

I want this to work with int, long, double, float so I want to specialize it for this set of datatypes. so that if the user tries this function with a 'char' type, the compiler would throw error. if this is a dup let me know. thanks

推荐答案

， double 和 float 是相关的，他们不需要额外的通用版本，只是拒绝 template 并为 long ， double 和 float 。

As only the three data types long, double and float are relevant and their is no need for an additional generic version, just reject the template and provide three functions for long, double and float.

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