如何在 C++ 中为模板化函数创建宏

Posted 2023-02-22

【中文标题】如何在 C++ 中为模板化函数创建宏

【英文标题】：How to create a macro for a templated function in c++

【发布时间】：2016-10-04 10:10:05

【问题描述】：

我想为模板函数创建一个宏

#define CHECK_MIN(T)(value, target) checkmin(T value, T target) \
checkmin<T>(T val, T target, __FUNCTION__, __LINE__)

template<typename T> checkmin(T val, T target, const char* functionName, long lineNumber)

    // Check if the val is less than target
    // Construct a std::string using the function name and line name
    // throw std:: exception passing the string constructed above.

我无法获得实现此目的的语法。有任何想法吗？

【参考方案1】：

您可以通过以下方式进行：

#include <iostream>
using namespace std;

template<typename T>
 void  checkmin(T val, T target, const char* functionName, long lineNumber)
 
   // Check if the val is less than target
   // Construct a std::string using the function name and line name
   // throw std:: exception passing the string constructed above.
 

#define CHECK_MIN(value, target)  \
 checkmin(value,target, __FUNCTION__, __LINE__);

int main() 
    /*Not using new in object definitions so I don't have to delete them afterwards since pointers don't stay in memory*/
    CHECK_MIN(5,6);

     return 0;