/grid/cva/p4_02/hisham/gcc/ua/Framework/Roman/src/HelperFunction.h:34:6: error:
我在头文件(HelperFunction.h)中有一个函数声明,如下所示:
template<typename Lambda,typename... Args>
void timeFunction(Lambda lambda, Args... args);
该函数在HelperFunction.cpp文件中的定义如下:
template<typename Lambda, typename... Args>
void timeFunction(Lambda lambda,Args... args) {
std::chrono::high_resolution_clock::time_point t1 = std::chrono::high_resolution_clock::now();
function(args...);
std::chrono::high_resolution_clock::time_point t2 = std::chrono::high_resolution_clock::now();
auto duration = std::chrono::duration_cast<std::chrono::microseconds>(t2 - t1).count();
std::cout << duration;
}
主要功能如下:
#include "HelperFunction.h"
int main(){
auto lambda=[](){trial();};
timeFunction(lambda);
}
但是出现以下错误:
'void timeFunction(Lambda, Args ...) [with Lambda = main()::<lambda()>; Args = {}]', declared using local type 'main()::<lambda()>', is used but never defined [-fpermissive]
void timeFunction(Lambda lambda, Args... args);
^~~~~~~~~~~~
/grid/cva/p4_02/hisham/gcc/ua/Framework/Roman/src/HelperFunction.h:34:6: error: 'void timeFunction(Lambda, Args ...) [with Lambda = main()::<lambda()>; Args = {}]' used but never defined [-Werror]
cc1plus: all warnings being treated as errors
我只是试图创建一个函数,该函数将使用另一个函数的参数并获取返回所需的毫秒数。尽管进行了研究,但我无法识别错误的含义。它说函数已使用但从未在错误中定义,但我确实定义了它。