为什么函数不能被返回类型重载?
可能的重复:
按返回类型重载函数?
谜题:根据返回值重载一个C++函数
因为我有一个库，它以以下形式公开了一堆函数:
Because I have a library which exposes a bunch of functions in the form of:
bool GetVal();
double GetVal();
int GetVal();
long GetVal();
//So on.
现在我必须包装这些.我宁愿不再重写同一组函数.我想做类似的事情
And now I have to wrap these. I'd rather not rewrite the same set of functions again. I'd like to do something like
template<class T>
T GetVal(){}
但我似乎无法让它工作.有什么想法吗?
But I can't seem to get this working. Any ideas?
推荐答案
您不能重载返回类型，因为在函数调用表达式中使用函数的返回值不是强制性的.
You can't overload on return types as it is not mandatory to use the return value of the functions in a function call expression.
例如，我可以说
GetVal();
编译器现在做什么?
相关文章