Is there a better way to write a vector of strings as a function's optional parameter?-CodePudding

I have a function where I want a const std::vector<std::string>* parameter to have a default parameter value of nullptr:

// Definition. Includes a default parameter.
void func(std::vector<std::string>* my_strings = nullptr);

// Call site. Is there a better way?
func(&std::vector<std::string>({"abc"}));

Is there a better way to write an optional vector of strings as a parameter?

CodePudding user response：

If func() doesn't need to modify the vector, and you don't need to differentiate between "no vector" and "an empty vector", you could do it this way:

void func(const std::vector<std::string> & my_strings = std::vector<std::string>());

... then you can just call it naturally:

func(std::vector<std::string>({"abc"}));
func();