initializing strings as null vs. empty string

Question

How would it matter if my C++ code (as shown below) has a string initialized as an empty string :

std::string myStr = \"\";
....some code to optionally popul         


        

Answer 1

Best:

 std::string subCondition;

This creates an empty string.

This:

std::string myStr = "";

does a copy initialization - creates a temporary string from "", and then uses the copy constructor to create myStr.

Bonus:

std::string myStr("");

does a direct initialization and uses the string(const char*) constructor.

To check if a string is empty, just use empty().