stdstring - Value and size of an uninitialized std::string variable in c++

Question

If a string is defined like this

std::string name;

What will be the value of the uninitialized string "name" and what size it would be?

question from:https://stackoverflow.com/questions/17738439/value-and-size-of-an-uninitialized-stdstring-variable-in-c

Answer 1

Because it is not initialized, it is the default constructor that is called. Then :

empty string constructor (default constructor) :

Constructs an empty string, with a length of zero characters.

Take a look : http://www.cplusplus.com/reference/string/string/string/

EDIT : As stated in C++11, §21.4.2/1 :

E?ects: Constructs an object of class basic_string. The postconditions of this function are indicated in Table 63.

-> Table 63
+-----------------------------------------------------------------------------+
| data()     | a non-null pointer that is copyable and can have 0 added to it |
+------------+----------------------------------------------------------------+
| size()     | 0                                                              |
+------------+----------------------------------------------------------------+
| capacity() | an unspeci?ed value                                            |
+-----------------------------------------------------------------------------+