##### cppreference.com

##### Search

Create account

##### Namespaces

- Page
- Discussion

##### Variants

##### Views

- View
- Edit
- History

##### Actions

# std::sub_match::operator string_type, std::sub_match::str

From cppreference.com
< cpp‎ | regex‎ | sub match

operator string_type() const; | (1) |
string_type str() const; | (2) |

Converts to an object of the underlying std::basic_string type.

The first version is an implicit conversion, the second one is explicit.

### [edit] Parameters

(none)

### [edit] Return value

Returns the matched character sequence as an object of the underlying std::basic_string type. If the `matched` member is false then the empty string is returned.

### [edit] Complexity

Linear in the length of the underlying character sequence.

### [edit] Example

Run this code

    std::ssub_match sm;
    std::string s = sm;  // implicit conversion
    std::cout << s.length() << '\n';

Output:

    ​0​

Retrieved from "http://en.cppreference.com/mwiki/index.php?title=cpp/regex/sub_match/str&oldid=62375"