std::sub_match::operatorstring_type,std::sub_match::str (3) Linux Manual Page

ByLinux Manual Posted onApr 30, 2026

std::sub_match<BidirIt>::operatorstring_type,std::sub_match<BidirIt>::str – std::sub_match<BidirIt>::operatorstring_type,std::sub_match<BidirIt>::str

Synopsis

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.

Parameters

(none)

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.

Complexity

Linear in the length of the underlying character sequence.

Example

// Run this code

#include <iostream>

#include <regex>

#include <string>

int main()

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