std::sub_match<BidirIt>::operator string_type, std::sub_match<BidirIt>::str
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
#include <cassert>
#include <iostream>
#include <regex>
#include <string>
int main()
{
const std::string html{R"("<a href="https://cppreference.com/">)"};
const std::regex re{"(http|https|ftp)://([a-z]+)\\.([a-z]{3})"};
std::smatch parts;
std::regex_search(html, parts, re);
for (std::ssub_match const& sub : parts)
{
const std::string s = sub; // (1) implicit conversion
assert(s == sub.str()); // (2)
std::cout << s << '\n';
}
}Output:
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https://en.cppreference.com/w/cpp/regex/sub_match/str