std::sub_match<BidirIt>::sub_match

(C++26)

constexpr sub_match();		(since C++11)

Default constructs a std::sub_match. The matched member is set to false and the inherited members first and second are value-initialized.

This is the only publicly accessible and defined constructor.

Run this code

#include <cassert>
#include <regex>
 
int main()
{
    std::sub_match<const char*> s;
    assert(!s.matched);
}

Compiler support
Freestanding and hosted
Language
Standard library
Standard library headers
Named requirements
Feature test macros (C++20)
Language support library
Concepts library (C++20)
Diagnostics library
Memory management library
Metaprogramming library (C++11)
General utilities library
Containers library
Iterators library
Ranges library (C++20)
Algorithms library
Strings library
Text processing library
Numerics library
Date and time library
Input/output library
Filesystem library (C++17)
Concurrency support library (C++11)
Execution control library (C++26)
Technical specifications
Symbols index
External libraries

Member functions
sub_match::sub_match
sub_match::length
sub_match::strsub_match::operator string_type
sub_match::compare
sub_match::swap
Non-member functions
operator==operator!=operator<<operator<=operator>operator>=operator<=> (until C++20)(until C++20)(until C++20)(until C++20)(until C++20)(C++20)
operator<<