std::match_results<BidirIt,Alloc>::length

difference_type length( size_type n = 0 ) const;		(since C++11)

Returns the length of the specified sub-match.

If n == 0, the length of the entire matched expression is returned.

If n > 0 && n < size(), the length of n^th sub-match is returned.

if n >= size(), a length of the unmatched match is returned.

The call is equivalent to (*this)[n].length().

n

-

integral number specifying which match to examine

The length of the specified match or sub-match.

operator[]	returns specified sub-match (public member function) [edit]
length	returns the length of the match (if any) (public member function of `std::sub_match<BidirIt>`) [edit]

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)
Metaprogramming library (C++11)
Diagnostics library
General utilities library
Strings library
Containers library
Iterators library
Ranges library (C++20)
Algorithms library
Numerics library
Localizations library
Input/output library
Filesystem library (C++17)
Regular expressions library (C++11)
Concurrency support library (C++11)
Execution support library (C++26)
Technical specifications
Symbols index
External libraries

Member functions
match_results::match_results
match_results::~match_results
match_results::operator=
match_results::get_allocator
State
match_results::ready
Element access
match_results::size
match_results::max_size
match_results::empty
match_results::length
match_results::position
match_results::str
match_results::operator[]
match_results::prefix
match_results::suffix
Iterators
match_results::beginmatch_results::cbegin
match_results::endmatch_results::cend
Format
match_results::format
Modifiers
match_results::swap
Non-member functions
operator==operator!= (until C++20)
swap(std::match_results)