std::match_results::length

 

C++

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Utilities library

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Numerics library

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Regular expressions library (C++11)

Atomic operations library (C++11)

Thread support library (C++11)

 

Regular expressions library

Classes

basic_regex (C++11)

sub_match (C++11)

match_results (C++11)

Algorithms

regex_match (C++11)

regex_search (C++11)

regex_replace (C++11)

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regex_iterator (C++11)

regex_token_iterator (C++11)

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regex_error (C++11)

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regex_traits (C++11)

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syntax_option_type (C++11)

match_flag_type (C++11)

error_type (C++11)

 

std::match_results

Member functions

match_results::match_results (C++11)

match_results::~match_results (C++11)

match_results::operator= (C++11)

match_results::get_allocator (C++11)

State

match_results::ready (C++11)

Element access

match_results::size (C++11)

match_results::max_size (C++11)

match_results::empty (C++11)

match_results::length (C++11)

match_results::position (C++11)

match_results::str (C++11)

match_results::operator_at (C++11)

match_results::prefix (C++11)

match_results::suffix (C++11)

Iterators

match_results::begin match_results::cbegin (C++11)

match_results::end match_results::cend (C++11)

Format

match_results::format (C++11)

Modifiers

match_results::swap (C++11)

 

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 nth sub-match is returned.

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

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

Parameters

n

-

integral number specifying which match to examine

Return value

The length of the specified match or sub-match.

See also

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