Varianti

    std::match_results::size

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    <metanoindex/>

     
    C++
     
    Espressioni regolari libreria
    Classi
    Original:
    Classes
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    basic_regex(C++11)
    sub_match(C++11)
    match_results(C++11)
    Algoritmi
    Original:
    Algorithms
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    regex_match(C++11)
    regex_search(C++11)
    regex_replace(C++11)
    Iteratori
    Original:
    Iterators
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    regex_iterator(C++11)
    regex_token_iterator(C++11)
    Eccezioni
    Original:
    Exceptions
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    regex_error(C++11)
    Tratti
    Original:
    Traits
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    regex_traits(C++11)
    Costanti
    Original:
    Constants
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    syntax_option_type(C++11)
    match_flag_type(C++11)
    error_type(C++11)
     
    std::match_results
    Membri funzioni
    Original:
    Member functions
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    match_results::match_results
    match_results::~match_results
    match_results::operator=
    match_results::get_allocator
    Stato
    Original:
    State
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    match_results::ready
    Elemento accesso
    Original:
    Element access
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    match_results::size
    match_results::max_size
    match_results::empty
    match_results::length
    match_results::position
    match_results::str
    match_results::operator_at
    match_results::prefix
    match_results::suffix
    Iteratori
    Original:
    Iterators
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    match_results::begin
    match_results::cbegin
    match_results::end
    match_results::cend
    Formato
    Original:
    Format
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    match_results::format
    Modificatori
    Original:
    Modifiers
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    match_results::swap
     
    <tbody> </tbody>
    size_type size() const;
    		 (dal C++11)
    Restituisce il numero di sottocorrispondenze, vale a dire std::distance(begin(), end()).
    Original:
    Returns the number of submatches, i.e. std::distance(begin(), end()).
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    Parametri

    (Nessuno)
    Original:
    (none)
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    Valore di ritorno

    Il numero di sottocorrispondenze
    Original:
    The number of submatches
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    Eccezioni

    noexcept specification:  
    <tbody> </tbody>
    noexcept
      (dal C++11)

    Complessità

    Constant
    Original:
    Constant
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    Vedi anche

    Esempio

    #include <iostream>
#include <regex>
#include <string>

int main()
{
    std::regex re("a(a)*b");
    std::string target("aaab");
    std::smatch sm;

    std::regex_match(target, sm, re);
    std::cout << sm.size() << '\n';
}

    Output: 

    2