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std::match_results::size

提供: cppreference.com
< cpp‎ | regex‎ | match results

 
 
正規表現ライブラリ
クラス
Original:
Classes
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basic_regex(C++11)
sub_match(C++11)
match_results(C++11)
アルゴリズム
Original:
Algorithms
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regex_match(C++11)
regex_search(C++11)
regex_replace(C++11)
イテレータ
Original:
Iterators
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regex_iterator(C++11)
regex_token_iterator(C++11)
例外
Original:
Exceptions
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regex_error(C++11)
形質
Original:
Traits
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regex_traits(C++11)
定数
Original:
Constants
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syntax_option_type(C++11)
match_flag_type(C++11)
error_type(C++11)
 
std::match_results
メンバ関数
Original:
Member functions
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match_results::match_results
match_results::~match_results
match_results::operator=
match_results::get_allocator
状態
Original:
State
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match_results::ready
要素アクセスの循環参照を解除するために使用されている
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
イテレータ
Original:
Iterators
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match_results::begin
match_results::cbegin
match_results::end
match_results::cend
フォーマット
Original:
Format
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match_results::format
修飾子
Original:
Modifiers
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match_results::swap
 
size_type size() const;
(C + + 11以来)
すなわちstd::distance(begin(), end())、サブマッチの数を返します。.
Original:
Returns the number of submatches, i.e. std::distance(begin(), end()).
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目次

[編集] パラメータ

(なし)
Original:
(none)
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[編集] 値を返します

サブマッチの数
Original:
The number of submatches
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[編集] 例外

noexcept specification:  
noexcept
  (C + + 11以来)

[編集] 複雑

定数
Original:
Constant
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[編集] も参照してください

[編集]

#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