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std::match_results::prefix

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
 
const_reference prefix() const;
(C + + 11以来)

[編集] パラメータ

(なし)
Original:
(none)
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[編集] 値を返します

標的配列の先頭と正規表現のマッチ全体の間の標的配列の一部を表すsub_matchを返します。.
Original:
Returns a sub_match representing the part of the target sequence between the beginning of the target sequence and the entire match of the regular expression.
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[編集]

#include <iostream>
#include <regex>
#include <string>
 
int main()
{
  std::regex re("a(a)*b");
  std::string target("baaaby");
  std::smatch sm;
 
  std::regex_search(target, sm, re);
  std::cout << sm.prefix().str() << '\n';
}

Output:

b