str.md

str

• regex[meta header]
• std[meta namespace]
• sub_match[meta class]
• function[meta id-type]
• cpp11[meta cpp]

string_type str() const;

概要

マッチした文字列を string_type 型で返す。キャストと同じ。

戻り値

matched ? string_type(first, second) : string_type()

例

#include <iostream>
#include <regex>

int main()
{
  const char s[] = "123";
  const std::regex re(R"(\d+)");
  std::cmatch m;
  if (std::regex_search(s, m, re)) {
    std::csub_match sub = m[0];
    if (sub.matched) {
      std::cout << '\'' << sub.str() << '\'' << std::endl;
      sub.matched = false;
      std::cout << '\'' << sub.str() << '\'' << std::endl;
    } else {
      std::cout << "not participate" << std::endl;
    }
  } else {
    std::cout << "not match" << std::endl;
  }
}

• str()[color ff0000]
• std::regex[link ../basic_regex.md]
• std::cmatch[link ../match_results.md]
• std::regex_search[link ../regex_search.md]
• std::csub_match[link ../sub_match.md]

出力

'123'
''

バージョン

言語

• C++11

処理系

• Clang: 3.0 [mark verified], 3.1 [mark verified], 3.2 [mark verified], 3.3 [mark verified], 3.4 [mark verified], 3.5 [mark verified], 3.6 [mark verified]
• GCC: 4.9.0 [mark verified], 4.9.1 [mark verified], 5.0.0 [mark verified]
• ICC: ??
• Visual C++: ??