c++ - C++ 11 正規表現エラー

Question

からの単なるサンプルコードC++ Primer 5th Edition: 17.3.3. Using the Regular Expression Library

メインファイルmain.cpp:

#include <iostream>
#include "regexcase.h"
using namespace std;

int main() {
    using_regex();
    return 0;
}

ヘッダファイルregexcase.h:

#ifndef REGEXCASE_H_
#define REGEXCASE_H_

#include <regex>
#include <string>

void using_regex();
std::string parseCode(std::regex_constants::error_type etype);

#endif /* REGEXCASE_H_ */

ソースファイルregexcase.cpp:

#include "regexcase.h"
#include <iostream>
using namespace std;

void using_regex() {
    // look for words that violate a well-known spelling rule of thumb, "i before e, except after c":
    // find the characters ei that follow a character other than c
    string pattern("[^c]ei");
    // we want the whole word in which our pattern appears
    pattern = "[a-zA-Z]*" + pattern + "[a-zA-Z]*";  //[a-zA-Z]*   [[:alpha:]]*
    try {
        regex r(pattern, regex_constants::extended);    // construct a regex to find pattern                // , regex_constants::extended
        smatch results;     // define an object to hold the results of a search
        // define a string that has text that does and doesn't match pattern
        string test_str = "receipt freind theif receive";
        // use r to find a match to pattern in test_str
        if (regex_search(test_str, results, r)) // if there is a match
            cout << results.str() << endl;      // print the matching word
        else
            cout << "no match for " << pattern << endl;
    } catch (regex_error &e) {
        cout << "what: " << e.what() << "; code: " << parseCode(e.code()) << endl;
    }
}

string parseCode(regex_constants::error_type etype) {
    switch (etype) {
    case regex_constants::error_collate:
        return "error_collate: invalid collating element request";
    case regex_constants::error_ctype:
        return "error_ctype: invalid character class";
    case regex_constants::error_escape:
        return "error_escape: invalid escape character or trailing escape";
    case regex_constants::error_backref:
        return "error_backref: invalid back reference";
    case regex_constants::error_brack:
        return "error_brack: mismatched bracket([ or ])";
    case regex_constants::error_paren:
        return "error_paren: mismatched parentheses(( or ))";
    case regex_constants::error_brace:
        return "error_brace: mismatched brace({ or })";
    case regex_constants::error_badbrace:
        return "error_badbrace: invalid range inside a { }";
    case regex_constants::error_range:
        return "erro_range: invalid character range(e.g., [z-a])";
    case regex_constants::error_space:
        return "error_space: insufficient memory to handle this regular expression";
    case regex_constants::error_badrepeat:
        return "error_badrepeat: a repetition character (*, ?, +, or {) was not preceded by a valid regular expression";
    case regex_constants::error_complexity:
        return "error_complexity: the requested match is too complex";
    case regex_constants::error_stack:
        return "error_stack: insufficient memory to evaluate a match";
    default:
        return "";
    }
}

呼び出しの出力using_regex();はwhat: regex_error; code: error_brack: mismatched bracket([ or ])

正規表現がブラケットを解析できないようです。

この質問の回答を参照してくださいregex_constants::extended。正規表現オブジェクトを初期化するために使用します。regex r(pattern, regex_constants::extended);

次に、出力はno match for [[:alpha:]]*[^c]ei[[:alpha:]]*

正規表現がパターンと一致しないようです。

次に[a-zA-Z]*、文字クラスを置き換えます[[:alpha:]]*（regex_constants::extendedまだ設定されています）。出力はまだですno match for [a-zA-Z]*[^c]ei[a-zA-Z]*

プラットホーム：windows

使用ツール: Eclipse for C/C++;MinGW (g++ --version: g++ 4.7.2)

編集：@sharthに感謝します。メインファイルを追加してコードを完成させます。