PCRE正規表現内の任意の数の単語を文字列に一致させる

Question

PCREを正規表現解析に使用しています。特定のパターンの単語を検索する必要があります（単語の文字列内のすべての単語をコンマで区切ります）それらを文字列ベクトルに変換します。

どうすればいいですか？

Answer 1

ラフコードについて申し訳ありませんが、私は急いでいます...

pcre* re; 
    const char *error; 
    int erroffset; 
    char* subject = txt; 
    int ovector[3]; 
    int subject_length = strlen(subject); 
    int rc = 0; 


    re = pcre_compile(
    "\\w+",    /* the pattern */ 
    PCRE_CASELESS|PCRE_MULTILINE,     /* default options */ 
    &error,    /* for error message */ 
    &erroffset,   /* for error offset */ 
    NULL);    /* use default character tables */ 

    char* pofs = subject; 
    while ( rc >= 0 ) { 
    rc = pcre_exec(
     re,     /* the compiled pattern */ 
     NULL,     /* no extra data - we didn't study the pattern */ 
     subject,    /* the subject string */ 
     subject_length,  /* the length of the subject */ 
     0,     /* start at offset 0 in the subject */ 
     0,     /* default options */ 
     ovector,    /* output vector for substring information */ 
     3);   /* number of elements in the output vector */ 

    /* 
    if (rc < 0) { 
     switch(rc) { 
     case PCRE_ERROR_NOMATCH: printf("No match\n"); break; 

     // Handle other special cases if you like 

     default: printf("Matching error %d\n", rc); break; 
     } 
     pcre_free(re);  // Release memory used for the compiled pattern 
     return; 
    } 
    */ 

    /* Match succeded */ 

    if ( rc >= 0 ) { 
     pofs += ovector[1]; 

     char *substring_start = subject + ovector[0]; 

     // do something with the substring 

     int substring_length = ovector[1] - ovector[0]; 

     subject = pofs; 
     subject_length -= ovector[1]; 
    } 
    } 

Answer 2

std::string wordstring = "w1, w2, w3"; 
std::string word; 
pcrecpp::StringPiece inp_w(wordstring); 
pcrecpp::RE w_re("(\\S+),?\\s*"); 
std::vector outwords; 

while (w_re.FindAndConsume(&inp_w, &word)) { 
    outwords.push_back(word); 
}