c++ boost庫, 小記(2)

再來, 取 token. 就是把資料從字串中分離出來.
請看  boost庫的 Tokenizer.

http://www.boost.org/libs/tokenizer/introduc.htm

 #include<iostream>
#include<boost/tokenizer.hpp>
#include<string>

int main(){
   using namespace std;
   using namespace boost;
   string s = "This is,  a test";
   tokenizer<> tok(s);
   for(tokenizer<>::iterator beg=tok.begin(); beg!=tok.end();++beg){
       cout << *beg << "\n";
   }
}

The default TokenizerFunction is char_delimiters_separator<char> which defaults to breaking up a string based on space and punctuation.
用 space 跟 ',' 分割 "This is , a test" 應該會得到 "This"  "is"  "a" "test"

Tokenizer 還有其它用法, 有char_separator,escaped_list_separator,offset_separator,官網上有更詳細的介紹.
http://www.boost.org/libs/tokenizer/index.html