Question

对你们来说应该很容易......

我正在玩使用Boost的tokenizer，我想创建一个以逗号分隔的标记。这是我的代码：

    string s = "this is, , ,  a test";
boost::char_delimiters_separator<char> sep(",");
boost::tokenizer<boost::char_delimiters_separator<char>>tok(s, sep);


for(boost::tokenizer<>::iterator beg= tok.begin(); beg!=tok.end(); ++beg)
{
    cout << *beg << "\n";
}

我想要的输出是：

This is


 a test

我得到的是：

This
is
,
,
,
a
test

已更新

Answer 1

您必须将分隔符分配给tokenizer！

boost::tokenizer<boost::char_delimiters_separator<char>>tok(s, sep);

另外，用char_separator替换已弃用的char_delimiters_separator：

string s = "this is, , ,  a test";
boost::char_separator<char> sep(",");
boost::tokenizer< boost::char_separator<char> > tok(s, sep);
for(boost::tokenizer< boost::char_separator<char> >::iterator beg = tok.begin(); beg != tok.end(); ++beg)
{
    cout << *beg << "\n";
}

请注意，还有一个模板参数不匹配：输入这样复杂类型的好习惯：所以最终版本可能是：

string s = "this is, , ,  a test";
boost::char_separator<char> sep(",");
typedef boost::tokenizer< boost::char_separator<char> > t_tokenizer;
t_tokenizer tok(s, sep);
for (t_tokenizer::iterator beg = tok.begin(); beg != tok.end(); ++beg)
{
    cout << *beg << "\n";
}

Boost :: tokenizer逗号分隔（c ++）

1 个答案: